{"id":50486861,"url":"https://github.com/systemslibrarian/crypto-lab-mpcith-sign","last_synced_at":"2026-06-01T23:02:41.475Z","repository":{"id":352209513,"uuid":"1214283092","full_name":"systemslibrarian/crypto-lab-mpcith-sign","owner":"systemslibrarian","description":"Browser-based MPC-in-the-Head signature demo — additive secret sharing, SHA-256 commitments, Merkle proofs, Fiat-Shamir transform, N-party simulation with hidden-view challenge, toy PERK permutation witness. Post-quantum signatures from hash functions alone. NIST Round 2: Mirath, PERK, FAEST. No backends. 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It demonstrates a toy linear relation proof for\nknowledge of a witness x where A*x = b (mod q), plus a toy PERK-style\npermutation witness flow. The algorithm family is post-quantum and\nzero-knowledge oriented, with signature security tied to hash commitments and\nthe hardness of the underlying statement relation. It is an educational model,\nnot a production cryptographic implementation.\n\n## When to Use It\n\n- Teaching how interactive identification becomes signatures with Fiat-Shamir.\n  This demo exposes commit, challenge, and response artifacts directly.\n- Explaining additive secret sharing and all-but-one view opening in MPCitH.\n  The party cards show shares, local outputs, commitments, and hidden-view flow.\n- Comparing assumption diversity against lattice-based signatures.\n  The exhibits contrast MPCitH tradeoffs such as larger signatures.\n- Prototyping UI-level understanding of toy PERK-style permutation witnesses.\n  It shows relation checks and verification outcomes in browser-only TypeScript.\n- Not for production key management or compliance claims.\n  Toy parameters and educational code are not suitable for deployment security.\n\n## Live Demo\n\nhttps://systemslibrarian.github.io/crypto-lab-mpcith-sign/\n\nThe live app lets you split a secret into shares, run simulated party views,\nissue a challenge, and verify revealed views in an MPCitH-style round. You can\nalso run Fiat-Shamir signing traces and a toy PERK sign/verify flow while\nadjusting controls such as party count N and field prime q.\n\n## How to Run Locally\n\n```bash\ngit clone https://github.com/systemslibrarian/crypto-lab-mpcith-sign\ncd crypto-lab-mpcith-sign\nnpm install\nnpm run dev\n```\n\nNo environment variables are required.\n\n## Part of the Crypto-Lab Suite\n\nOne of 60+ live browser demos at\n[systemslibrarian.github.io/crypto-lab](https://systemslibrarian.github.io/crypto-lab/)\n- spanning Atbash (600 BCE) through NIST FIPS 203/204/205 (2024).\n\n---\n\n*\"Whether you eat or drink, or whatever you do, do all to the glory of God.\" — 1 Corinthians 10:31*\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsystemslibrarian%2Fcrypto-lab-mpcith-sign","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fsystemslibrarian%2Fcrypto-lab-mpcith-sign","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fsystemslibrarian%2Fcrypto-lab-mpcith-sign/lists"}