1.1 Standardized Wire Protocol Interfaces

TAS³ emphasizes wire protocol interoperability in following key areas

1. Single Sign-On (SSO) and Single Logout (SLO)

2. Authorization request-response

3. ID Mapping and Discovery

4. Web service call

5. Audit bus reporting and audit trail querying

6. Delegation

7. Metadata, registrations, declarations of attribute needs, declarations of attribute availability

In some areas TAS³ recognizes interoperability need, but leaves it up to the business processes, adaptive techniques, and involved parties to agree specific means. These include

• Policy and obligations languages and vocabularies (although we suggest XACML and SOL1, see section 2.12, as one alternative, supported by the reference implementation)

• Trust and Privacy Negotiation protocol and metrics or scores (although we suggest TrustBuilder and some XACML extensions, see section ?tas3proto-ProtocolsandProfiles-RealizationoftheTrustandPrivacyNegotiatorFunction?)

• Application ("payload") protocols and data formats

• Format of the local audit trail

• Business Process Modelling techniques and languages

TAS³ recognizes the usefulness of a consistent user experience, e.g. in Dashboard, SSO, consent, trust and privacy negotiation, policy editing, etc., but this document does not attempt to prescribe these aspects.