public_comp_key.insert(public_comp_key.begin(),(unsignedchar)(2+p_public_compressed_key_mode));// Add one byte to indicate cmpressed-y-0 (0x02) or compressed-y-1 (0x03)
public_enc_comp_key.insert(public_enc_comp_key.begin(),(unsignedchar)(2+p_public_compressed_key_mode));// Add one byte to indicate cmpressed-y-0 (0x02) or compressed-y-1 (0x03)