@startuml skinparam monochrome true skinparam defaultFontName Arial skinparam classFontSize 10 skinparam sequenceBoxBorderColor #black participant "**SSP Host**\nAccessor Authentication Service Gate" as hosta_fs_ctr participant "**SSP Host**\nAdministration Gate" as hosta_adm participant "**Other Host**\nAdministration Gate" as hostb_adm participant "**Other Host**\nAccessor Authentication Application Gate" as hostb_fs_ctr participant "**SSP Host**\nXXX Service Gate" as hosta_fs_data participant "**Other Host**\nXX Application Gate" as hostb_fs_data autonumber ...**Notation:** Gate Identifier : Pipe Session Open on [P_IN,P_OUT]... ... opt hostb_fs_ctr->hosta_fs_ctr: AAS-ADMIN-GET-CAPABILITIES-Service-Command on P₁₀ activate hosta_fs_ctr activate hostb_fs_ctr hosta_fs_ctr-->hostb_fs_ctr: eANY-OK [FS_ID₀₀₀₁] on P₂₀ deactivate hostb_fs_ctr deactivate hosta_fs_ctr end ... opt [requested for Token based authentication] hostb_fs_ctr->hosta_fs_ctr: AAS-GET-CHALLENGE-Service-Command [Parameters...] on P₁₀ activate hosta_fs_ctr activate hostb_fs_ctr hosta_fs_ctr-->hostb_fs_ctr: eANY-OK on P₂₀, aAS-Challenge deactivate hostb_fs_ctr deactivate hosta_fs_ctr end ... hostb_fs_ctr->hosta_fs_ctr: AAS-OP-AUTHENTICATE-ACCESSOR-Service-Command [Parameters...] on P₁₀, aAAS-Token activate hosta_fs_ctr activate hostb_fs_ctr hosta_fs_ctr-->hostb_fs_ctr: eANY-OK on P₂₀, aAAS-Token deactivate hostb_fs_ctr deactivate hosta_fs_ctr alt Successful authentication hosta_adm->hostb_adm:EVT_ADM_BIND [**aGate-Identifier ,P₁₁**] hostb_adm->hosta_adm:EVT_ADM_BIND [**aGate-Identifier ,P₂₁**] note right of hostb_fs_data : Application_{aGate-Identifier} : Pipe Session Open on [P₂₁,P₁₁] note left of hosta_fs_data: Service_{aGate-Identifier} : Pipe Session Open on [P₁₁,P₂₁] hosta_fs_data<-hostb_fs_data: XXX Operations [Parameters...] on P₁₁ activate hosta_fs_data activate hostb_fs_data hostb_fs_data<--hosta_fs_data: eANY-OK [Parameters...] on P₂₁ deactivate hostb_fs_data deactivate hosta_fs_data ... end hostb_adm->hosta_adm:EVT_ADM_UNBIND [**P₁₁**] note right of hostb_fs_data : Service_{aGate-Identifier} : Pipe Session closed on [P₂₁,P₁₁] note left of hosta_fs_data: Service_{aGate-Identifier} : Pipe Session closed on [P₁₁,P₂₁] @enduml