btclib: a python3 library for 'bitcoin cryptography'
Bitcoin TypeScript/JavaScript Library for NodeJS, Browser and Mobile. Segwit & Taproot support.✨
HTTP Message Signatures (RFC 9421) in Go
CryptGuard is a comprehensive cryptographic library, offering robust encryption and decryption capabilities. It integrates traditional cryptography with post-quantum algorithms, ensuring resilience against quantum computing threats.
A node package for signing and verifying HTTP messages as per RFC 9421 - HTTP Message Signatures specification
Sign and verify messages with Gnosis Safe
Per-message signing + replay protection for MCP and A2A traffic. TypeScript / Python / Rust. Wire version aip/0.1.
🛠️ Ethereum key explorer and message signing tool. Paste a private key to get the public key, Keccak-256 hash, and address. Works entirely offline in your browser.
JavaScript functions for blockchain signing and verifying messages.
A full-stack Web3 application built with React and Node.js, featuring headless wallet authentication via Dynamic.xyz for secure message signing and verification.
Signing & Recovering Messages using an Ethereum Wallet
Verifiable agent-to-agent (A2A) identity. Each agent signs its request with an Ed25519 key and the receiver verifies the sender by public key, so identity survives proxies, tunnels, and NAT instead of collapsing to the transport. Runnable two-container demo on Pilot Protocol request-signing (reqsig).
Draft A2A extension: per-message JWS provenance — ES256-signed, card-version-pinned receipts for Agent2Agent messages, verifiable live or in later audit.
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