Cryptography

Cryptography, or cryptology is the practice and study of techniques for secure communication in the presence of adversarial behavior. More generally, cryptography is about constructing and analyzing protocols that prevent third parties or the public from reading private messages.

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bitcoin /bitcoin

Star88.2k

Bitcoin Core integration/staging tree

c-plus-plus cryptography bitcoin p2p cryptocurrency

UpdatedFeb 20, 2026
C++

TheAlgorithms /JavaScript

Star34.1k

Algorithms and Data Structures implemented in JavaScript for beginners, following best practices.

javascript search cryptography algorithm cipher algorithms mathematics sort data-structures conversions sorting-algorithms algorithm-challenges hacktoberfest algorithms-implemented

UpdatedSep 4, 2025
JavaScript

anoma /anoma

Star34.1k

Reference implementation of Anoma

distributed-systems cryptography erlang elixir protocol blockchain p2p consensus operating-system

UpdatedFeb 19, 2026
Elixir

openssl /openssl

Sponsor

Star29.6k

TLS/SSL and crypto library

tls ssl cryptography encryption openssl decryption

UpdatedFeb 20, 2026
C

bee-san /Ciphey

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Star21k

⚡ Automatically decrypt encryptions without knowing the key or cipher, decode encodings, and crack hashes ⚡

python natural-language-processing cryptography cipher cpp hacking artificial-intelligence pentesting ctf hashes encodings decryption hacktoberfest ctf-tools encryptions deep-neural-network cyberchef-magic

UpdatedMar 5, 2025
Python

amark /gun

Sponsor

Star18.9k

An open source cybersecurity protocol for syncing decentralized graph data.

machine-learning cryptography crypto encryption database big-data graph offline-first protocol end-to-end dapp decentralized blockchain realtime p2p artificial-intelligence crdt web3 metaverse dweb

UpdatedFeb 5, 2026
JavaScript

javascript-obfuscator /javascript-obfuscator

Star15.9k

A powerful obfuscator for JavaScript and Node.js

nodejs javascript flow security encoding cryptography javascript-obfuscator obfuscation uglify protection obfuscate js-obfuscator typescript browser string control-flow obfuscator mangle literal flattening

UpdatedFeb 4, 2026
TypeScript

zama-ai /bounty-program

Star15.5k

Zama Bounty Program: Contribute to the FHE space and Zama's open source libraries and get rewarded 💰

cryptography fully-homomorphic-encryption zama bounty-program

UpdatedFeb 20, 2026

cryptomator /cryptomator

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Star14.6k

Cryptomator for Windows, macOS, and Linux: Secure client-side encryption for your cloud storage, ensuring privacy and control over your data.

java security cryptography privacy crypto encryption cloud-storage cryptomator

UpdatedFeb 20, 2026
Java

tink-crypto /tink

Star13.6k

Tink is a multi-language, cross-platform, open source library that provides cryptographic APIs that are secure, easy to use correctly, and hard(er) to misuse.

javascript java go security cryptography crypto cpp objc

UpdatedApr 17, 2024
Java

jedisct1 /libsodium

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Star13.5k

A modern, portable, easy to use crypto library.

c cryptography crypto zig-package

UpdatedFeb 20, 2026
C

krzyzanowskim /CryptoSwift

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Star10.6k

CryptoSwift is a growing collection of standard and secure cryptographic algorithms implemented in Swift

swift cryptography aes cipher md5 digest aes-gcm hmac sha1 hmac-authentication commoncrypto sha3 cryptoswift

UpdatedJan 19, 2026
Swift

monero-project /monero

Star10.3k

Monero: the secure, private, untraceable cryptocurrency

security c-plus-plus cryptography privacy cmake blockchain p2p cryptocurrency monero cryptonote

UpdatedFeb 18, 2026
C++

OpenMined /PySyft

Sponsor

Star9.9k

Perform data science on data that remains in someone else's server

python cryptography privacy deep-learning pytorch hacktoberfest secure-computation syft federated-learning

UpdatedJul 15, 2025
Python

lightningnetwork /lnd

Star8.1k

Lightning Network Daemon ⚡️

cryptography lightning bitcoin protocol peer-to-peer blockchain payments cryptocurrency micropayments lightning-network

UpdatedFeb 20, 2026
Go

PrivateBin /PrivateBin

Star8k

A minimalist, open source online pastebin where the server has zero knowledge of pasted data. Data is encrypted/decrypted in the browser using 256 bits AES.

php security cryptography crypto paste pastebin self-hosted one-time encrypted self-hosting self-destroy hacktoberfest