DEPRECATED - Client for Privacy Pass protocol providing unlinkable cryptographic tokens

Implementation of the local and global unlinkability metrics for biometric template protection systems

Maximal Linkability metric to evaluate the linkability of (protected) biometric templates. Paper: "Measuring Linkability of Protected Biometric Templates using Maximal Leakage", IEEE-TIFS, 2023.

Auditably privacy-preserving age verification with RFC 9474 RSA blind signatures. A relying party learns only the age predicate (over-13/18/…); the issuer never sees the nonce, token, or site; unlinkability is verifiable, not promised. Python uv workspace. Research prototype — unaudited.

One-bit, unlinkable, stateless age verification — the ZK verifier the EU didn't ship. Proof in → true/false out. Replaces ID uploads and face scans. Built on google/longfellow-zk.

A privacy-preserving, revocable, multi-verifier credential system with auditability and unlinkability.

Open specification for a privacy-native authentication protocol. Proves validity without recording identity. Built on WebAuthn, ZKP, and NFC proximity. — I. Smid-Woelders, 2026

Browser-based BBS+ selective disclosure demo — BLS12-381 pairings. A signed credential is all-or-nothing: to prove one field you hand over the whole document. BBS+ proves knowledge of the issuer's signature while revealing only what you choose — and randomizes every presentation, so two showings are unlinkable. Revocation is the honest tension.

Browser-based blind signature demo — Chaum RSA blind signatures, Schnorr EC blind signatures, anonymous e-cash, private voting, and unlinkability proofs. No backends. No simulated math.