If you're working in the e-ID space you might have heard of the "Longfellow" and "Crescent" papers, which implement zero-knowledge proofs on existing credentials. We wrote a deep-dive with @elgharee @clemhumb into these papers and compare them here:

https://eid-privacy.github.io/wp0/2025/11/28/crescent-longfellow-showdown.html

TLDR: very impressive work, but very difficult to reproduce as a normal software dev.

#EID #Swiyu #ZKP