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.

GitHub: https://github.com/topics/cryptography
Wikipedia: https://en.wikipedia.org/wiki/Cryptography
Last updated: 2026-07-02 00:06:57 UTC
JSON Representation

https://github.com/danielost/sp-box

S-box/p-box implementation

block-ciphers cryptography p-box s-box

Last synced: 12 Jul 2025

https://github.com/uofsc-fall-2022-math-587-001/homework5

Diffie-Hellman key exchange and ElGamal cryptosystem. Plus Shanks' algorithm for solving the discrete logarithm problem.

cryptography discrete-logarithm go latex math

Last synced: 12 May 2026

https://github.com/endurio/ndrd

Endurio Daemon

blockchain cryptocurrency cryptography currency decentralized distributed payment stablecoin

Last synced: 14 Jan 2026

https://github.com/quantumcoinproject/circl

Hybrid Post Quantum Cryptography Library in GO

blockchain cryptography hybrid-pqc pqc quantumcoin

Last synced: 05 Jun 2026

https://github.com/velascort/cryptography-practice

Practice in Python using cryptography

cryptography python

Last synced: 07 Oct 2025

https://github.com/samhaque/hashgame

Fun little hash game to test players information theory skills

bcrypt cryptography flask mongodb python

Last synced: 10 May 2026

https://github.com/vobst/ctf-nsa_backdoor

Solution of picoCTF 2022 NSA backdoor challenge.

backdoor cryptography ctf-writeups nsa picoctf

Last synced: 07 Oct 2025

https://github.com/vobst/ctf-hireme

Solution for NERD's HireMe.c challenge.

cryptography ctf-writeups interview-questions nintendo reverse-engineering

Last synced: 30 Jun 2025

https://github.com/davidkirwan/number_station

This gem contains a number of utilities to aid in the running of a number station.

cryptography number-station one-time-pad one-time-pad-cipher pseudorandom pseudorandom-number-generator radio

Last synced: 08 Nov 2025

https://github.com/cturner8/secure-chat

cryptography encryption nextjs react supabase typescript

Last synced: 12 Jan 2026

https://github.com/1limxapp/react-native-chacha20-poly1305

ChaCha20-Poly1305 encryption/decryption for Flutter. Native implementation makes sure it has the fastest performance.

256-bit aes android chacha20 chacha20-poly1305 chacha20poly1305 cihper cipher-algorithms cross-platform cryptography encryption encryption-algorithms ios javascript react react-native typescript

Last synced: 21 Feb 2026

https://github.com/kizh4324/prodigy_cs_01

Implement Caesar cipher

caesar-cipher cryptography decryption encryption python

Last synced: 28 May 2026

https://github.com/cwaring/ucan-inspector

An embeddable Web Component for inspecting UCAN tokens directly in the browser.

authorization authz cryptography debugger devtools js ucan vue3

Last synced: 16 Jan 2026

https://github.com/mokkunsuzuki-code/stage355

Stage355: Signature Key Status Verification and Revocation Enforcement Layer with signing-time validity checks, Stage354 ledger binding, fail-closed revoked-key rejection, and PQC intent-only protection.

audit cryptography cybersecurity ed25519 evidence fail-closed gpg key-revocation key-rotation key-status ledger ml-dsa pqc qsp signature-verification sigstore supply-chain-security transparency trust verification

Last synced: 23 Jun 2026

https://github.com/bi-zone/ctfzone-2020-finals-littleknowledge

CTFZone 2020 Finals Crypto task LittleKnowledge

c cryptography ctf ctf-challenges docker libfuzzer python3

Last synced: 08 May 2026

https://github.com/alexiza84/nexus

nexuS is an innovative software tool designed to streamline data management and analysis processes. With its user-friendly interface and powerful features, nexuS empowers users to efficiently organize, analyze, and visualize their data.

ansible ansible-role cryptography dotnet emulator graphql groovy mmorpg molecule-scenario nexus private-tracker sonatype torrent wildstar

Last synced: 07 Apr 2026

https://github.com/primefactor-io/lhtlp

Implementation of the Linearly-Homomorphic Time-Lock Puzzle scheme

cryptography cryptography-algorithms homomorphic-cryptography-scheme homomorphic-encryption homomorphic-encryption-library time-lock time-lock-puzzle

Last synced: 15 May 2025

https://github.com/tell/drbg

cryptography deterministic-randomness randomness-generation

Last synced: 08 Oct 2025

https://github.com/primefactor-io/paillier

Implementation of the Paillier cryptosystem alongside its homomorphic operations

cryptography cryptography-algorithms homomorphic-cryptography-scheme homomorphic-encryption homomorphic-encryption-library paillier paillier-cryptosystem

Last synced: 26 Oct 2025

https://github.com/pmuens/cryptolab

R&D environment to study Cryptography so we can roll our own eventually

cryptography cryptography-algorithms ecdh ecdsa elliptic-curve-cryptography elliptic-curves learning-with-errors post-quantum-cryptography

Last synced: 15 May 2025

https://github.com/albinzayedrawan/asymmetric-encryption

Lab Exercises about asymmetric encryption with RSA & Diffie-Hellman.

asymmetric-encryption cryptography diffie-hellman-key-exchange rsa-encryption

Last synced: 19 Jul 2025

https://github.com/selendra/contract-registry

Selendra Contract Registry is a WASM smart contract registry writen in Rust based on ink! smart contract framwork.

cryptocurrency cryptography p2p-network payment rustlang smart-contracts token wasm

Last synced: 24 Apr 2026

https://github.com/ya2ir/sha1

SHA-1 in Golang

cryptography hashing-algorithm hashing-algorithms sha-1 sha-1-hash

Last synced: 08 Oct 2025

https://github.com/xandersteyn/rsa-timing-attack

A Python script demonstrating a timing attack on RSA decryption, recovering private key bits by analyzing execution time differences.

cryptographic-analysis cryptographic-attacks cryptography cybersecurity encryption ethical-hacking key-recovery multiprocessing penetration-testing python rsa rsa-key-attack security-research timing-attacks

Last synced: 16 Mar 2025

https://github.com/keyweeusr/elchacha

ChaCha20 implementation as per RFC7539

chacha20 cryptography cryptography-algorithms elisp emacs rfc7539

Last synced: 08 Oct 2025

https://github.com/ndpar/spring-crypto-demo

Examples of crypto operations in Kotlin and Spring

bouncycastle cryptography openssl spring

Last synced: 12 Mar 2026

https://github.com/idhamm15/p10-cryptography

Cryptography Application With Java Programming

application-java cryptography java

Last synced: 14 Mar 2025

https://github.com/incertia/crypto-primer

intro to crypto given to my coworkers at AIS

algebra algebraic-structures cryptography dh diffie-hellman ecc ecdh rsa

Last synced: 18 Jan 2026

https://github.com/abdo-essam/diffie-hellman-key-exchange

The code you provided appears to be an implementation of the Diffie-Hellman key exchange protocol between a client and a server. This protocol allows two parties to establish a shared secret key over an insecure channel.

client client-server cryptography diffie-hellman diffie-hellman-algorithm diffie-hellman-key server

Last synced: 15 Mar 2025

https://github.com/yumevote/voting-iot-machine-ui

A emulated GUI application which acts as a POS IOT Machine (DRE) to allow people to vote for election on the Maschain

arduino cryptography iot python tkinter-gui

Last synced: 15 Feb 2026

https://github.com/PRoplayer282828/CryptoTrader

bitcoin btc crypto crypto-bot crypto-helper crypto-tools crypto-trading crypto-wallet cryptocurrencies cryptocurrency cryptography cryptotrade cryptotrader nft not notcoin ton toncoin trc usdt

Last synced: 11 Mar 2025

https://github.com/ashu11-a/ashcrypt

Files protected with encryption

aes aes-256 aes-cipher aes-encryption aes-gcm asynchronous-crypto buffer crypto crypto-library crypto-tools cryptography encryption gcm node-aes node-crypto nodejs pbkdf2 stream-encryption typescript

Last synced: 24 Apr 2026

https://github.com/mateusjssilva/digital-envelope

Implementation of a Digital Envelope system, which allows the protection and secure transmission of files through encryption.

cryptography envelope-encryption java secure

Last synced: 24 Apr 2026

https://github.com/amdevit/hoddmir

Hoddmir is a library that implements cryptographic helpers using managed .NET APIs and well-known cryptographic libraries to provide classes with useful tools for third-party applications, such as easy-to-use secure storage or in-memory password vaults.

aead cryptography dotnet secure-storage security store

Last synced: 12 Apr 2026

https://github.com/andrewrgarcia/aesus

Word-based AES-256 encryption tool in Rust — for secrets too stylish for gibberish.

aes aes256 cli cryptography encryption passphrase privacy rust security tools

Last synced: 20 Jan 2026

https://github.com/fabiocolacio/crypt

Easily encrypt and decrypt files from cli or scripts

cryptography

Last synced: 09 Oct 2025

https://github.com/Anja20/Crypto-Calculator

btc crypto crypto-bot crypto-market crypto-tools crypto-trading crypto-wallet cryptocurrencies cryptocurrency cryptography nft not notcoin ton toncoin trc tron usdt

Last synced: 11 Mar 2025

https://github.com/natharyan/secret-sharing-arithmetic-operations

Shamir's secret sharing to generate shares for arithmetic operations over two secrets.

cryptography cryptography-project secret-sharing shamir-secret-sharing

Last synced: 09 Oct 2025

https://github.com/uofsc-fall-2022-math-587-001/homework11

Basics on elliptic curves and their discrete log problem

cryptography discrete-logarithms elliptic-curves go latex math

Last synced: 14 May 2026

https://github.com/4lessandrodev/cesar-cipher

A simple TypeScript library for Caesar cipher encryption and decryption

cesar-cipher cryptography shift-cipher

Last synced: 30 Jan 2026

https://github.com/goseind/kryptolearn

Krypto Learn - Grundlegende Konzepte der Kryptographie lernen und verstehen

cryptography expo javascript kryptografie react react-native

Last synced: 22 Feb 2026

https://github.com/gatanegro/unify-theory

unifies spacetime, matter, and forces in Oscilatorry Field

com cryptography dynamic math nonlinear-dynamics novel oscillatory physics theory unified

Last synced: 15 Mar 2025

https://github.com/pythoncoderunicorn/simplersa

a simple Python program to learn how RSA cryptography works

cryptography python3 rsa

Last synced: 24 Aug 2025

https://github.com/corocoto/asymmetric-cryptography-encrypt-decript-message

Encrypt/decrypt message via using public & private key pair

asymmetric-cryptography cryptography decrypt encrypt rsa-algorithm

Last synced: 09 Oct 2025

https://github.com/m-azra3l/passwordhashgenerator

Password hash generator in C#

cryptography csharp windows-forms winforms

Last synced: 04 Jan 2026

https://github.com/thomd/notes-on-cryptography

Notes on Cryptography

cryptography jupyter python

Last synced: 27 Apr 2026

https://github.com/jurshsmith/vaultstream

High-Performance Distributed Digital Signature System

cryptography ecdsa-key-pair golang jetstream nats-streaming postgresql

Last synced: 25 Apr 2026

https://github.com/advanced-systems/security

This library provides classes and services for symmetric and asymmetric standard cryptographic algorithms based on the .NET cryptography system.

advanced-systems cryptography

Last synced: 14 Jan 2026

https://github.com/stafmazayded83/cryptoguardian

Cryptoguardian is a secure wallet application designed to protect your digital assets. It uses advanced encryption methods to ensure that your cryptocurrencies remain safe from unauthorized access.

bitcoin crypto crypto-tools crypto-wallet cryptography github-config matplotlib nodejs pandas seaborn sha256-hash streamlit visualization walletkeytool

Last synced: 14 Apr 2026

https://github.com/cythral/identity-certificates

Signing Certificate Rotation Service for Brighid Identity.

aws cryptography dotnet

Last synced: 14 Apr 2026

https://github.com/tgalal/python-curve25519-dalek

Python extension module providing group operations on Ristretto based on curve25519-dalek.

cryptography curve25519 elliptic-curves ristretto

Last synced: 16 May 2025

https://github.com/vedbhanushali/cryptoaes

Cybersecurity Project - Repositry contains [windows and android] application which uses Symmetric - Encryption for encrypting any file

aes-encryption cryptography cybersecurity symmetric-key-cryptography

Last synced: 23 Jun 2026

https://github.com/stzyium/saltforge

A simple Python password security system using cryptographic concepts like salting, hashing, and PBKDF2.

cryptography hashing hashlib password-security python python-project salting sha256 sha256-hash

Last synced: 24 Oct 2025

https://github.com/harmim/vut-kry-project2

Cryptography - Project - RSA

asymmetric-cryptography crypto cryptography cryptology cypher encryption-decryption factorization factorization-attack kry prime-generator public-private-key rsa rsa-algorithm vut vut-fit

Last synced: 31 Mar 2025

https://github.com/elliotwutingfeng/secret_broadcast

Send encrypted webcam snapshots over Telegram to specific users.

cryptography fernet telegram webcam

Last synced: 20 Oct 2025

https://github.com/zzemlyanaya/pythonedu

Репозиторий с учебными заданиями на языке Python

aes-encryption cryptography decorators dns-cache generators graph imap iterators multithreading python regex risc-v riscv-emulator smtp sntp sorting-algorithms traceroute

Last synced: 26 Aug 2025

https://github.com/skygenesisenterprise/crux-256

CRUX-256: Experimental symmetric block cipher combining SPN and ARX architectures

aes-256 api-service cryptography database dns linux macos mail rust windows

Last synced: 14 Apr 2026

https://github.com/virgilsecurity/virgil-pythia-net

Virgil Pythia SDK allows developers to implement Pythia protocol to create breach-proof passwords, immune to offline and online attacks.

breach-proof-password cryptography encryption netcore pythia pythia-sdk sdk virgil-pythia

Last synced: 02 Sep 2025

https://github.com/ntdls/nasccl

NetworkDLS Algorithmic Symmetric Cipher Cryptography Library

cryptography encryption library

Last synced: 25 Apr 2026

https://github.com/rancoud/crypt

Crypt Package

argon2i argon2id bcrypt composer coverage crypt cryptography hash packagist php php74 php8 php80 php81 phpunit phpunit9

Last synced: 09 Apr 2025

https://github.com/islam-hady9/image-encryption-and-steganography-with-des_and_lsb

An image encryption and steganography project implementing DES encryption and LSB techniques for secure image embedding and transmission.

cryptography decryption des encryption image-processing jupyter-notebook lsb python steganography

Last synced: 25 Apr 2026

https://github.com/innovativeinventor/cryptart

A way to easily verify files, keys, and other data using art(words, sounds, images)

cryptography hashing security-tools

Last synced: 27 May 2026

https://github.com/thesupercd/rainbow_table_builder

A high performance CUDA-based GPU accelerated Rainbow-Table maker, written in C++ without any external libraries or dependencies needed.

cpp cryptography cuda hash-table hashing parallel-processing rainbow-table sha3 sha3-512 uuid

Last synced: 12 May 2026

https://github.com/imnotannamaria/python-flask-auth

Flask User Authentication and CRUD API

cryptography flask pymysql python

Last synced: 25 Apr 2026

https://github.com/pieroboseta/filenfile

filenfile is a Python application that securely hides and extracts files and folders within a main file of your choice using encryption and compression techniques, providing a simple and efficient way to store sensitive data discreetly.

compression cryptography data-hiding data-security file-archiving file-encryption file-security hidden-files hide lzma-compression metadata-encryption python-application python-gui python-script secure-storage tkinter

Last synced: 01 Apr 2025

https://github.com/innovativeinventor/vig-xts

An implementation of the Vigenere cipher with ciphertext stealing in Go

cryptography go golang vigenere-cipher xts

Last synced: 09 Jun 2026

https://github.com/tigeryant/cryptopals-challenges

Solutions to the cryptopals cryptography challenges

coding-challenges cplusplus cryptography cryptopals

Last synced: 16 Jun 2026

https://github.com/rstacks/downunderctf2024-writeup

Writeups for the challenges I attempted at DownUnderCTF 2024.

cryptography ctf ctf-writeups forensics osint reverse-engineering web-exploitation

Last synced: 13 Apr 2026

https://github.com/salvacorts/fr-chat-resttracker

:satellite: P2P Chat Rest Server Tracker

cryptography heroku hug p2p-chat python rest-api tracker-server

Last synced: 15 Mar 2025

https://github.com/sutterseba/sutterseba

bitcoin cryptography

Last synced: 11 Jun 2026

https://github.com/cullis-security/cullis

Trust infrastructure for AI agents across organizations. Verified identity, explicit authorization, cryptographic audit trail.

ai-agents api-gateway cryptography dpop e2e-encryption fastapi federated-identity iam mcp mtls multi-agent-systems pki python self-hosted spiffe trust-broker workload-identity zero-trust

Last synced: 13 May 2026

https://github.com/deviant101/side-channel-attacks-countermeasures

Implementation of timing and power analysis side-channel attacks on AES encryption with effective countermeasures and security analysis.

cryptography information-security infosec-project power-analysis python security-analysis side-channel-attacks timing-attack

Last synced: 29 Jun 2025

https://github.com/seniorbatleo/cryptocart

Secure chat software for your computer.

chat cryptocart cryptography messaging secure security

Last synced: 24 Jun 2026

https://github.com/karisdalton/ceaser-cipher

Cipher encoder and decoder---ceaser cipher

cryptography encryption

Last synced: 15 Mar 2025

https://github.com/mrtnetwork/monero_dart

A pure Dart solution for Monero cryptography, supporting RingCT transactions, Bulletproof Plus, multi-sig accounts, account management, and full daemon/wallet RPC support.

cryptography dart flutter monero monero-wallet ringct xmr

Last synced: 26 Dec 2025

https://github.com/project-aico/dna

Transcription between UTF-8 text and DNA bases.

bioinformatics cryptography dsl python yaml

Last synced: 20 Jan 2026

https://github.com/inanepain/id-forge

A lightweight, versatile PHP library for generating and encoding unique identifiers. It supports base32, base58, base64, nanoid, snowflakeid, uuid, and ulid, providing fast, secure, and flexible solutions for ID generation and encoding in modern applications.

base32 base58 base64 cryptography encoding id-forge id-generation inanepain library nanoid php snowflakeid ulid unique-identifier uuid

Last synced: 14 Jan 2026

https://github.com/hexylena/poem-code

"The poem code is a simple, and insecure, cryptographic method which was used during World War II by the British Special Operations Executive (SOE) to communicate with their agents in Nazi-occupied Europe." - Wikipedia

cryptography historical-cipher

Last synced: 22 Aug 2025

https://github.com/jchambers/java-noise

A Java implementation of the Noise Protocol Framework

cryptography java noise noise-protocol noise-protocol-framework security

Last synced: 26 Apr 2026

https://github.com/moosesue/extended-gcd

Extended GCD algorithm in Python and Rust

cryptography cryptography-algorithms extended-gcd gcd number-theory python rust rust-lang

Last synced: 27 Apr 2026

https://github.com/santiellena/cryptopals

My solutions to Cryptopals challenges (http://cryptopals.com/) written in Rust

cryptography rust-lang security

Last synced: 07 Jun 2026

https://github.com/nthparty/exclusive

Data structure for representing secret shares of byte vectors based on bitwise XOR, designed for use within secure multi-party computation (MPC) protocol implementations.

cryptography linear-secret-sharing mpc multi-party multi-party-computation multiparty multiparty-computation python-cryptography secret-sharing secret-sharing-protocols secret-sharing-scheme secure-multi-party-computation secure-multiparty-computation

Last synced: 16 Jan 2026

https://github.com/mohith6/certificate-broadcast

Broadcasting certificates to the clients over HTTP and HTTPS protocols and validating client's certificate over HTTPS using mutual SSL authentication

certificates cryptography digitalsignature java publickey-authentication rsa-encryption

Last synced: 29 Jul 2025

https://github.com/oxarbitrage/salsa20

Attempt to formalize salsa20 in lean

cryptography lean mathlib salsa20

Last synced: 11 Jul 2025

https://github.com/swapnilraj/groupie-wellman

cryptography diffie-hellman-algorithm key

Last synced: 10 Apr 2025

https://github.com/jaymoneyjay/spring21-automated-decryption

Automated decryption of classical ciphers with neural networks.

cryptography neural-networks python security

Last synced: 17 Aug 2025

https://github.com/casz92/ntru_falcon

NIF C library for Elixir, implementing the post-quantum cryptography algorithm Falcon

cryptography elixir ntru post-quantum-cryptography

Last synced: 16 May 2026

https://github.com/trinetra110/chronocrypt

ChronoCrypt is a powerful CLI-based encryption tool that allows users to create time-locked secure notes that self-destruct after a specified duration. It uses AES-256 encryption (CBC mode) to securely store sensitive information, ensuring that notes are unreadable beyond their expiry time.

cryptography cybersecurity-tools secure-delete

Last synced: 25 Jul 2025