OpenID Foundation Resource Hub for European Digital Identity Wallet Implementers 

Latest update: December 10, 2025

We are delighted to offer EUDIW a centralised resource hub on the specifications, open source tests, conformance tools and other materials to help deploy and maintain your implementations.

OIDF Specs selected for the EIDAS 2.0 ARF

The EIDAS 2.0 Architecture Reference Framework includes reference to three key specs for issuance of credentials and presentation of credentials:

• OpenID for Verifiable Credential Issuance 1.0 Final
• OpenID for Verifiable Presentation 1.0 Final 
• High Assurance Interoperability Profile 1.0 draft 5 (targeted as final December 23, 2025)

These three specs are developed and maintained by the Digital Credentials Protocols (DCP) Working Group. Their overall goal is to develop OpenID specifications for the Issuer-Holder-Verifier-Model use-cases to enable issuance and presentations of the Digital Credentials of any format. The EUDIW has selected two credential formats for launch, IETF’s SD-JWT and ISO/IEC 18013-5 mdoc. 

To monitor the DCP WG's progress and connect with working group members, please join the mailing list.

There is no fee to join the mailing list and you will receive meeting minutes, updates on the specifications, in person WG meeting details, security analysis on the specs, and interop events to prove out the specs. 

Anyone can contribute to the DCP WG for no fee, just a signed contribution agreement. Membership is optional and enables voting, discounts on self-certification and the ability to direct funds.

Open source tests are freely available 

Any implementer can leverage the freely available open source tests that have been proven out already via the 11 interop events conducted to date this year. Tests may be downloaded and run locally or run from the OIDF server. 

Tests for OpenID for Verifiable Presentation 1.0 + HAIP 1.0 (with SD-JWT and mdoc)

Tests for OpenID for Verifiable Credential Issuance 1.0 + HAIP 1.0 (with SD-JWT, noting mdoc is coming soon)

No fees apply unless the implementer wishes to have their implementation self-certified as passing all the relevant tests. 

Self-Certification Coming by Feb 2026

The current beta tests for all three specs will be refined and released for self-certification on or before February 2026. This will allow implementers to assert their conformance to the specs publicly via the OpenID foundation website. Prices for self-certification are expected to be $700 for members per implementation and per spec and $3500 for non members per implementation and per spec. Some implementations may also be invited to bundle their specs for self-certification to simplify the processes and costs. Implementers can learn more about OIDF self-certification on our Certification webpage and when the tests are final and ready for launch a public announcement will be made and DCP WG contributors will be notified. 

Interoperability events past and future 

OpenID Foundation has conducted 11 interop events in 2025 to prove out the DCP WG specs listed above, with two major milestones with the specs proven out before taking the specs to final. 

May Interop- OpenID4VP specs and tests proven out before moving to final  

July Interop- OpenID4VCI specs and tests proven out before moving to final    

November 2025 Interop- OpenID4VP 1.0 + HAIP 1.0 and OpenID4VCI 1.0 + HAIP 1.0 specs and tests proven out before moving to final  

The DCP Working group is considering another interop end of January/ early February 2026 to prove out the OpenID4VP 1.1+ HAIP 1.1 and OpenID4VCI 1.0+HAIP 1.0 inclusive of new functionality such as Interactive Authorization Endpoint (IAE), intended to still allow for backward compatibility with 1.0 final specs. Any DCP WG contributor is welcome to participate in interop events, and more information will be distributed via the DCP WG as dates and scope are finalized. 

Other events are likely to emerge as the year progresses, e.g. the OIDF may well partner again with the ISO/IEC on an interop event ahead of the May 2026 ISO/IEC SC17 WG10 meeting in France, and an announcement is coming soon on joint WG10 and DCP WG in line with mutual interest in spec progression and averting redundancy. OIDF may also act in support of ETSI and other organisations  for any interop events in 2H 2026 as implementers ramp up for launch. 

OpenID4VP/VCI/HAIP Test Requirements 

Historically it has not been OIDF standard practice to write test requirements. Instead it was common for specs and tests to be written in parallel so that the test requirements were implicit and embedded within the open source tests. This is different to ISO that has typically had test requirements like those in ISO/IEC 18013-6. In consultation with the European Commission and ETSI, the DCP WG and the OpenID Foundation’s certification team intend to make test requirement draft specifications available by the end of February in line with EC conformance program timelines. The OIDF is in the process of scoping this work in partnership with ETSI to help avert fragmentation at both the test requirement or test code levels. This work will progress in the DCP WG with Certification team support. The expectation is that the test requirements will align for testing tools that will follow, including OIDFs and the services that Member State’s respective Conformity Assessment Bodies will deploy in due course. 

Ecosystem Support Community Group

The Ecosystem Support Community Group is dedicated to supporting new Open Data ecosystems as they implement and profile OIDF standards.

The CG is developing a Digital Waller Reference Technical Architecture and Best Practices document for the benefit of ecosystem participants. This is expected to be useful for jurisdictions that wish to interoperate with the EU region and other implementers of OpenID4VP/VCI/HAIP. According to current data compiled by OIDF, 38 jurisdictions have selected the OpenID4VP/VCI/HAIP specs for their wallet and verifiable credential programs.  

This CG seeks to provide lightweight support for ecosystem architects and decision makers to share best practices and engage on common problems related to governance and deployment outside of spec writing (e.g. what spec configuration may be best or best suit a market, what adoption tactics have worked best.

To participate in the Ecosystem Support CG, please join the mailing list.

Individuals or their legal entity will need to sign a Participation Agreement.

About the OpenID Foundation

The OpenID Foundation (OIDF) is a global open standards body committed to helping people assert their identity wherever they choose. Founded in 2007, we are a community of technical experts leading the creation of open identity standards that are secure, interoperable, and privacy preserving. The Foundation’s OpenID Connect standard is now used by billions of people across millions of applications. In the last five years, the Financial Grade API has become the standard of choice for Open Banking and Open Data implementations, allowing people to access and share data across entities. Today, the OpenID Foundation’s standards are the connective tissue to enable people to assert their identity and access their data at scale, the scale of the internet, enabling “networks of networks” to interoperate globally. Individuals, companies, governments and non-profits are encouraged to join or participate. Find out more at openid.net.