Europe is working towards a wallet-based identity ecosystem. The Architecture and Reference Framework (ARF) is intended to serve as a basis for the implementation of the proposal for the European Digital Identity Framework. Two protocols are in the core of the specification: ISO 18013-5:2021 (mDL) and OpenID4VC + Verifiable Credentials. The current version of the ARF has declared the organizational trust out of scope. However, for a real world ecosystem, it is clear an interoperable trust fabric will be needed to support the OpenID4VC + Verifiable Credentials ecosystem, but also the mDL based scenarios.

The OIDC federation specification seems to have many characteristics that would allow such a wallet ecosystem to be defined. This activity will investigate and test the use of the OIDC federation protocol as a trust fabric for a wallet ecosystem.

This activity will have the following activities:

• Evaluate ARF for trust framework related requirements - The Common Union Toolboxfor a Coordinated Approach Towards aEuropean Digital Identity Framework
• Evaluate the existing Italian eIDAS implementation - Italian eIDAS Wallet Technical Specifications version: latest documentation | Italian EUDI Wallet Technical Specifications 
• Evaluate the OIDCfederation specification
• Evaluate the OpenID4VC specification
• Describe how OIDCfederation may be leveraged in with OpenID4VC
• Plan and build test setup to verify the usability of OIDCfederation in the context of a wallet ecosystem

The following parties will use the results of this activity:

The following results were created and delivered:

• Main findings are shown in the final demo, find the recording and pdf here: Incubator demos
• 4 Experimental schemas (but necessarily not actual proposal, as the work is continued in differnet setting): https://github.com/surfnet-niels/REFEDs-specifications/tree/main