Dibran Mulder

The EUDI wallet ecosystem is being built for Level of Assurance "high", which means resistance against attackers with a high attack potential, up to and including state actors. Yet almost every cryptographic mechanism it standardises on today, from the signatures on your credentials to the TLS between its servers, is exactly the kind of asymmetric cryptography that a large quantum computer breaks. This post is about that gap, and about why "we will get to it later" is a harder position to defend for a high-assurance wallet than for almost any other system on the internet.

A field guide to the attestation triad behind a Level of Assurance High wallet, WIA, WUA and key attestation, why the EU Age Verification App failed exactly here, and how app attestation closes the gap.

After shipping OpenID4VP support last year and migrating all Privacy by Design issuers to SD-JWT VCs earlier this year, today we're closing the loop: Yivi now supports both OpenID4VCI and OpenID4VP. Issuers and verifiers can integrate with Yivi entirely using open standards.

We're opening a private BETA and inviting organizations to be among the first to integrate.

A security analysis of the EU Age Verification Wallet reveals a privacy-first design with a critical trust gap that undermines its security guarantees.

We're pleased to announce that all Privacy by Design Foundation issuers now issue SD-JWT Verifiable Credentials alongside traditional Idemix credentials. This marks a significant milestone in Yivi's transition to becoming a fully EUDI-compliant wallet.

We're thrilled to announce that Yivi now supports ID-cards and Dutch Driver Licenses as credentials. This expansion significantly broadens Yivi's international reach and makes the platform more accessible to users worldwide.

According to our mission, we are committed to transparency and accountability. This post-mortem is part of that commitment, detailing the events surrounding the outage of the 7th of January 2026.

Summary of the impact​

We experienced significant degradated user experience on the 7th of January 2026, which affected our services for approximately 4 hours. During this time, users experienced inconsistent success rates in onboarding the Yivi app and or issuing credentials to them. The issue was caused by key rotation of the Yivi scheme and successive issues which arose from rotating the key.

We are announcing the release of the Trusted Verifier on the 24th of September!

Trusted Verifiers marks a crucial step forward in our mission to enhance the security and reliability of digital identity verification within the Yivi ecosystem. It also secures the long term sustainability of the Yivi project.

We are excited to announce the BETA release of Yivi Passport credentials!
This new feature allows users to securely store and manage their digital passports within the Yivi wallet, enhancing convenience and accessibility for travelers. With this release, Yivi expands its reach to a truly international audience.

Our mission is to make Yivi the most privacy and user friendly wallet out there. In line with this mission we developed our crypto agile vision, allowing users to use different cryptographic technologies in a seamless way. As part of this vision, we want to support verifiable credentials, which are becoming increasingly popular in the digital identity space.