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: 2026-07-06 00:07:00 UTC
JSON Representation

https://github.com/silent0wings/hybrid-caesar-cipher-encryption-system

EncryptionThe Hybrid Caesar Cipher Encryption System is a Java-based encryption tool that extends the classic Caesar cipher by incorporating multiple scrambling, shuffling, and shifting algorithms. This hybrid approach enhances the security of the encryption process.

caesar-cipher caesarcipher cipher cryptography cybersecurity data-protection data-security encryption hybrid-encryption information-security java security security-algorithm symmetric-encryption

Last synced: 12 Jun 2026

https://github.com/frostbyte012/cryptography-network-security-lab-assignment-nit-sikkim

This repo is all about the cryptography techniques that we use in our daily lives

cryptography encryption-algorithms encryption-decryption network-security python3

Last synced: 26 Jun 2025

https://github.com/filiprokita/tosha256

This is a Python script that prompts the user to enter a string of text and then calculates its SHA-256 hash using the hashlib library. The resulting hash is then printed to the console.

cryptography data-integrity hash hashing python security sha256 tosha

Last synced: 24 Mar 2025

https://github.com/hashlag/genc

Command line file encryption tool in GoLang

cryptography golang

Last synced: 12 Jul 2025

https://github.com/adrianklessa/aes

A simple, educational implementation of AES w/ CBC mode of operation

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Last synced: 12 Oct 2025

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

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Last synced: 12 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/viral32111/scrambler

A program to hide & protect messages for enhanced privacy.

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Last synced: 09 Apr 2025

https://github.com/minomy13/rsa

C++ code for en- and decrypting RSA.

cryptography decoding encoding rsa

Last synced: 13 Oct 2025

https://github.com/kevin-doolaeghe/key_keeper

Sauvegarde de mots de passe avec chiffrement très simple

console-application cryptography personnal-project

Last synced: 23 Feb 2026

https://github.com/johanns/ref-secure-share

SecureShare is a tutorial and reference implementation of a one-time-use message sharing web-app, developed using Next.JS 14, TypeScript, Prisma, and styled with Tailwind CSS

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Last synced: 05 Feb 2026

https://github.com/ia/crypto

crypto means cryptography

base64 challenges cryptography perl xor

Last synced: 11 Feb 2026

https://github.com/acmo0/lfsr-fibo

Efficient pure Rust implementation of LFSR in Fibonacci representation

cryptography lfsr lightweight-cryptography random-generation

Last synced: 14 Oct 2025

https://github.com/labgua/rsa_start

Imparare l'uso della crittografia RSA con semplici esempi

cryptography rsa teaching-materials

Last synced: 22 Jan 2026

https://github.com/a-s-russo/eleventh-hour-mystery

Decipher the paragraph of ciphertext in 'The Eleventh Hour: A Curious Mystery' by Graeme Base at the end of the book using a Caesar cipher

caesar-cipher cryptography

Last synced: 29 May 2026

https://github.com/c14it0n/torgeforge

🔥 Generador de alto rendimiento de direcciones .onion v3 personalizadas para Tor con interfaz interactiva

cli-tool cryptography ed25519 hidden-service onion privacy rust security tor vanity-address

Last synced: 13 Jun 2026

https://github.com/bkawk/aes-256-cbc-pbkdf2-30k

Polymer2 Web Component for encrypting and decrypting a mnemonic to the CBC encryption mode of AES

aes-cbc cryptography pbkdf2 polymer2

Last synced: 24 Jan 2026

https://github.com/mizcausevic-dev/hash-attestation-rs

Sign + verify Kinetic Gain Protocol Suite docs using ed25519 over canonical JSON hashes. The missing 'this AEO actually came from the vendor' layer.

attestation canonical-json cryptography dalek ed25519 kinetic-gain rust signature

Last synced: 01 Jun 2026

https://github.com/iphydf/toxcore

Fork of toxcore that's not a github fork

cryptography encryption network p2p security toxcore

Last synced: 18 Apr 2026

https://github.com/autodidaddict/nkeys-hs

Haskell library for encoding and decoding ed25519 keys for the NATS ecosystem

cryptography ed25519 nats nkeys

Last synced: 14 Jun 2026

https://github.com/aaditya29/python-programmes

ciphers cryptography python

Last synced: 01 Apr 2025

https://github.com/theognis1002/password-generator-cli

A simple password generator CLI tool

cryptography python3

Last synced: 01 Jun 2026

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

🔒 Personal take on the cryptopals crypto challenges, in Go

cryptography cryptopals-challenges go golang

Last synced: 14 Feb 2026

https://github.com/greydevv/sha-256

A C implementation of the 256-bit Secure Hash Algorithm (SHA-256).

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Last synced: 20 Oct 2025

https://github.com/moeenn/go-token

Generate crypto-random strings (i.e. tokens) of any length

crypto-random-string cryptography go golang token

Last synced: 11 Mar 2026

https://github.com/jonas089/toyni

Toyni Stark

contributor-friendly cryptography fri modular rust stark zero-knowledge

Last synced: 20 Oct 2025

https://github.com/emorilebo/mobile_secrets_vault

Secure secrets management for mobile backend applications with encryption, versioning, and audit logging

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Last synced: 27 Jan 2026

https://github.com/daisvke/dcrypt

dcrypt is a file encryption/decryption tool that adds a custom header to encrypted files, storing essential metadata for decryption and management of the encrypted content.

aes-128-cbc c cryptography encryption-decryption keygen

Last synced: 25 Mar 2025

https://github.com/rishabhsingh2510/basic-cryptography

Cryptography

cipher cryptography decoding encoding python tkinter user-interface

Last synced: 11 Jun 2025

https://github.com/jdanielescanez/qkd-sampler

A Rust CLI tool for simulating Quantum Key Distribution (QKD) protocols, including BB84, Six-State, and B92. This crate provides a flexible and efficient way to simulate quantum key exchange, analyze security metrics, and evaluate the impact of eavesdropping.

b92 bb84 cryptography qkd quantum six-state

Last synced: 15 Jun 2026

https://github.com/lapets/pailliers

Minimal pure-Python implementation of Paillier's additively homomorphic cryptosystem.

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Last synced: 06 Feb 2026

https://github.com/gabrielmajeri/crypto-data-structures

Data structures in Rust for cryptocurrencies and blockchain-related technologies

blockchain cryptocurrency cryptography merkle-tree

Last synced: 08 Apr 2025

https://github.com/simonmasson/efficient-glv-curves-generation

Generation of efficient four-dimensional GLV curves with high security (256-bit)

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Last synced: 11 Jun 2025

https://github.com/anseki/gulp-gnirts

Obfuscate string literals in JavaScript code.

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Last synced: 20 Jan 2026

https://github.com/hrichharms/rc4

RC4 implemented in C

cryptography rc4 rc4-algorithm rc4-cipher rc4-encryption

Last synced: 08 Apr 2025

https://github.com/tdiprima/cryptography

Testing crypto.js

cryptography nodejs

Last synced: 25 Oct 2025

https://github.com/hsson/ring

Automated rotation of RSA signing keys

cryptography key-rotation rsa

Last synced: 18 Mar 2025

https://github.com/3qnrpdwd/project-eternal_nightmare

for portfolio material ransomware

aes cryptography encryption-decryption python ransomware rsa

Last synced: 25 Oct 2025

https://github.com/sudoferraz/http-python-server

A Distributed HTTP python fileserver that uses Apache Thrift to comunicate with a node in any language

apache cryptography distributed thrift

Last synced: 26 Oct 2025

https://github.com/pedroalbanese/leacrypt

TTAK.KO-12.0223 Lightweight Encryption Algorithm (ISO/IEC 29192-2:2019) with Galois/Counter Mode (LEA-GCM)

aead cryptography golang lea symmetric-encryption

Last synced: 16 Jun 2026

https://github.com/zukardex/zeryto

Zeryto- an amateur cryptosystem experiment

cryptography

Last synced: 04 Jul 2026

https://github.com/latticearc/latticearc

Hybrid Post-Quantum Cryptography Library for Rust - Secure transition to Quantum-Safe Encryption.

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Last synced: 27 May 2026

https://github.com/bmeneg/lapwing

Lightweight crypto algorithms library for highly resource-constrained devices.

c clibrary cryptography embedded

Last synced: 24 Mar 2025

https://github.com/jonath-z/go-vigenere-cipher

Vigenere Cipher algorithm written in go

cipher-algorithms cryptography go golang vigenere-cipher-algorithm

Last synced: 01 Apr 2025

https://github.com/joe-degs/digcoin

How i think bitcoin works in a way... I don't really know what I'm doing. But it feels good.

cryptocurrency cryptography distributed-systems golang

Last synced: 11 Jun 2025

https://github.com/godaddy/asherah-ffi

Application-layer envelope encryption with automatic key rotation. Rust core with bindings for Node.js, Python, .NET, Java, Ruby, and Go.

cryptography dotnet encryption envelope-encryption ffi go java key-rotation nodejs python ruby rust security

Last synced: 28 Apr 2026

https://github.com/asjordi/basicjavablockchain

Simple Java Blockchain

blockchain blockchain-demos cryptography java

Last synced: 24 Mar 2025

https://github.com/midnight-wonderer/xoodyak-rb

A blazing fast Ruby wrapper for the Xoodyak cryptographic scheme. Supports hashing and AEAD encryption.

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Last synced: 28 May 2026

https://github.com/zeraphie/passwordgen

Simple class for cryptographically strong secure password generation

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Last synced: 06 May 2026

https://github.com/m-torhan/securechat

Secure chat using double ratchet algorithm.

cryptography python

Last synced: 25 Feb 2026

https://github.com/quantumcoinproject/hybrid-pqc

Hybrid Post Quantum Cryptography

cryptography post-quantum-cryptography

Last synced: 01 Feb 2026

https://github.com/filiprokita/pwdgen

Simple command-line utility to generate a random password of specified length.

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Last synced: 07 Feb 2026

https://github.com/schlopp96/mycaesarcipher

Substitution-based cryptographic cipher for encoding plaintext. Works with alphanumeric characters.

caesar-cipher caesar-cipher-algorithm caesar-shift cipher cryptography decode decryption encode encoder-decoder encryption python python-script python3 shift-cipher

Last synced: 08 Feb 2026

https://github.com/nicolocarcagni/swallet

A modern, non-custodial desktop wallet for the SOLE cryptocurrency, built with Python, GTK4, and libadwaita.

cryptography gtk4 gtk4-python3 unisalento wallet

Last synced: 10 Mar 2026

https://github.com/seiyakobayashi/seiyakobayashi.github.io

Personal website for blogging

blockchain cryptography ethereum web3

Last synced: 08 Feb 2026

https://github.com/systemslibrarian/crypto-lab-shor

Browser-based Shor's algorithm simulation — modular exponentiation period finding, QFT probability distribution, continued fractions, factor extraction. The reason RSA, ECC, and Diffie-Hellman need replacing. No backends. No simulated shortcuts — the number theory is real.

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Last synced: 01 Jun 2026

https://github.com/quintessence-sec/pgp-mfa

proof-of-concept to use pgp as a MFA method

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Last synced: 03 Sep 2025

https://github.com/systemslibrarian/crypto-lab-hawk

Browser-based educational demo of HAWK — the only lattice-based candidate in NIST's Round 2 Additional Signatures process. Integer-only arithmetic, discrete Gaussian sampling over Z with fixed tables, no rejection loop. Side-by-side with Falcon and ML-DSA.

constant-time crypto-lab cryptography digital-signatures discrete-gaussian-sampling falcon hawk hawk-signatures integer-only lattice-cryptography lattice-isomorphism-problem lattice-signatures ml-dsa module-lip nist-additional-signatures nist-round-2 post-quantum-cryptography

Last synced: 01 Jun 2026

https://github.com/systemslibrarian/crypto-lab-noise-pipe

Browser-based Noise Protocol Framework demo — NN, XX, IK, and IKpsk2 handshake patterns with real X25519 arithmetic, live transport encryption, and a WireGuard deep dive. No backends. No simulated math.

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Last synced: 01 Jun 2026

https://github.com/systemslibrarian/crypto-lab-mac-race

Browser-based MAC demo — HMAC, CMAC, Poly1305, and GHASH compared with live length extension attack, timing attack, and nonce reuse demonstrations. Real WebCrypto operations. No backends. No simulated math.

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Last synced: 01 Jun 2026

https://github.com/zerdicorp/hashalgo

Second Attempt to Understand Hashing.

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Last synced: 02 Apr 2025

https://github.com/systemslibrarian/crypto-lab-paillier-gate

Browser-based Paillier cryptosystem demo — Pascal Paillier's 1999 additive homomorphic encryption. Encrypt, decrypt, homomorphic addition without decrypting. Private 10-voter election simulation and 5-hospital patient aggregation. The primitive underlying GG20 threshold ECDSA, Helios voting, and ElectionGuard. No backends. No simulated math.

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Last synced: 01 Jun 2026

https://github.com/systemslibrarian/crypto-lab-padding-oracle

Browser-based CBC padding oracle attack demo — full Vaudenay 2002 chosen-ciphertext attack with real AES-CBC, byte-by-byte plaintext recovery, and coverage of ASP.NET, Lucky Thirteen, and POODLE exploits. No backends. No simulated math.

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Last synced: 01 Jun 2026

https://github.com/timyiu478/pwn.college

Learn to Hack in a hands-on fashion

binary-exploitation cryptography hacking network-security reverse-engineering system-security web-security

Last synced: 09 Feb 2026

https://github.com/systemslibrarian/crypto-lab-rsa-forge

Browser-based RSA demo — textbook RSA, OAEP, PSS signatures, and live attacks including small exponent, Bleichenbacher PKCS#1 v1.5 oracle, and padding oracle. Real WebCrypto operations. No backends. No simulated math.

asymmetric-encryption attacks bleichenbacher browser crypto-lab cryptography padding-oracle pkcs1 post-quantum public-key-cryptography rsa rsa-oaep rsa-pss typescript vite

Last synced: 01 Jun 2026

https://github.com/systemslibrarian/crypto-lab-ratchet-wire

Browser-based demo of the Double Ratchet Algorithm — the cryptographic protocol powering Signal, WhatsApp, and Google Messages. Live conversation with forward secrecy, break-in recovery, and key compromise simulation.

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Last synced: 01 Jun 2026

https://github.com/systemslibrarian/crypto-lab-mceliece-gate

Browser-based Classic McEliece demo — the oldest post-quantum KEM (1978), binary Goppa codes, visceral 261KB public key visualization, and four-way comparison against ML-KEM, BIKE, and HQC. No backends. No simulated math.

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Last synced: 01 Jun 2026

https://github.com/systemslibrarian/crypto-lab-model-breach

Browser-based HiAE threat model case study — AESL, Theorem 1 candidate enumeration, MITM state recovery, byte decomposition, guess-and-determine key recovery. Security claims are contracts. The threat model is the fine print. No backends. No simulated math.

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Last synced: 01 Jun 2026

https://github.com/systemslibrarian/crypto-lab-dilithium-seal

Browser-based demo of ML-DSA (CRYSTALS-Dilithium), the lattice-based post-quantum digital signature scheme standardized as NIST FIPS 204 in August 2024. Sign, verify, and seal documents — quantum-resistant.

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