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</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">AsciiChar Name<var>;</font>
</p>
<p class="class_31"></p>
<p class="class_32">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">// encoding examples: (the bits with // grey background represent the <br />// length encoding of the vector's<br />// length, X the first of the // vector's following payload bits)</font>
</p>
<p class="class_32">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">// Vector length 5:<br />// Bits: <font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">0<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">0000101 XXXXXXXX XXXXXXXX</font>
</font>
</font>
</p>
<p class="class_32">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">// Vector length 123:<br />// Bits: <font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">0<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">1111011 XXXXXXXX XXXXXXXX</font>
</font>
</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">// Vector length 388:<br />// Bits: <font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">10<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">000001 10000100 XXXXXXXX</font>
</font>
</font>
</p>
</td>
</tr>
<tr style="height: 0in;"> <td style="border: 1px solid black; width: 1.46458in;">
<p class="class_30">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">Opaque fields</font>
</p>
</td> <td style="border: 1px solid black; width: 2.55in;">
<p class="class_30">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">Opaque fields are blocks of data whose content interpretation is not further specified</font>
</p>
</td> <td style="border: 1px solid black; width: 2.67917in;">
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">opaque fieldname[n];</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">opaque fieldname<n>;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">opaque fieldname<var>;</font>
</p>
</td>
</tr>
<tr style="height: 0in;"> <td style="border: 1px solid black; width: 1.46458in;">
<p class="class_30">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">Enumerations</font>
</p>
</td> <td style="border: 1px solid black; width: 2.55in;">
<p class="class_30">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">Enumerations are list of labels with a unique value for each label, and optionally a maximum value (which then determines length of encoding)</font>
</p>
</td> <td style="border: 1px solid black; width: 2.67917in;">
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">enum {de(0), fr(1), it(2)} Country;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">enum {de(0), fr(1), it(2), (2^8‑1)} Country;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">// both variants encoding in one </font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">// octet</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">enum {de(0), fr(1), it(2), (2^16‑1)} Country;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">// Encoding in two octets</font>
</p>
</td>
</tr>
<tr style="height: 0in;"> <td style="border: 1px solid black; width: 1.46458in;">
<p class="class_30">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">Constructed types</font>
</p>
</td> <td style="border: 1px solid black; width: 2.55in;">
<p class="class_30">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">Constructed types contain other types</font>
</p>
</td> <td style="border: 1px solid black; width: 2.67917in;">
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">struct {</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Name name;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Country country;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} Person;</font>
</p>
</td>
</tr>
<tr style="height: 0in;"> <td style="border: 1px solid black; width: 1.46458in;">
<p class="class_30">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">Case statements</font>
</p>
</td> <td style="border: 1px solid black; width: 2.55in;">
<p class="class_30">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">Case statements are used inside constructed types to change the contents of the constructed type depending on the value of the variable given in brackets</font>
</p>
</td> <td style="border: 1px solid black; width: 2.67917in;">
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">struct {</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Name name;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Country country;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />select(country) {</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case de:</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />uint8 age;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case fr:</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />AsciiChar given_name<2^8‑1>;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />}</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} Person;</font>
</p>
</td>
</tr>
<tr style="height: 0in;"> <td style="border: 1px solid black; width: 1.46458in;">
<p class="class_30">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">External data</font>
</p>
</td> <td style="border: 1px solid black; width: 2.55in;">
<p class="class_30">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This is external data that has impact on a struct, e.g. in a select statement. It shall be described from where the external data is obtained</font>
</p>
</td> <td style="border: 1px solid black; width: 2.67917in;">
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">struct {</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Name name;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />extern Country country;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />select(country) {</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case de:</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />uint8 age;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case fr:</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />AsciiChar given_name<2^8‑1>;</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />}</font>
</p>
<p class="class_31">
<font style="font-family: Courier New; font-size: 8pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} Person;</font>
</p>
</td>
</tr>
</tbody>
</table>
</p>
<p class="class_5"></p>
<h2 class="class_25">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786154">4.2<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Specification of basic format elements</a>
</font>
</h2>
<h3 class="class_33">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786155">4.2.1<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<a id="type_int_x">IntX</a>
</a>
</font>
</h3>
<p class="class_34">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">int_x <img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />IntX;</font>
</p>
<p class="class_31"></p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This data type encodes an integer of variable length. The length of this integer is encoded by a number of 1 bits followed by a 0 bit, where the number of 1 bits is equal to the number of additional octets used to encode the integer besides those used (partially) to encode the length. The encoding of the length shall use at most 7 bits set to 1.</font>
</p>
<p class="class_27">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">EXAMPLE:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />00001010 encodes the integer 10, while 10001000 10001000 encodes the integer 2 184. The bits encoding the length of the element are coloured with a grey background.</font>
</p>
<p class="class_26">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">NOTE:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />This definition is similar to the definition of PSID in IEEE 1609.3-2010 [<a href="REF">i.4</a>], clause 8.1.3, but allows bigger values of the encoded integer.</font>
</p>
<h3 class="class_33">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786156">4.2.2<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />PublicKeyAlgorithm</a>
</font>
</h3>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">enum {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />ecdsa_nistp256_with_sha256(0),</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />ecies_nistp256(1),</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />reserved(240..255),</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />(2^8-1)</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} PublicKeyAlgorithm;</font>
</p>
<p class="class_31"></p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This enumeration lists supported algorithms based on public key cryptography. Values in the range of 240 to 255 shall not be used as they are reserved for internal testing purposes.</font>
</p>
<p class="class_26">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">NOTE:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />This definition is similar to the one in IEEE 1609.2 Draft D12 [<a href="REF">i.2</a>], clause 6.2.16, but <font style="font-family: Courier New;">ecdsa_nistp224_with_sha224<font style="font-family: Times New Roman;"> is not supported by the present document. As a consequence, the numbering of identical elements (e.g. <font style="font-family: Courier New;">ecies_nistp256<font style="font-family: Times New Roman;">) differs.</font>
</font>
</font>
</font>
</font>
</p>
<h3 class="class_33">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786157">4.2.3<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<a id="type_symmetricalgorithm">SymmetricAlgorithm</a>
</a>
</font>
</h3>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">enum {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />aes_128_ccm (0),</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />reserved (240..255),</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />(2^8-1)</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} SymmetricAlgorithm;</font>
</p>
<p class="class_31"></p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This enumeration lists supported algorithms based on symmetric key cryptography. Values in the range of 240 to 255 shall not be used as they are reserved for internal testing purposes. The algorithm <font style="font-family: Courier New;">aes_128_ccm<font style="font-family: Times New Roman;"> denotes the symmetric key cryptography algorithm AES-CCM as specified in NIST SP 800-38C [<a href="REF">4</a>].</font>
</font>
</font>
</p>
<p class="class_26">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">NOTE:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Except naming, this definition is identical to the one in IEEE 1609.2 Draft D12 [<a href="REF">i.2</a>], clause 6.2.23.</font>
</p>
<h3 class="class_33">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786158">4.2.4<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />PublicKey</a>
</font>
</h3>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">struct {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />PublicKeyAlgorithm<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />algorithm;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />select(algorithm) { </font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case ecdsa_nistp256_with_sha256:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />EccPoint<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />public_key;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case ecies_nistp256:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />SymmetricAlgorithm<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />supported_symm_alg;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />EccPoint<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />public_key;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />unknown:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />opaque<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />other_key<var>;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />} </font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} PublicKey;</font>
</p>
<p class="class_31"></p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This structure defines a wrapper for public keys by specifying the used algorithm and - depending on the value of <font style="font-family: Courier New;">algorithm<font style="font-family: Times New Roman;"> - the necessary data fields:</font>
</font>
</font>
</p>
<ul style="list-style-type: disc; margin: 0in 0in 0in 0.511806in; padding: 0pt; text-indent: -0.314583in; text-align: left;">
<p class="class_35 b1+"> <li class="class_36">
<font style="font-family: Times New Roman; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">ecdsa_nistp256_with_sha256: the specific details regarding ECC contained in an <a href="type">EccPoint</a> structure shall be given.
<span class="requality_text id_ab9e2898-6189-4d9a-b908-74c5226bb19e"><a class="requality_id" id="id_ab9e2898-6189-4d9a-b908-74c5226bb19e" name="ab9e2898-6189-4d9a-b908-74c5226bb19e"></a>The </span><font style="font-family: Courier New;"><span class="requality_text id_ab9e2898-6189-4d9a-b908-74c5226bb19e">EccPoint</span><font style="font-family: Times New Roman;"><span class="requality_text id_ab9e2898-6189-4d9a-b908-74c5226bb19e"> used in a </span><font style="font-family: Courier New;"><span class="requality_text id_ab9e2898-6189-4d9a-b908-74c5226bb19e">PublicKey</span><font style="font-family: Times New Roman;"><span class="requality_text id_ab9e2898-6189-4d9a-b908-74c5226bb19e"> shall not have </span><font style="font-family: Courier New;"><span class="requality_text id_ab9e2898-6189-4d9a-b908-74c5226bb19e">EccPointType</span><font style="font-family: Times New Roman;"> <font style="font-family: Courier New;"><span class="requality_text id_ab9e2898-6189-4d9a-b908-74c5226bb19e">x_coordinate_only</span><font style="font-family: Times New Roman;"><span class="requality_text id_ab9e2898-6189-4d9a-b908-74c5226bb19e">.</span></font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</li>
</p>
<p class="class_35 b1+"> <li class="class_36">
<font style="font-family: Times New Roman; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">ecies_nistp256: the specific details regarding ECC contained in an <a href="type">EccPoint</a> structure and the symmetric key algorithm contained in a <a href="type">SymmetricAlgorithm</a> structure shall be given.
<span class="requality_text id_327b37e5-c93a-43f9-a88b-a47f21468381"><a class="requality_id" id="id_327b37e5-c93a-43f9-a88b-a47f21468381" name="327b37e5-c93a-43f9-a88b-a47f21468381"></a>The </span><font style="font-family: Courier New;"><span class="requality_text id_327b37e5-c93a-43f9-a88b-a47f21468381">EccPoint</span><font style="font-family: Times New Roman;"><span class="requality_text id_327b37e5-c93a-43f9-a88b-a47f21468381"> used in a </span><font style="font-family: Courier New;"><span class="requality_text id_327b37e5-c93a-43f9-a88b-a47f21468381">PublicKey</span><font style="font-family: Times New Roman;"><span class="requality_text id_327b37e5-c93a-43f9-a88b-a47f21468381"> shall not have </span><font style="font-family: Courier New;"><span class="requality_text id_327b37e5-c93a-43f9-a88b-a47f21468381">EccPointType</span><font style="font-family: Times New Roman;"> <font style="font-family: Courier New;"><span class="requality_text id_327b37e5-c93a-43f9-a88b-a47f21468381">x_coordinate_only</span><font style="font-family: Times New Roman;"><span class="requality_text id_327b37e5-c93a-43f9-a88b-a47f21468381">.</span></font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</li>
</p>
<p class="class_35 b1+"> <li class="class_36">
<font style="font-family: Times New Roman; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">unknown: in all other cases, a variable-length vector containing opaque data shall be given.</font>
</li>
</p>
</ul>
<p class="class_26">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">NOTE:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Except naming of included types, this definition is identical to the one in IEEE 1609.2 Draft D12 [<a href="REF">i.2</a>], clause 6.3.31.</font>
</p>
<h3 class="class_33">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786159">4.2.5<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<a id="type_eccpublickey">EccPoint</a>
</a>
</font>
</h3>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">struct {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />extern PublicKeyAlgorithm<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />algorithm;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />extern uint8<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />field_size;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />EccPointType<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" /> type;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />opaque<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />x[field_size];</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />select(type) {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case x_coordinate_only:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case compressed_lsb_y_0:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case compressed_lsb_y_1:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case uncompressed:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />opaque<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />y[field_size];</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />unknown:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />opaque<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />data<var>;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />}</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} EccPoint;</font>
</p>
<p class="class_31"></p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This structure defines a public key based on elliptic curve cryptography according to IEEE 1363-2000 [<a href="REF">1</a>], clause 5.5.6. An <font style="font-family: Courier New;">EccPoint<font style="font-family: Times New Roman;"> encodes a coordinate on a two dimensional elliptic curve. The x coordinate of this point shall be encoded in <font style="font-family: Courier New;">x<font style="font-family: Times New Roman;"> as an unsigned integer. Depending on the key type, the <font style="font-family: Courier New;">y<font style="font-family: Times New Roman;"> coordinate shall be encoded case-specific:</font>
</font>
</font>
</font>
</font>
</font>
</font>
</p>
<ul style="list-style-type: disc; margin: 0in 0in 0in 0.511806in; padding: 0pt; text-indent: -0.314583in; text-align: left;">
<p class="class_37 b1+"> <li class="class_36">
<font style="font-family: Courier New; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">x_coordinate_only<font style="font-family: Times New Roman;">: only the x coordinate is encoded, no additional data shall be given.</font>
</font>
</li>
</p>
<p class="class_37 b1+"> <li class="class_36">
<font style="font-family: Courier New; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">compressed_lsb_y_0<font style="font-family: Times New Roman;">: the point is compressed and <font style="font-family: Consolas;">y<font style="font-family: Times New Roman;">'s least significant bit is zero, no additional data shall be given.</font>
</font>
</font>
</font>
</li>
</p>
<p class="class_37 b1+"> <li class="class_36">
<font style="font-family: Courier New; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">compressed_lsb_y_1<font style="font-family: Times New Roman;">: the point is compressed and <font style="font-family: Consolas;">y<font style="font-family: Times New Roman;">'s least significant bit is one, no additional data shall be given.</font>
</font>
</font>
</font>
</li>
</p>
<p class="class_37 b1+"> <li class="class_36">
<font style="font-family: Courier New; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">uncompressed<font style="font-family: Times New Roman;">: the y coordinate is encoded in the field <font style="font-family: Courier New;">y<font style="font-family: Times New Roman;"> as an unsigned integer. The y coordinate contained in a vector of length <font style="font-family: Courier New;">field_size<font style="font-family: Times New Roman;"> containing <font style="font-family: Courier New;">opaque<font style="font-family: Times New Roman;"> data shall be given.</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</li>
</p>
<p class="class_37 b1+"> <li class="class_36">
<font style="font-family: Courier New; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">unknown<font style="font-family: Times New Roman;">: in all other cases, a variable-length vector containing <font style="font-family: Courier New;">opaque<font style="font-family: Times New Roman;"> data shall be given.</font>
</font>
</font>
</font>
</li>
</p>
</ul>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">The <font style="font-family: Courier New;">uint8<font style="font-family: Times New Roman;"> <font style="font-family: Courier New;">field_size<font style="font-family: Times New Roman;"> defining the lengths of the vectors containing the raw keys shall be derived from the given algorithm and the mapping as defined in table <a href="ref">2</a>. The necessary algorithm shall be given as an external link to the parameter <a href="recipientinfo">
<font style="font-family: Courier New;">pk_encryption</font>
</a> specified in the structure <a href="type">
<font style="font-family: Courier New;">RecipientInfo</font>
</a>.</font>
</font>
</font>
</font>
</font>
</p>
<p class="class_29">
<table style="border-collapse: collapse; border-spacing: 0pt;">
<tbody>
<tr style="height: 0in;"> <td colspan="2" style="border-bottom: 1px solid black; width: 3.93611in;">
<p class="class_29">
<font style="font-style: normal; font-weight: bold; text-decoration: none; vertical-align: baseline;">Table <font style="font-style: normal; font-weight: bold; text-decoration: none; vertical-align: baseline;">: <a id="tab_derived_field_sizes">Derivation of field sizes</a> <br />depending on the used algorithm</font>
</font>
</p>
</td>
</tr>
<tr style="height: 0in;"> <td style="border: 1px solid black; width: 1.96458in;">
<p class="class_30">
<font style="font-size: 9pt; font-style: normal; font-weight: bold; text-decoration: none; vertical-align: baseline;">PublicKeyAlgorithm value</font>
</p>
</td> <td style="border: 1px solid black; width: 1.97153in;">
<p class="class_30">
<font style="font-size: 9pt; font-style: normal; font-weight: bold; text-decoration: none; vertical-align: baseline;">Length in octets</font>
</p>
</td>
</tr>
<tr style="height: 0in;"> <td style="border: 1px solid black; width: 1.96458in;">
<p class="class_30">
<font style="font-size: 9pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">ecdsa_nistp256_with_sha256</font>
</p>
</td> <td style="border: 1px solid black; width: 1.97153in;">
<p class="class_17">
<font style="font-size: 9pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">32</font>
</p>
</td>
</tr>
<tr style="height: 0in;"> <td style="border: 1px solid black; width: 1.96458in;">
<p class="class_30">
<font style="font-size: 9pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">ecies_nistp256</font>
</p>
</td> <td style="border: 1px solid black; width: 1.97153in;">
<p class="class_17">
<font style="font-size: 9pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">32</font>
</p>
</td>
</tr>
</tbody>
</table>
</p>
<p class="class_5"></p>
<p class="class_26">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">NOTE:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Except inclusion of all remaining elements of the enumeration EccPointType that previously matched to case <font style="font-family: Courier New;">uncompressed<font style="font-family: Times New Roman;"> and inclusion of case <font style="font-family: Courier New;">unknown<font style="font-family: Times New Roman;">, this definition is identical to the EccPublicKey in IEEE 1609.2 Draft D12 [<a href="REF">i.2</a>], clause 6.2.18.</font>
</font>
</font>
</font>
</font>
</p>
<h3 class="class_33">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786160">4.2.6<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />EccPointType</a>
</font>
</h3>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">enum { </font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />x_coordinate_only(0),</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />compressed_lsb_y_0(2),</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />compressed_lsb_y_1(3),</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />uncompressed(4),</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />(2^8-1)</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} EccPointType;</font>
</p>
<p class="class_31"></p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This enumeration lists supported ECC point types.</font>
</p>
<p class="class_26">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">NOTE:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />This definition is identical to the one in IEEE 1609.2 Draft D12 [<a href="REF">i.2</a>], clause 6.2.19.</font>
</p>
<h3 class="class_33">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786161">4.2.7<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<a id="type_encryptionparameters">EncryptionParameters</a>
</a>
</font>
</h3>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">struct {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />SymmetricAlgorithm<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<a id="encryptionparameters_symm_alg_param">symm_algorithm</a>;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />select(symm_algorithm) {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case aes_128_ccm:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />opaque<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />nonce[12];</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />unknown:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />opaque<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />params<var>;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />}</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} EncryptionParameters;</font>
</p>
<p class="class_31"></p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This structure holds basic parameters and additional data required for encryption and decryption of data using different symmetric encryption algorithms. In case of <font style="font-family: Courier New;">aes_128_ccm<font style="font-family: Times New Roman;"> a 12 octet nonce shall be given. The parameter <font style="font-family: Courier New;">Tlen<font style="font-family: Times New Roman;"> according to NIST SP 800-38C [<a href="REF">4</a>] shall be set to <font style="font-family: Courier New;">Tlen <font style="font-family: Times New Roman;">= 128 (bits) and no associated data shall be given. In other cases the data shall be given as a variable-length vector containing <font style="font-family: Courier New;">opaque<font style="font-family: Times New Roman;"> data. It is out of scope of this definition how resulting ciphertexts are transported. Typically, a ciphertext should be put into a <a href="type">
<font style="font-family: Courier New;">Payload</font>
</a> data structure marked as<font style="font-family: Arial;"> <font style="font-family: Courier New;">encrypted<font style="font-family: Times New Roman;"> using the <a href="type">
<font style="font-family: Courier New;">PayloadType</font>
</a>.</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</p>
<p class="class_26">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">NOTE:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />This structure is not available in IEEE 1609.2 Draft D12 [<a href="REF">i.2</a>].</font>
</p>
<h3 class="class_33">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786162">4.2.8<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<a id="type_signature">Signature</a>
</a>
</font>
</h3>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">struct {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />PublicKeyAlgorithm<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />algorithm;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />select(algorithm) {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case ecdsa_nistp256_with_sha256:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />EcdsaSignature<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />ecdsa_signature;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />unknown:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />opaque<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />signature<var>;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />}</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} Signature;</font>
</p>
<p class="class_31"></p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This structure defines a container that encapsulates signatures based on public key cryptography. Depending on the value of <font style="font-family: Courier New;">algorithm<font style="font-family: Times New Roman;">, different data structures define the algorithm-specific details:</font>
</font>
</font>
</p>
<ul style="list-style-type: disc; margin: 0in 0in 0in 0.511806in; padding: 0pt; text-indent: -0.314583in; text-align: left;">
<p class="class_37 b1+"> <li class="class_36">
<font style="font-family: Courier New; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">ecdsa_nistp256_with_sha256<font style="font-family: Times New Roman;">: the signature contained in an <a href="type">
<font style="font-family: Courier New;">EcdsaSignature</font>
</a> structure shall be given.</font>
</font>
</li>
</p>
<p class="class_37 b1+"> <li class="class_36">
<font style="font-family: Courier New; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">unknown<font style="font-family: Times New Roman;">: in all other cases, a variable-length vector containing the signature as <font style="font-family: Courier New;">opaque<font style="font-family: Times New Roman;"> data shall be given.</font>
</font>
</font>
</font>
</li>
</p>
</ul>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">The data in this structure can be used to verify a data structure's integrity. In conjunction with a matching <a href="type">
<font style="font-family: Courier New;">SignerInfo</font>
</a> structure, the data structure's authenticity can also be verified.</font>
</p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">It is necessary to note the following points:</font>
</p>
<ul style="list-style-type: disc; margin: 0in 0in 0in 0.511806in; padding: 0pt; text-indent: -0.314583in; text-align: left;">
<p class="class_35 b1+"> <li class="class_36">
<font style="font-family: Times New Roman; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">Clause <a href="cla">5.6</a> defines which parts of a <a href="type">
<font style="font-family: Courier New;">SecuredMessage</font>
</a> data structure are covered by a signature.</font>
</li>
</p>
<p class="class_35 b1+"> <li class="class_36">
<font style="font-family: Times New Roman; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">The length of the <font style="font-family: Courier New;">security_field<var><font style="font-family: Times New Roman;"> variable length vector in the <a href="type">
<font style="font-family: Courier New;">SecuredMessage</font>
</a> containing the <font style="font-family: Courier New;">Signature<font style="font-family: Times New Roman;"> field shall be calculated before creating the signature using the length of the signature.</font>
</font>
</font>
</font>
</font>
</li>
</p>
<p class="class_35 b1+"> <li class="class_36">
<font style="font-family: Times New Roman; font-size: 10pt; font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">Before calculating the actual signature, the length field of the surrounding variable length vector <a href="type">
<font style="font-family: Courier New;">TrailerField</font>
</a>
<font style="font-family: Courier New;"> <font style="font-family: Times New Roman;">shall be calculated using the value of <font style="font-family: Courier New;">field_size<font style="font-family: Times New Roman;">, since this length field is part of the signed content.</font>
</font>
</font>
</font>
</font>
</li>
</p>
</ul>
<p class="class_26">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">NOTE:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Except naming and full inclusion (not marked as <font style="font-family: Courier New;">extern<font style="font-family: Times New Roman;">) of the enumeration <font style="font-family: Courier New;">PublicKeyAlgorithm<font style="font-family: Times New Roman;">, this definition is identical to the one in IEEE.1609.2 Draft D12 [<a href="REF">i.2</a>], clause 6.2.15.</font>
</font>
</font>
</font>
</font>
</p>
<h3 class="class_33">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786163">4.2.9<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<a id="type_ecdsasignature">EcdsaSignature</a>
</a>
</font>
</h3>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">struct {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />extern PublicKeyAlgorithm<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />algorithm;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />extern uint8<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />field_size;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />EccPoint<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" /> R;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />opaque<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />s[field_size];</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} EcdsaSignature;</font>
</p>
<p class="class_31"></p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This structure defines the details needed to describe an ECDSA based signature. This field's length <font style="font-family: Courier New;">field_size<font style="font-family: Times New Roman;"> is derived from the applied ECDSA algorithm using the mapping as specified in table <a href="">2</a>. The extern link that specifies the algorithm points to the algorithm defined in the surrounding <a href="type">
<font style="font-family: Courier New;">Signature</font>
</a> structure. <font style="font-family: Courier New;">R<font style="font-family: Times New Roman;"> contains the x coordinate of the elliptic curve point resulting from multiplying the generator element by the ephemeral private key. <span class="requality_text id_cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1"><a class="requality_id" id="id_cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1" name="cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1"></a>The EccPointType of </span><font style="font-family: Courier New;"><span class="requality_text id_cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1">R</span><font style="font-family: Times New Roman;"><span class="requality_text id_cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1"> shall be set to either </span><font style="font-family: Courier New;"><span class="requality_text id_cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1">compressed_lsb_y_0</span><font style="font-family: Times New Roman;"><span class="requality_text id_cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1">, </span><font style="font-family: Courier New;"><span class="requality_text id_cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1">compressed_lsb_y_1</span><font style="font-family: Times New Roman;"><span class="requality_text id_cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1"> or </span><font style="font-family: Courier New;"><span class="requality_text id_cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1">x_coordinate_only</span><font style="font-family: Times New Roman;"><span class="requality_text id_cd4f4ae8-6cdd-439b-a1bb-3c8c47d8bfc1">. </span></font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</font>
</p>
<p class="class_26">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">NOTE 1:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Except naming of included type<font style="font-family: Courier New;"> PublicKeyAlgorithm<font style="font-family: Times New Roman;">, this definition is identical to the one in IEEE 1609.2 Draft D12 [<a href="REF">i.2</a>], clause 6.2.17.</font>
</font>
</font>
</p>
<p class="class_26">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">NOTE 2:<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />It is possible to add extra information by transferring the complete point R in a compressed form instead of only the x coordinate. This extra information may then be used for a faster signature verification algorithm as outlined in "Accelerated verification of ECDSA signatures" [<a href="REF">i.6</a>].</font>
</p>
<h3 class="class_33">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<a id="_Toc421786164">4.2.10<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<a id="type_signerinfo">SignerInfo</a>
</a>
</font>
</h3>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">struct {</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />SignerInfoType type;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />select(type){</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case self:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case certificate_digest_with_sha256:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />HashedId8<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />digest;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case certificate:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Certificate<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />certificate;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case certificate_chain:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />Certificate<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />certificates<var>;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />case certificate_digest_with_other_algorithm:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />PublicKeyAlgorithm<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />algorithm;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />HashedId8<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />digest;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />unknown:</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />opaque<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />info<var>;</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">
<img height="1" border="0" width="18" src="data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs%3D" />}</font>
</p>
<p class="class_31">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">} SignerInfo;</font>
</p>
<p class="class_31"></p>
<p class="class_5">
<font style="font-style: normal; font-weight: normal; text-decoration: none; vertical-align: baseline;">This structure defines how to give information about the signer of a message. The included cryptographic identity can be used in conjunction with the structure <a href="type">
<font style="font-family: Courier New;">Signature</font>
</a> to verify a message's authenticity. Depending on the value of <font style="font-family: Courier New;">type<font style="font-family: Times New Roman;">, the <a href="type">
<font style="font-family: Courier New;">SignerInfo</font>