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longfellow-zk (Google)

Last modified: 2026-10-23

URL: https://github.com/longfellow-zk/longfellow-zk

Summary

C++ implementation of Google's Longfellow ZK library for identity protocols (Ligero + sumcheck), including circuits for proving ECDSA-signed ISO mdoc credentials and SHA-256 in zero knowledge; the repository moved from google/longfellow-zk to the longfellow-zk organisation. Transparent and fast on phones; rated 3.5/5 in the eid-privacy WP2 evaluation (C++ only, APIs unclear).