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: 2026-07-01 00:06:48 UTC
JSON Representation

https://github.com/transferwise/crypto

Crypto helper modules

crypto cryptography vault

Last synced: 09 Apr 2025

https://github.com/8hantanu/cryp2o

Watermark based image encryption

cryptography dct rsa

Last synced: 11 Aug 2025

https://github.com/nexenio/rxkeystore

RxJava wrapper for the Android keystore and cryptography utilities

android android-library cryptography rxjava

Last synced: 19 May 2026

https://github.com/jnm2/threshold

Paper backup requiring a chosen K of N pieces to decrypt. Useful for storing passwords, private keys for PGP or Bitcoin, recovery codes, secret instructions, and small files. Work in progress.

backup bitcoin cross-platform cryptography csharp digital dotnet-core encrypt paper password pgp print private-key redundancy secret-sharing security shamir threshold wallet

Last synced: 10 May 2026

https://github.com/mrcarb0n/zipsignerust

High-performance, memory-safe cryptographic signing and verification for Android ZIP archives.

android apk cryptography jar rust signing tool verification zip

Last synced: 24 May 2026

https://github.com/cizr/hill-adn-cryptography-bridging-classical-ciphers-with-dna-based-encryption

The Hill-ADN Cryptography project combines Hill cipher methods with DNA encryption, offering a novel approach for improved data security. It includes binary to DNA conversion, amino acid translation, and Hill cipher encryption, with the decryption process addressing genetic code ambiguity challenges.

bioinformatics cryptography data-security dna encryption-decryption genetic-algorithms genetic-code hill-cipher

Last synced: 07 Oct 2025

https://github.com/dinochiesa/apigee-custompolicy-rsacrypto

This is a custom Apigee policy, implemented in Java, that performs RSA Encryption and Decryption of data or message payloads, or RSA signing of data or message payloads, or verification of such signatures.

apigee cryptography rsa

Last synced: 10 Jun 2025

https://github.com/aadityaa2606/cryptography-and-network-security

Contains multiple cryptographic encryption algorithms with TCP client server model

client-server cryptography encryption-algorithms encryption-decryption

Last synced: 29 Oct 2025

https://github.com/jitendragangwar123/ekolance-solidity-cohort-2

This repository contains Solidity programming exercises that were discussed during the Ekolance Solidity Cohort 2. It serves as a resource for learning and practicing Solidity, a programming language used for developing smart contracts on blockchain platforms like Ethereum.

blockhain-tecnology cryptography ethereum solidity

Last synced: 07 Jan 2026

https://github.com/thotypous/keccak-bsv

Bluespec SystemVerilog implementation of the Keccak primitive (SHA-3)

bluespec cryptography hardware-designs keccak sha3

Last synced: 19 Mar 2026

https://github.com/charlot-dedjinou/best-flag

Best Flag is an exciting project that will put your cryptographic and steganographic skills to the test. The aim is to discover a secret message hidden in the “best_flag” file, using different encryption algorithms.

cryptography express expressjs flag mongodb react reactjs steganography tailwind tailwindcss

Last synced: 11 Apr 2026

https://github.com/messagemedia/webhooks-demo

Set of scripts to demonstrate the use of MessageMedia's webhooks

cryptography messaging sms webhooks

Last synced: 02 Apr 2025

https://github.com/spiretechnology/go-jwt

JSON Web Token library in Go

authentication cryptography jwt sessions verification

Last synced: 31 Jan 2026

https://github.com/marcode24/criptografia-rsa

🔐 This is a cryptography project testing, using RSA criptography

cryptography css html html-css-javascript html5-css3 javascript multer nodejs rsa rsa-cryptography

Last synced: 11 Apr 2026

https://github.com/ngirimana/rsa

RSA algorithm is asymmetric cryptography algorithm. Asymmetric actually means that it works on two different keys i.e. Public Key and Private Key. As the name describes that the Public Key is given to everyone and Private key is kept private.

cryptography css3 html5 network-security rsa

Last synced: 07 May 2026

https://github.com/anvilco/node-encryption

RSA and AES Encryption helpers

aes cryptography encryption js node rsa

Last synced: 04 Jul 2025

https://github.com/newyaroslav/crypto-json

C ++ library for JSON encryption with COMMENTS

cryptography json json-parser strip-json-comments

Last synced: 15 May 2026

https://github.com/h-alice/python-ecc-keyexchange

A simple PoC for ECC key exchange in Python.

cryptography elliptic-curve-cryptography python security

Last synced: 12 Oct 2025

https://github.com/obaskly/anonymouschat

Secure Anonymous Chat

chat cryptography end-to-end-encryption flask python rsa

Last synced: 19 Jan 2026

https://github.com/belajarqywok/strmc

Credentials Management Tool Using Stream Cipher Algorithm.

clang cryptography cybersecurity llvm rc4-algorithm stream-cipher

Last synced: 07 Feb 2026

https://github.com/shurlinet/go-clatter

Post-quantum Noise protocol framework for Go. NQ, PQ (ML-KEM), Hybrid, DualLayer handshakes. ML-DSA-65 + SLH-DSA signing (FIPS 203/204/205). 90 patterns, 18 SLH-DSA param sets (SHA2/SHAKE/BLAKE3). Verified against Rust Clatter + NIST ACVP vectors.

blake3 cryptography digital-signatures fips-205 go golang kem key-exchange ml-dsa ml-dsa-65 ml-kem noise noise-protocol post-quantum pqc pqnoise quantum-resistant slh-dsa slhdsa x25519

Last synced: 29 Jun 2026

https://github.com/shreyansh26/secure-voting-application

Secure Voting Protocols using RSA

cryptography rsa secure-voting voting-system

Last synced: 22 Jun 2026

https://github.com/gotz1480/bitcoin-cryptography-ecc

Study of bitcoin elliptic curve cryptography (ECC)

bitcoin cryptography ecc-cryptography elliptic-curve-cryptography

Last synced: 07 Apr 2025

https://github.com/crnobog69/polychaos

PolyChaos 🔐 | систем шифровања - encryption system

cryptography encryption encryption-decryption python secure security security-tools simple simple-app simple-project

Last synced: 06 Feb 2026

https://github.com/gotz1480/cryptography

Cryptography projects and algorithms in Python

cryptography cryptography-algorithms cryptography-library python python-cryptography python3

Last synced: 07 Apr 2025

https://github.com/mohitrajain/rootctf

CTF ( Capture the flag a cyber security event ) .

cryptography ctf forensics pwning reverse-engineering steganography system-administration web-exploitation

Last synced: 13 Oct 2025

https://github.com/lovasoa/sha_hashes

Collection of sha hashes of common passwords

cracking cryptography security sha1 website whitehat

Last synced: 28 Jan 2026

https://github.com/mashatan/go-cryptoconditions

Crypto-Conditions in Go

cryptoconditions cryptography golang-package

Last synced: 14 Jan 2026

https://github.com/tangle-network/anonima

A threshold signature oracle node.

cryptography

Last synced: 14 Sep 2025

https://github.com/icaropires/cryptography

aes cryptography data-encryption-standard digital-signature elliptic-curves golang pseudo-random-generator

Last synced: 26 May 2026

https://github.com/kingmob/cryptopals-crypto-challenges

The Cryptopals (formerly Matasano) crypto challenges

clojure crypto-challenges cryptography cryptopals

Last synced: 27 Oct 2025

https://github.com/hmasila/crypto-php

crypto cryptocurrencies cryptocurrency cryptocurrency-exchanges cryptography

Last synced: 13 Oct 2025

https://github.com/defucc/hashkeys

Reactive Noble cryptography for p2p identity

composable cryptography encryption js noble-curves signing vue

Last synced: 20 Jan 2026

https://github.com/dylan-lang/hash-algorithms

Cryptographic hash functions for Dylan

cryptography dylan-lang hash hashing

Last synced: 03 Feb 2026

https://github.com/w3c/identity-web-impact

This document proposes an overview of Digital Identities on the Web and an analysis through different use cases of the systemic impact on both the market side and the human side, as well as the role that Web standardization may play in managing that impact

cryptography identity spice threat-modeling verifiable-credentials

Last synced: 11 Jul 2025

https://github.com/eliainnocenti/cryptography-exercises

Exercises for Cryptography Exam @ Polito - Cryptographic primitives in C with OpenSSL and prototype attacks in Python.

asymmetric-cryptography c cryptography ctf digest encryption-decryption offensive-security openssl python rand random-number-generators random-numbers symmetric-cryptography

Last synced: 05 May 2026

https://github.com/demindiro/nora_ssh

Pure Rust async library for SSH servers and clients

async async-rust cryptography encryption rust ssh ssh-client ssh-server

Last synced: 01 Apr 2025

https://github.com/simplito/linked-pm

A simple web application which encrypts your private messages (Java Script client-side encryption) and converts them into clickable links and QR-codes.

application cryptography qrcode web

Last synced: 04 Mar 2025

https://github.com/spyder01/charlotte

Folder encryption and decryption tool built with Scala

cli cryptography encryption fileencryption scala software-engineering

Last synced: 10 Aug 2025

https://github.com/nsk89/netcrypt

simplifying socket data stream cryptography using RSA public keys and AES data encryption, using PyCryptodome cryptographic primitives

aes-encryption cryptography network-secuirty pycryptodome python python3 rsa-encryption socket-communication

Last synced: 25 Aug 2025

https://github.com/cipherstash/enveloperb

Ruby bindings for the envelopers envelope-encryption library

cipherstash cryptography encryption envelope-encryption ruby

Last synced: 07 May 2025

https://github.com/milliorn/cli-password-generators

Simple command-line applications for generating passwords

chalk cli cli-app clipboardy command-line command-line-interface commander cryptography golang node node-js nodejs npm password password-generator random-seed randomization secure-password text-processing user-interface

Last synced: 11 Jan 2026

https://github.com/aman-17/rabin-cryptosystem

Implementation of Rabin PKC in python

cryptography encryption python rabin-cryptosystem

Last synced: 20 Mar 2025

https://github.com/geeknik/qrypttalk

A Decentralized, Privacy-First Chat App

chat crypto cryptography encryption privacy

Last synced: 08 May 2026

https://github.com/hushos/hushos-legacy

An open source, privacy first, end-to-end encrypted productivity OS!

cryptography encryption end-to-end-encryption nextjs privacy self-hosted typescript

Last synced: 21 Jun 2026

https://github.com/can-deliktas/passforge

PassForge is a flexible and secure password generator that creates strong, customizable passwords with letters, numbers, and special characters. It ensures quick and reliable password generation for enhanced security.

cryptography cybersecurity gui pass password password-generator passwords python random-password-generator safe terminal-graphics tkinter-gui

Last synced: 09 Mar 2026

https://github.com/blackm0re/pyotp2289

A pure Python implementation of "A One-Time Password System" - RFC-2289

2289 cryptography freebsd otp password python security unix

Last synced: 21 Aug 2025

https://github.com/ggeorgovassilis/webencryption

Simple (offline) HTML and Javascript for encrypting stuff

cryptography javascript security web

Last synced: 05 Apr 2025

https://github.com/fajarkim/node-openssl-enc

A Node.js CLI tool and library for encryption and decryption with OpenSSL Enc.

cipher compress cryptography decipher decompress decrypt encrypt node nodejs

Last synced: 28 Oct 2025

https://github.com/mateoniksic/project-encrypted-chatroom

client-server chatroom using ecdsa/x25519/sha256 algorithms (CODE) [ PYTHON ]

authentication chatroom client-server cryptography decryption ecdsa encryption exchange key-exchange-algorithms message python python3 sha256 x25519

Last synced: 05 Aug 2025

https://github.com/kartmaan/filecrypt

Python script to encrypt and decrypt files

aes aes-128 argparse argparser command command-line cryptography cryptography-library cryptography-tools decryption encryption encryption-decryption fernet files script sha-256

Last synced: 15 Jun 2025

https://github.com/guilherme-marcello/steganos-bmp

Toolkit to cipher&hide a message in a bitmap image file and recover

assembly-x86 bmp-image cryptography steganography system-call

Last synced: 16 May 2026

https://github.com/odilitime/sniph

Snerx Sniph Cipher

cipher cipher-algorithms ciphers cryptography cypher

Last synced: 03 Aug 2025

https://github.com/substrate-system/simple-aes

The simplest way to use AES keys in the browser or Node.

aes aes-encryption browser cryptography

Last synced: 28 Sep 2025

https://github.com/vsrc/playground

My personal sandboxed experimenting lab

bitcoin cryptocurrency cryptography golang

Last synced: 16 May 2026

https://github.com/breezy-codes/quantum-cryptography-guide

This project is an exploration into quantum mechanics and quantum cryptography. Understanding the principles and applicaitons of quantum technologies before exploring quantum algorithms for cryptography and their impact on this field. The project includes both explanations and code for learning about the field.

cryptographic-algorithms cryptography cryptography-project quantum quantum-computing quantum-computing-research quantum-crypto quantum-cryptography quantum-key-distribution quantum-mechanics shor-algorithm tutorials

Last synced: 11 Apr 2025

https://github.com/volkanbicer/theblockchain

Blockchain application created with nodejs

blockchain cryptocurrency cryptography nodejs

Last synced: 16 May 2026

https://github.com/axman6/curve25519

A Pure Haskell implementation of Curve25519

cryptography curve25519 haskell

Last synced: 28 Oct 2025

https://github.com/alokmenghrajani/five_thousand_needles

Five thousand randomly placed needles

art cryptography hardware-security-module

Last synced: 20 Mar 2025

https://github.com/skyf0l/ncenc

Netcat wrapper to encrypt network traffic with openssl.

bash cryptography encryption nc netcat network network-encryption openssl pentest pentest-tool pentesting reverse-shell rsa

Last synced: 26 Apr 2026

https://github.com/hayr-hotoca/flutter_chacha20_poly1305

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

android chacha20 chacha20-poly1305 chacha20poly1305 cipher cipher-algorithms cross-platform cryptography cryptography-algorithms dart encryption encryption-algorithms flutter ios key

Last synced: 02 May 2026

https://github.com/gusandrioli/small-aes

Simple text and PDF encrypter/hasher CLI application.

aes cryptography golang

Last synced: 15 Jan 2026

https://github.com/developpeurpascal/swap-keys-generator

A simple generator of reversible bytes lists or arrays in different programming languages for swapping from a byte value to an other.

cryptographic-algorithms cryptography cryptography-tools delphi delphi-app developer-tool developer-tools firemonkey firemonkey-applications

Last synced: 20 Jan 2026

https://github.com/scifer99/pki-engineering

PKI Engineering Repository for Secure Web Application Development

cryptography information-security informationsystems pki-applications security-engineering

Last synced: 02 Feb 2026

https://github.com/gianluca-mascolo/mylogin-cryptor

Encode/Decode mylogin.cnf

bash cryptography mylogin mysql openssl utilities

Last synced: 10 May 2026

https://github.com/karthickajan/cipherkit

77 free browser-based developer tools — AES, SHA, JWT, Base64, JSON, Regex, Diff, QR and more. 100% client-side. No login. No tracking.

aes base64 client-side cryptography developer-tools diff-checker hashing javascript json-formatter jwt-decoder no-tracking offline open-source privacy regex rsa utilities web-tools

Last synced: 30 Apr 2026

https://github.com/d0nutptr/cryptopals_solutions

My solutions to the CryptoPals problem sets.

cryptography cryptopals python python3 security

Last synced: 02 Aug 2025

https://github.com/nikhil-swamix/cryptocurrencycodes

Quick and Handy utilities for Crypto Enthusiasts traders and miners

bitcoin bitcoin-price cryptocurrency cryptography monero monero-mining

Last synced: 09 Apr 2026

https://github.com/septem151/satokencore

Java Blockchain with no external dependencies based on Bitcoin.

cryptocurrency cryptography java

Last synced: 12 May 2025

https://github.com/reznik99/go-hsm-doc

A simple CLI Tool to view, inspect and debug PKCS11 compliant Hardware and Software HSMs.

cryptography encryption-decryption golang hardware-security-module hsm pkcs11 pkcs11-tool signing-keys

Last synced: 20 Jan 2026

https://github.com/betarixm/cuecc

POSTECH: Heterogeneous Parallel Computing (Fall 2023)

cryptography ctypes cuda ecc postech secp256k1

Last synced: 12 May 2025

https://github.com/pacemakerx/cryptolab

Simple and beginner-friendly implementations of classic cryptographic algorithms like Playfair, Hill Cipher, DES, AES, RSA, DSA, MD5, SHA512 — using Python. Designed for easy understanding, minimal dependencies, and educational use.

cryptography hill-cipher md5-hash playfair-cipher rsa-algorithm sha512

Last synced: 14 Apr 2025

https://github.com/hpgrahsl/rhd-csflc-kafka-connect-demos

Demo Scenarios discussed in my Red Hat Developers article series

apachekafka cryptography encryption-decryption kafka kafka-connect security

Last synced: 18 Feb 2026

https://github.com/qua3k/cryptopals

This is a repo providing solutions written in Go to the Matasano Cryptopals Challenges.

cryptography cryptopals

Last synced: 12 Jan 2026

https://github.com/fionn/cryptopals

Attack at dawn

cryptanalysis cryptography cryptopals cryptopals-crypto-challenges matasano matasano-crypto-challenges

Last synced: 02 Mar 2025

https://github.com/dyslex7c/zk-election

Cryptography-driven and privacy-preserving election framework with zk-SNARKs

circom cryptography election voting voting-application zero-knowledge zkp zksnarks

Last synced: 03 Feb 2026

https://github.com/maxpat78/cryptopad

A simple Notepad supporting ZIP AES-256 encrypted documents, coded in Python

aes cryptography encryption notepad security text-editor zip zipfile

Last synced: 12 Apr 2025

https://github.com/ndxdeveloper/slashsum

Fast multi-threaded checksum calculator (CRC32, MD5, SHA1, SHA256, SHA512)

checksum cli-tool concurrent-processing crc32 cross-platform cryptography data-integrity file-integrity file-validation file-verification hash-calculator md5 multi-threaded parallel-computing performance rust sha1 sha256 sha512 utility

Last synced: 08 Apr 2026

https://github.com/mlh-fellowship/chamberofsecrets-backend

Sprint 2 Project for MLH Fellowship made by Aman Sharma, Suhani Chawla, Saumya Gandhi.

cryptography data-security digi-locker django-rest-framework docusaurus2 ethical-data harry-potter

Last synced: 01 Aug 2025

https://github.com/catalyst-network/dotnet-crypto-benchmarking

Project to benchmark different c# crypto libraries and curves including NSec && SecpK1 wrapped && BouncyCastle

atlas-city benchmarkdotnet benchmarking bouncycastle crypto-benchmarking crypto-libraries cryptography nsec secp256k1

Last synced: 29 May 2026

https://github.com/tuanlh/classical-cipher

Giới thiệu một số loại mã hóa cổ điển và hiện thực bằng javascript

caesar cipher classical cryptography javascript playfair

Last synced: 08 Apr 2025

https://github.com/elliotwutingfeng/steam_totp

A Dart library for generating 5-character alphanumeric Steam TOTP codes.

crypto cryptography mfa otp security

Last synced: 10 Jul 2025

https://github.com/constantin9845/trivium-encoder

Trivium stream cipher implementation with cryptographically secure IV and Key generator.

cryptography csprng trivium

Last synced: 31 Jul 2025

https://github.com/ishan-surana/cryptosystems

The 𝚌𝚛𝚢𝚙𝚝𝚘𝚜𝚢𝚜𝚝𝚎𝚖𝚜 package offers a suite of classes and functions for both symmetric and asymmetric encryption, signature-verification, hashing algorithms, key exchange protocols as well as mathematical utility functions. Docs at https://cryptosystems.readthedocs.io.

asymmetric-cryptography bcrypt cryptography cryptography-algorithms cryptography-library cryptosystems gmp gmplib hashing-algorithm key-exchange-protocol mathematical-functions mathematical-utilities python-package python3 signature-verification symmetric-key-cryptography

Last synced: 09 Jul 2025

https://github.com/lukebaal/cloudproject

blockchain consent-management cryptography hyperledger privacy-by-design user-privacy

Last synced: 11 Apr 2025

https://github.com/zkdotim/zkim-file-format

Secure encrypted file format with three-layer encryption, integrity validation, and privacy-preserving search capabilities

blake3 cryptography encryption file-format privacy searchable-encryption security typescript xchacha20 zero-knowledge

Last synced: 15 Jan 2026

https://github.com/michaelsproul/antifa

Build a Merkle tree for your files

cryptography filesystem integrity paranoid rust

Last synced: 25 Oct 2025

https://github.com/benwoo1110/cryptography-gui

Simple visualisation for basic string cryptography algorithms

algorithms cryptography cryptography-gui pygame python3 string-cryptography-algorithms visualisation

Last synced: 31 Mar 2026

https://github.com/werrett/cryptopals

Solutions to the Matasano Cryptopals challenges

cryptography ctf golang

Last synced: 19 May 2026

https://github.com/lostbeard/spawndev.blazorjs.cryptography

A cross platform cryptography library that supports encryption with AES-GCM and AES-CBC, shared secret generation with ECDH, data signatures with ECDSA, and hashing with SHA on Windows, Linux, and Browser (Blazor WebAssembly) platforms.

aes-cbc aes-gcm blazor blazor-webassembly cryptography csharp dotnet ecdh ecdsa encryption server sha-hashes subtlecrypto webbrowser

Last synced: 30 Jul 2025

https://github.com/anirbanbasu/paillier-crypto

Implementation of the additively homomorphic Paillier cryptosystem

cryptographic-algorithms cryptographic-library cryptography encryption-algorithms homomorphic-encryption paillier

Last synced: 24 Jun 2025

https://github.com/noot/dleq-rs

cross-group discrete log equality proof

cryptography dleq zero-knowledge

Last synced: 03 Mar 2025

https://github.com/trainingbypackt/advanced-blockchain-development

Build highly secure, decentralized applications and conduct secure transactions

bitcoin blockchain cryptocurrencies cryptography ethereum smart-contracts

Last synced: 21 Sep 2025

https://github.com/functionally/crypto-lean4

Implementation of various cryptographic functions in Lean4

cryptography elliptic-curves lean4

Last synced: 03 Feb 2026

https://github.com/ryarazi/cryptohacksolutions

This repository contains my solutions to various challenges from cryptohack, a platform dedicated to learning modern cryptography through solving challenges.

cryptography cryptohack cryptohack-solutions diffie-hellman elliptic-curves hash rsa solutions symmetric-ciphers