Open-source alternatives to Polycrypt

Easy to use cryptographic framework for data protection: secure messaging with forward secrecy and secure data storage. Has unified APIs across 14 platforms.

Port of TweetNaCl cryptographic library to JavaScript

Forge is a JavaScript cryptography library providing a comprehensive set of tools for symmetric and asymmetric encryption, hashing, and digital signatures. It includes a full Transport Layer Security implementation for establishing secure network connections and managing encrypted traffic. The project implements a wide array of public key infrastructure tools, including X.509 certificate management, the generation of certificate signing requests, and the validation of certificate chains. It provides a PKCS cryptographic toolkit for handling secure archives and signed messages, alongside suppo

Closure Library is a JavaScript standard library and utility toolset designed for building large-scale web applications. It provides a collection of core utility modules and standardized APIs to simplify complex application logic and state management. The project is built as a modular framework using a namespace-based module system to prevent global scope pollution. It is specifically designed for use with the Closure Compiler to enable aggressive dead-code elimination and minification, reducing the final delivery size in production. To ensure reliability in large projects, the library utiliz

Following googlecode project crypto-js, provide standard and secure cryptographic algorithms for NodeJS. Support MD5, SHA-1, SHA-256, RC4, Rabbit, AES, DES, PBKDF2, HMAC, OFB, CFB, CTR, CBC, Base64

Fast and dependency-free cryptographic hashing library for node.js and browsers (supports MD5, SHA1, SHA256, SHA512, RIPEMD, HMAC)

libsodium compiled to Webassembly and pure JavaScript, with convenient wrappers.

CAUTION: END OF SUPPORT ON 3 JUN 2026. The 'jsrsasign' (RSA-Sign JavaScript Library) is an opensource free cryptography library supporting RSA/RSAPSS/ECDSA/DSA signing/validation, ASN.1, PKCS#1/5/8 private/public key, X.509 certificate, CRL, OCSP, CMS SignedData, TimeStamp, CAdES and JSON Web Signature/Token in pure JavaScript.

This is a Node.js library for securely hashing and verifying passwords using the bcrypt adaptive hashing algorithm. It functions as a password security module that transforms plain-text credentials into protected hashes and generates cryptographically secure salts. The implementation allows for the adjustment of computational cost to resist brute-force attacks. It provides utilities for password hash verification and the extraction of hash metadata to determine the number of encryption rounds used. The project covers a range of security and access control capabilities, including credential s

Fast crypto toolkit for modern client-side JavaScript

OpenPGP implementation for JavaScript

Minimal JS implementation of older cryptography algorithms: RSA, DSA, DH.

Audited & minimal JS implementation of Salsa20, ChaCha and AES

Audited & minimal JS implementation of elliptic curve cryptography.

Audited & minimal JS implementation of hash functions, MACs and KDFs.

Auditable & minimal JS implementation of public-key post-quantum cryptography

URSA - RSA public/private key OpenSSL bindings for Node.js

High-performance pure-javascript SHA1 implementation suitable for large binary data, reaching up to half the native speed.

Pure-Javascript High-level API to Emscripten-compiled libsodium routines. -- MOVED TO https://git.leastfixedpoint.com/tonyg/js-nacl

jsencrypt is a JavaScript library for performing RSA encryption, decryption, and key generation. It functions as an asymmetric key generator and digital signature provider that executes all cryptographic processing directly in the browser. The library focuses on the use of the PEM standard for importing, exporting, and managing cryptographic keys. It provides the ability to create public and private RSA key pairs of various bit sizes and supports OpenSSL compatible formats. Its capabilities cover the transformation of plaintext into ciphertext and the recovery of original messages using corr

JavaScript Cryptographic Library with performance in mind.

An easy-to-use encryption system utilizing RSA and AES for javascript.