#signing

Local first, air-gapped identity for individuals, AI agents, organizations, with permissioning. Docs below are for contributors.

Netezos is a cross-platform Tezos SDK for .NET developers, simplifying the access and interaction with the Tezos blockchain

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AAuth

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ECDSA, EdDSA, RSA-PSS and RSA-PKCS#1 signature algorithms for ruby

Open .skill Protocol - a sealed, inspectable package format for AI agent skills. Reference implementation: skillerr.

RSS for state. Open portable evidence layer for machine state - preserving what an agent or system saw, produced, derived and learned, so another party or future agent can verify the lineage independently.

Multi-chain typescript signature sdk, supports bitcoin, ethereum, solana, cosmos, etc.

PHP Privacy - The OpenPGP library in PHP language

Majik Signature is a hybrid post-quantum content signing and verification library for the Majikah ecosystem. Built on top of Majik Key, it provides tamper-proof, forgery-resistant digital signatures for any content format — using a dual-algorithm architecture that combines classical Ed25519 with post-quantum ML-DSA-87 (FIPS-204).

Greentic update platform foundation: signed update plans, installed-artifact catalogue/diff, staging, and airgap envelopes.

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Unified wallet adapter interface for managed signing providers (Privy, Turnkey, Fireblocks, Bankr) and local keys

Ruby implementation of RFC 8152 CBOR Object Signing and Encryption (COSE)

A complete TypeScript library for connecting to and making transactions on different blockchains

GourdianToken is a robust, battle-tested JWT token management system for modern Go applications. Designed with performance, flexibility, and enterprise-grade security in mind, it provides an all-in-one solution for managing access and refresh tokens across both monolithic and microservice architectures.

Official Python SDK for the 1Claw secrets management platform

BLS signature implementation on the BLS12-381 curve that meets the IETF spec.