When it comes to portable identity verification, people often see it as a user feature, but in reality, it involves three completely different parties with distinct demands.

On the user side, the goal is simple—completing a single KYC process is enough, without repeated verifications. For application developers? They hope to reduce user onboarding costs and minimize regulatory hassles. And regulatory agencies have different requirements—they need identity information to be verifiable, consistent, and auditable.

The problem is that most existing identity systems haven't truly solved this triangular challenge. There are still many technical and institutional pitfalls to address.