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/aniketc068/atick-python

Standalone Python library for PDF digital signatures — PAdES/CMS, USB tokens, Windows store, Indian eSign, timestamps, LTV and a green-tick appearance Adobe shows as valid. Zero dependencies.

adobe cades cryptography digital-signature esign ltv pades pdf pdf-signature pkcs11 python sign-pdf timestamp

Last synced: 16 Jun 2026

https://github.com/bmwant/ecc

Elliptic Curve Cryptography algorithms

calculus cryptanalysis cryptography

Last synced: 17 Mar 2025

https://github.com/ikcede/js-one-time-pad

A simple one-time pad class built in Javascript

crypto cryptography javascript

Last synced: 29 May 2026

https://github.com/zhongruoyu/sha2

An implementation of the SHA-2 hash algorithms.

cryptography hash sha256 sha512

Last synced: 18 Jun 2026

https://github.com/abhishekjain12/string-cryptography-method-1

Key Method using JAVA

cryptography java

Last synced: 23 Mar 2025

https://github.com/erhant/fftype

Finite-field arithmetic within the type system.

cryptography elliptic-curves finite-fields polynomials types typescript

Last synced: 05 Oct 2025

https://github.com/akhuntsaria/online-bcrypt-generator

Yet another online bcrypt generator.

bcrypt cryptography encryption generator javascript webpack

Last synced: 17 Jan 2026

https://github.com/praths71018/django_and_rest_framework_fundamentals_hospitalmanagement

A comprehensive Hospital Management System which is built using Django and Django Rest Framework

api-rest apm authentication authorization bitbucket cryptography django django-celery django-celery-beat django-rest-framework django-signals encryption-decryption middlware mysql newrelic redis unit-testing

Last synced: 13 Apr 2026

https://github.com/yaon-c2h8n2/krypton

Projet réalisé dans le cadre de l'UE Codages & Cryptographie en M1 à l'Université de Bourgogne

cryptography data-compression-algorithms data-encoding

Last synced: 05 Oct 2025

https://github.com/abhishekjain12/string-cryptography-with-3-different-methods.

1. PitLatin code language 2. Reverse PitLatin code language 3. Key Method

cryptography java string-cryptography

Last synced: 23 Mar 2025

https://github.com/matthewcash/esp32-ecdsa

ECDSA (P-256) signing/verification using esp32 hardware accelerators

cryptography ecdsa embedded esp32

Last synced: 17 May 2026

https://github.com/rudrowo/aes-cpp

cryptography

Last synced: 06 Oct 2025

https://github.com/rudrowo/rsa-cpp

cryptography

Last synced: 06 Oct 2025

https://github.com/dpetrosy/encryptor-decryptor

My small project encryptor / decryptor written in Python.

algorithm console-application cryptography decoder encoder encoder-decoder encryption-decryption python python3

Last synced: 06 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/projects-developer/steganography-projects

This project aims to design and develop a steganography system that enables secure and covert communication. Steganography Project Project Includes Project Includes Source Code, PPT, Synopsis, Report, Documents, Base Research Paper & Video tutorials

btechprojects computer-sceience-projects computerscienceprojects covertcommunication cryptography datasecurity final-year-projects finalyearprojects imageprocessing informationhiding mtechprojects securecommunication steganography textanalysis

Last synced: 04 Jan 2026

https://github.com/pmarreck/blip_mp

BLIP-storage arbitrary-precision integers in pure Zig. Beats GMP at i64 (1.95-2.66×) and common cryptographic mul (1.12-1.46×) on Apple Silicon. 8240 GMP cross-validation tests pass.

arbitrary-precision-integers bignum blip cryptography ffi gmp multi-precision zig

Last synced: 31 May 2026

https://github.com/tegmentum/secure-log

Tamper-evident audit log for Rust: hash-chained entries, Merkle-sealed segments, externally-signed checkpoints, witness anti-equivocation, and AEAD payload sealing — native crates plus WASI Preview 2 components.

audit-log audit-logging component-model cryptography hash-chain merkle-tree rust security tamper-evident tpm transparency-log wasi wasm webassembly

Last synced: 25 Jun 2026

https://github.com/ohimoiza1205/goldman-sachs-forage-swe-simulation

Crack passwords and suggest security improvements as a Governance Analyst at Goldman Sachs.

cryptography goldman-sachs hashcat password-cracking software-engineering

Last synced: 17 Jan 2026

https://github.com/simplito/privmx-bridge-docker

Docker Compose for PrivMX Bridge.

chat communication cryptography data-transfer decryption e2ee end-to-end-encryption files messages messaging privacy privacy-protection private privmx secure security simplito storage thread zero-knowledge

Last synced: 06 Oct 2025

https://github.com/danielost/ecpoint-wrappers

Convenient wrappers for operations on elliptic curves in Golang.

cryptography ecc elliptic-curves

Last synced: 06 Oct 2025

https://github.com/ujangbedog/dpq-chat

A simple, secure peer-to-peer chat app built with Rust. Runs directly in the terminal with end-to-end encryption, post-quantum security (Kyber & Dilithium), and no central server.

chat cli cryptography p2p p2p-chat rust secure terminal terminal-app terminal-chat

Last synced: 06 Oct 2025

https://github.com/robertmcatee/saigo

a simple encryption toolkit written in Go

cryptography encryption

Last synced: 14 Jan 2026

https://github.com/saorsa-labs/saorsa-fec

Core foundational crates for the Saorsa P2P ecosystem: saorsa-types, saorsa-fec (Forward Error Correction), and saorsa-rsps (Reed-Solomon with Proof Systems)

cryptography error-correction fec foundation networking p2p reed-solomon rust types

Last synced: 20 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/tnmyk/localblockchain

Centralized and local imitation of blockchain technology using Javascript.

blockchain cryptography javascript

Last synced: 26 May 2026

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

Practice in Python using cryptography

cryptography python

Last synced: 07 Oct 2025

https://github.com/kaushalag29/cryptography

Basic Cipher Codes With Python.Deals With Encryption and Decryption.

books cryptography python-script python2-7

Last synced: 26 Oct 2025

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

Implementations of various Elliptic Curve Cryptography primitives such as ECDSA and Adaptor ECDSA over secp256k1

adaptor-signature adaptor-signatures cryptography cryptography-algorithms ecdsa ecdsa-cryptography ecdsa-signature ecdsa-signatures elliptic-curve elliptic-curve-cryptography elliptic-curves schnorr schnorr-signature schnorr-signatures

Last synced: 15 May 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/primefactor-io/commitment

Implementations of various Commitment Schemes

commitment-schemes cryptography cryptography-algorithms

Last synced: 15 May 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/mberry/bcrypter

Bcrypt in Rust.

bcrypt cryptography hashing passwords

Last synced: 08 Oct 2025

https://github.com/soyart/gfc

stable branch of gfc, a small go file encryption utility using AES 256 and PBKDF2

aes crypto cryptography encryption rsa

Last synced: 14 Jan 2026

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/idhamm15/p10-cryptography

Cryptography Application With Java Programming

application-java cryptography java

Last synced: 14 Mar 2025

https://github.com/erik-castro/devsecurity

Colecao de 5 livros tecnicos open-source sobre seguranca de software em portugues (PT-BR): Security-Driven Development, DevSecOps, Analise de Malware, Concorrencia Segura e Criptografia Engenheira. C++17/20, CVEs documentados, 300K+ linhas.

application-security books concurrency cplusplus cryptography cybersecurity devsecops encryption fuzzing malware-analysis open-source owasp post-quantum-cryptography pt-br reverse-engineering secure-coding security thread-safety tls

Last synced: 25 Jun 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/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/josh0wah/rsa-file-ecryption-with-go

Encrypt a message using RSA in Go

cryptography cybersecurity encryption go golang rsa

Last synced: 09 Oct 2025

https://github.com/dbalan/cryptopals

Cryptopals solutions

cryptography go golang

Last synced: 13 Mar 2026

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

Notes on Cryptography

cryptography jupyter python

Last synced: 27 Apr 2026

https://github.com/guilt/gsum

gsum is a versatile command-line hashing tool written in Go, supporting a wide range of cryptographic and non-cryptographic hash algorithms. It offers advanced features like incremental hashing, GPG signing/verification, progress bars, and compatibility with existing Unix and Windows environments.

chatgpt checksum cryptography defense-methods golang grok gsum hashing incremental range utility verification

Last synced: 09 Oct 2025

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/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/cythral/identity-certificates

Signing Certificate Rotation Service for Brighid Identity.

aws cryptography dotnet

Last synced: 14 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/elliotwutingfeng/secret_broadcast

Send encrypted webcam snapshots over Telegram to specific users.

cryptography fernet telegram webcam

Last synced: 20 Oct 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/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/greydevv/naive-sha-256

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

binary bits cryptocurrency cryptography python sha256 sha256-hash

Last synced: 26 Jun 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/ashiqyousuf/bints

Implement 1024 bit integer in C

c cryptography

Last synced: 25 Oct 2025

https://github.com/anonymouse64/crypto_test_golang

Crypto testing utility for Golang implementations

benchmark cryptography golang

Last synced: 14 Jan 2026

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/kamb-code/sha256-r19-preimage

Oracle-free preimage attack on 19-round reduced SHA-256 — paper, solver, and independent verifier

cryptanalysis cryptography cuda gpu hash-functions preimage-attack security-research sha256

Last synced: 27 Jun 2026

https://github.com/vveiln/crypto

Implementations of some crypto attacks

attack crypto crypto-attacks cryptography golang rsa

Last synced: 14 Jan 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/achnouri/ctf-challenges-write-ups

This repository is a collection of detailed write-ups for CTF challenges/machines/... that i have solved across different cybersecurity training platforms

capture-the-flag cryptography ctf ctf-challenges ctf-writeups cybersecurity hacking hacking-tools hackthebox offensive-security osint pentesting red-team reversing scanning security testing tryhackme vulnerabilities web

Last synced: 18 Feb 2026

https://github.com/krdevanshu06/steganography-app

This project is a steganography tool that allows users to hide and extract secret messages within images using Least Significant Bit (LSB) encoding. The tool provides a user-friendly Streamlit UI for seamless encoding and decoding of messages.

cryptography data-security image-processing lsb-encoding python steganography streamlit

Last synced: 18 Apr 2026

https://github.com/mttbernardini/mbc

🔐 Library and CLI for the MBC encryption algorithm. C remake of https://github.com/mttbernardini/mbencrypter.

algorithm c-library cryptography hex-strings library raw-data symmetric-keys text

Last synced: 11 Jul 2025

https://github.com/robertoaleman/ra-ultimate-cipher-analyzer

RA Ultimate Cipher Analyzer is a web-based tool designed to analyze encrypted files and suggest the encryption algorithm used based on statistical properties and known patterns.

aes aes-128 aes-256 aes-encryption algorithms code-analysis cryptography cypher rsa rsa-cryptography rsa-decryption rsa-encryption

Last synced: 18 Feb 2026

https://github.com/juanpinheirofiap/faceid

Aplicativo de reconhecimento facial com Oracle Database, DeepFace e OpenCV para autenticação via FaceID.

cryptography embeddings opencv oracle-database pyhton

Last synced: 12 Oct 2025

https://github.com/scarlet-oni/Lock-Talk

Console messenger between client and server using TLS 1.3 protocol to encrypt messages

console cryptography cyber-security cybersecurity messaging messanger python python3

Last synced: 12 Oct 2025

https://github.com/orlandos-nl/orlacrypt

cryptography ios swift

Last synced: 12 Oct 2025

https://github.com/UofSC-Fall-2022-Math-587-001/homework8

A bit about distribution of primes and Pollard's p-1 test

cryptography go latex math pollard-p-1 prime-numbers

Last synced: 07 May 2025

https://github.com/abdulbasit110/key-logger

An educational Python keylogger that captures keystrokes and securely encrypts logs using `pynput` and `cryptography`. For educational use only.

cryptography cybersecurity encryption keylogger pynput

Last synced: 13 Oct 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/vladistan/codebreaker-2018-explore

Notebooks to poke around the blockchain for codebreaker 2018 challenge walkthrough

blockchain codebreaker-challenge cryptocurrency cryptography ctf-challenges ctf-writeups cybersecurity reverse-engineering security walkthrough

Last synced: 13 Oct 2025

https://github.com/sucho6996/shadowsend-a-secure-communication-platform

This is a Java Spring boot and JS React project where sender will send a message which will be encrypted and embedded in an Image provided by the sender and the receiver will be able to see those images with sender's number in his/her inbox . Once the receiver will read the message it'll be deleted automatically for a traceless conversation.

cryptography eureka-discovery-client eureka-server feign-client git github java jpa jwt-authentication jwt-token messaging microservices open-feign platform security spring-boot spring-security steganography

Last synced: 01 Mar 2026

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/kodzonko/sdex-enrypted-communicator

Mobilna aplikacja webowa komunikatora szyfrującego wiadomości metodą SDEx z funkcją skrótu BLAKE3.

blake3 cryptography sdex secure-communication secure-messaging secure-messenger

Last synced: 15 May 2025

https://github.com/oxarbitrage/sinsemilla

Sinsemilla hash function haskell implementation

crypto cryptography hash-function sinsemilla

Last synced: 05 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/hidayatarg/blockchain_cryptocurrency_node.js

Building own crypto-Currency, that only has value dependent on those who back it. For security, cryptocurrencies rely on blockchaining: a database organized in such a way that records are kept secure through peer-to-peer networks. Each record is kept within a block, and each block holds a timestamp and link to the block before it. The first cryptocurrency was Bitcoin, implemented in 2009 by Satoshi Nakamoto.

cryptocurrency cryptography

Last synced: 10 Apr 2026

https://github.com/sycanz/ctf-writeups

My writeups for CTFs I've been in

cryptography ctf-writeups python3

Last synced: 15 May 2025

https://github.com/athanclark/purescript-sjcl

Bindings to the Stanford JavaScript Crypto Library

browser cryptography purescript sjcl

Last synced: 24 Jan 2026

https://github.com/magical/spritz

Spritz cryptographic sponge(-like) function, hash, and stream cipher in Go

cryptography

Last synced: 14 Oct 2025

https://github.com/osamikoyo/facekid

simple crypto library for c

c crypto cryptography library

Last synced: 28 Jun 2026

https://github.com/mizcausevic-dev/bls-attestation-broker

Multi-signer attestation broker using BLS12-381 aggregate signatures. N signatures collapse into one 96-byte aggregate verifiable in two pairings. Reference impl with textbook BLS; production should use blst.

agent-governance aggregate-signature ai-governance attestation bls bls12-381 cryptography platform-engineering rust

Last synced: 01 Jun 2026

https://github.com/marcellomaugeri/schaege-schwenk-cdh-based-ring-signature-scheme

This repo contains the implementation of the ring signature scheme proposed in "A CDH-Based Ring Signature Scheme with Short Signatures and Public Keys" by Sven Schäge & Jörg Schwenk

cryptography cryptography-library python3 ring-signature-scheme

Last synced: 17 Oct 2025

https://github.com/vicentevieytes/merkle-tree

Rust crate implementing a Merkle Tree data structure and Merkle Path proof generation and verification.

cryptocurrency cryptography merkle merkletree rust

Last synced: 22 Jan 2026

https://github.com/jkcso/enigma

Command line tool for the coding machine used by German forces in the Second World War. Simulates 2 machines set up in the same way allowed the sending of messages securely between their users. My code can be used to encrypt (or decrypt) messages provided on the standard input stream, outputting the encrypted (or decrypted) messages on the standard output stream.

cryptography history-of-computing

Last synced: 14 Mar 2025

https://github.com/arthurosipyan/learning-blockchain

Repository for blockchain learning material.

beginner beginner-code beginner-friendly beginners beginners-guide blockchain blockchain-demos blockchain-technology crypto cryptocurrency cryptography solidity solidity-contracts

Last synced: 25 Apr 2026

https://github.com/archisman-mridha/mathematics-notes

My hand-written notes on different mathematical topics (like Abstract Algebra, Complex Analysis, Algebraic Geomery etc.)

abstract-algebra algebraic-geometry complex-analysis cryptography elliptic-curve-cryptography elliptic-curves plonk riemann-hypothesis zero-knowledge-proofs zksnarks zkstarks

Last synced: 10 Mar 2026

https://github.com/nullisxyz/keycard

Blazing-fast Keycard SDK and CLI in Rust

cryptography ethereum keycard rust smartcard

Last synced: 15 May 2025

https://github.com/loneicewolf/py-snippets

Useful snippets in Python3 (mainly Jupyter)

cipher ciphers cryptography decryption encryption python3 snippets

Last synced: 15 May 2025

https://github.com/emorilebo/mobile_secrets_vault

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

aes-gcm cryptography django emori encryption fastapi godfreylebo mobile-backend python secrets-management security

Last synced: 27 Jan 2026

https://github.com/arec1b0/blockchain-on-java

A Java-based blockchain implementation featuring Proof of Work (PoW) and Proof of Stake (PoS) consensus mechanisms.

blockchain cryptography decentralized java proof-of-stake proof-of-work

Last synced: 04 Apr 2025

https://github.com/rlxchap2/crypto-miner

🔨Crypto Miner is a Python project designed to encrypt and decrypt files, especially images, using the powerful cryptography library

crypto cryptography csv numpy pillow python

Last synced: 08 May 2026

https://github.com/jonzeolla/lab-blockciphercryptography

An introductory lab to cryptographic block cipher modes.

block-cipher cryptography lab

Last synced: 15 Mar 2026

https://github.com/hemantksingh/blockchain

A simple blockchain that doesn't use proof-of-work

blockchain cryptography

Last synced: 30 Mar 2025

https://github.com/lapets/pailliers

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

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

Last synced: 06 Feb 2026

https://github.com/zairbulos/password-generator

Password generator build with Python.

cryptography python

Last synced: 05 Jul 2025

https://github.com/csharper63/server_encryption_file_system

This repository contains a server that use symmetric encryption to encrypt user files/folders and asymmetric encryption to share files/folders among users.

asymmetric-cryptography cryptography end-to-end-encryption symmetric-cryptography

Last synced: 19 Jan 2026