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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.

UX challenges of a crypto agile wallet

· 10 min read
Dibran Mulder
CTO @ Caesar Groep

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.