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Yivi announces end to end OpenID support: private BETA now open

· 5 min read
Dibran Mulder
CTO @ Caesar Groep

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 Yivi user loads in his eduID and discloses it using OpenID4VP using Veramo verifier software.

A comparative look at digital driving licenses

· 7 min read
Daniël Baay
Intern @ Caesar Groep

Digital driving licenses are being introduced across Europe and beyond, but they don’t all work the same way.

As part of my Master's thesis, I researched the progress and current state of digital driving licenses, also known as mobile driving licenses (mDLs). I compared Austria, Australia, and Germany to understand how these systems differ in practice, and what that means for wallet-based identification.

Austria and Australia, specifically New South Wales (NSW), are both relatively advanced in implementing mDLs. Austria stands out as a European frontrunner, with mDLs aligned with ISO standards and accepted by the police. Australia, while non-European, also has a working system, but with notable differences in design.

Germany, in contrast, has not yet introduced mDLs. Adoption is slower, and both legal and cultural approaches are more cautious. Together, these countries provide a useful comparison on multiple aspects: operational vs. non-operational systems, EU vs. non-EU contexts, and fast vs. slow adoption.

Looking ahead with PostGuard

· 5 min read
Ruben Hensen
Developer @ Caesar Groep

PostGuard logo

The Yivi team is working hard on Yivi itself to become EUDI compliant, but besides Yivi we're also working hard on other projects like PostGuard. In this blog we'll tell you about PostGuard and what PostGuard's plans are for the coming year. We hope to get you just as excited about PostGuard as we are. And that when you want to send files, you'll do it with PostGuard of course!

Post-mortem of the 7th of Januari

· 3 min read
Dibran Mulder
CTO @ Caesar Groep

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.

Announcing Yivi OpenID4VP support

· 10 min read
Wouter Ensink
Developer @ Caesar Groep

A few months ago, we announced our plans to become an EUDI wallet while still retaining our original privacy-by-design technology.

Since that announcement, we've come a long way, and today it's time to announce the release of the first major step towards true crypto agility: the support for the OpenID4VP protocol and the SD-JWT VC credential format in the Yivi app. In this blog, we'll dive into how we did this and what it means for you.

24th of September: Release of Trusted Verifier

· 3 min read
Dibran Mulder
CTO @ Caesar Groep

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.