SAG and LSAG ring signatures on secp256k1 — prove group membership without revealing identity

Privacy-preserving, verifiable Web of Trust for Nostr. LSAG ring-signature-backed NIP-85 assertions.

Obscura: Privacy-Preserving Protocol for the Algorand Blockchain Using LSAG Ring Signatures

Browser-based ring signature demo — LSAG signatures, key image linkability, double-spend detection, group signatures with manager opening, and Monero transaction privacy. No backends. No simulated math.