k256_flow (cargo): Flow-Rust-SDK Version of k256 secp256k1 elliptic curve library written in pure Rust with support for ECDSA signing/verification (including Ethereum-style signatures with public-key recovery), Elliptic Curve Diffie-Hellman (ECDH), and general purpose secp256k1 curve arithmetic useful for implementing arbitrary group-based protocols.  Heavily modified for signing Flow blockchain transactions 
Keywords: crypto|bitcoin|secp256k1|ethereum|ecc|ecdsa|nist|rust|schnorr|taproot