bip340

Hierarchical Threshold Signature Scheme

Audited & minimal library for creating, signing & decoding Bitcoin transactions.

Swift cryptography library for Bitcoin and Nostr. ECDSA, Schnorr, ECDH, and zero-knowledge proofs on secp256k1. Apple platforms and Linux.

Pure JavaScript implementation of BIP340 Schnorr Signatures for secp256k1

A Python library for 'bitcoin cryptography'

Flexible Rust implementation of the MuSig2 multisignature protocol, compatible with Bitcoin.

Developer Preview of the Internet Computer (ICP)'s Threshold Schnorr Signing API

A modern suite of cryptography tools, built for the plebian developer.

Schnorr Signatures for secp256k1 in Java

Python bindings to libsecp256k1

Java Crypto Library for Threshold Signature Schemes, Threshold ECIES and related primitives. Used in TKeeper

JavaCard/NFC/contact smartcard signer research, APDU contracts, simulator, and PC/SC boundary for nSealr.

GoSlimStratum Assets - Installers, uninstallers and templates

Benchmarks of btclib and btclib_secp256k1 against their comparands

Raspberry/Pi stateless QR vault software for nSealr signing devices, using shared QR/review contracts.

The entire Bitcoin cryptography stack in one pure-Python file. Zero dependencies. Verified against official BIP test vectors (BIP-32/39/143/173/340/341/350).

Shared nSealr protocol contracts, schemas, QR/review contracts, approval digests, and NIP-01/BIP-340 conformance vectors.

Quantum-safe migration for Bitcoin/Taproot keys — bind secp256k1 to ML-DSA-65 (FIPS-204), official-vector-verified, MIT. Runnable in <2 min.

On-chain Ethereum↔Nostr identity bridge with BIP-340 Schnorr verification — smart contract, TypeScript SDK, and example client