eccrypto is a JavaScript elliptic curve cryptography library for Node.js and browsers that implements ECDSA, ECDH, and ECIES operations using the secp256k1 curve. It provides functions for generating keys, signing/verifying messages, deriving shared secrets, and encrypting/decrypting data with AES-256-CBC. The library is designed for developers building secure cryptographic applications who need elliptic curve operations in JavaScript environments.