Comment by Confiks

> This is the fallback mechanism. You are supposed to use bbs+ signatures that are zero knowledge, are computed on the device and so on.

You're mistaken. SD-JWT with linkable ECDSA signature is the main mechanism. An unlinkable signature scheme is being discussed on the fringes of the EUDI-project (whether it be BBS+ or Longfellow) and very bare-bones support for Longfellow has been added to the reference wallet a month ago. However the Implementing Acts have no support for such a mechanism yet, and most member states will only implement ECDSA based mechanisms (SD-JWT and ISO 18013) for the foreseeable future.

It's therefore very likely the EUDI wallet and/or a age verification solutions will launch with issuer linkable ("easily trackable") signatures.

See also this thread: https://news.ycombinator.com/item?id=45363275