crypto-js

CryptoJS is a JavaScript library of cryptographic standards providing implementations of popular hashing algorithms, ciphers, and encoding utilities that work in both browser and Node.js environments. The library includes hash functions (MD5, SHA-1, SHA-256, SHA-512, SHA-3, RIPEMD-160), keyed-hash message authentication codes (HMAC with any hash function), symmetric encryption algorithms (AES, DES, Triple DES, Rabbit, RC4), and encoding utilities (Base64, Hex, UTF-8, Latin1). CryptoJS is particularly useful in browser environments where the Web Crypto API may not support all needed algorithms, or when synchronous cryptographic operations are required. The AES implementation supports CBC, CFB, CTR, OFB, and ECB modes with PKCS7 padding. For common use cases, CryptoJS provides simple string-based encryption: CryptoJS.AES.encrypt('message', 'secret').toString() and CryptoJS.AES.decrypt(ciphertext, 'secret').toString(CryptoJS.enc.Utf8). While Node.js's built-in crypto module and the Web Crypto API are recommended for security-critical applications, CryptoJS remains popular for its simple API, browser compatibility, and convenience for non-security-critical cryptographic operations like checksums and basic encryption.