A Python package for EMV cryptography in payment systems

A secure IndexedDB store with built-in encryption

Cryptographic utilities built on Python's standard library. Zero external dependencies. Designed for rapid prototyping and restricted environments.

CLI for the recovery of OMNI funds (any OP_RETURN inputs) out of a Bitcoin Multisig Wallet

A Java library that can be used to create mnemonics for the Stellar Network (e.g. for your Android app)

a high-level async cryptographic anonymity library to scale, simplify, & automate privacy best practices for secure data & identity processing, communication, & storage.

A simple password hashing & compare golang package

Implementation of the single-step key derivation function (KDF) as described in NIST Special Publication 800-56C Rev1 supporting messages digest and HMAC.

Simple, offline, cross-platform secrets manager written in Rust.

Key derivation function for defense against brute force attacks for defense against brute force attacks

Fast, cross-platform, RFC-compliant implementation of HMAC-based Extract-and-Expand Key Derivation Function (HKDF) in .NET Standard

cryptio is a modern Go library for secure password-based encryption and decryption, featuring Argon2id key derivation and AES-GCM. Choose your desired security level—Standard, Medium, or High—for optimal protection and performance balance.

A proof of concept for how you can turn a duplex-style AEAD scheme (e.g., AEGIS) into a memory-hard password-based KDF.

Encryption adapter for https://github.com/vladimiry/fs-json-store

Hierarchical secret derivation with Blake2b and RNGs

A password manager that utilizes PostgreSQL, AES Encryption, and PBKDF2 to create a simple and secure password storage and retrieval system.

Tools for collecting entropy and deriving keys

expo-crypto-lib is a universal toolkit for hybrid RSA + AES encryption and BIP-39 mnemonic key derivation. Built for Expo and React Native, with native-standard security and seamless Node.js compatibility. JavaScript-only module; it has no native iOS/Android code and does not require prebuild hooks.

Key diversification for Ultralight C tags