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: 2026-07-03 00:07:02 UTC
JSON Representation

https://github.com/lokranjanp/2fa

A custom 2FA system using Python, SQL, Redis, and SMTP, featuring dynamic 6-digit OTP generation with PyOTP. Will develop it into AaaS [Authentication as a Service] .

cryptography entity-authorization flask python smtp user-authentication

Last synced: 01 May 2026

https://github.com/yashkarthik/hash_crakking

Hash texts entered.

cryptography hashing python python-3

Last synced: 10 Mar 2026

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

Signing Certificate Rotation Service for Brighid Identity.

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Last synced: 14 Apr 2026

https://github.com/farahsedd/secure-authentication-project

This project focuses on creating a reliable authentication and network services infrastructure using OpenLDAP, SSH, Apache, OpenVPN, DNS, and Kerberos.

apache authentication cryptography dns infrastructure kerberos network-security openldap openvpn ssh

Last synced: 08 Jan 2026

https://github.com/elliotwutingfeng/secret_broadcast

Send encrypted webcam snapshots over Telegram to specific users.

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Last synced: 20 Oct 2025

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

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

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Last synced: 14 Apr 2026

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/theoddysey/blockchain-go

A Bitcoin-like blockchain implementation in Go, demonstrating cryptographic principles, PoW consensus, UTXO transactions, wallet management, and P2P networking.

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Last synced: 02 May 2026

https://github.com/jordanbaird/hashgenerator

Generate hash digests using commonly available hash algorithms

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Last synced: 23 Oct 2025

https://github.com/codyverse/basex64

A simple cryptographic tool for storing data in distributed version control systems like Git.

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Last synced: 04 Feb 2026

https://github.com/ashiqyousuf/bints

Implement 1024 bit integer in C

c cryptography

Last synced: 25 Oct 2025

https://github.com/diegodromer/guardara

Guardara – Seu cofre digital inteligente. De senhas “fortinhas” a criptografia de dar inveja a espião da CIA. 🔐

cloud-security cryptography dart encryption firebase flutter hive mobile mobile-app mvvm open-source password-generator password-manager secure-storage tfa two-factor-authentication

Last synced: 01 May 2026

https://github.com/cmancio00/datasecurity

cryptography privacy python3

Last synced: 24 Mar 2025

https://github.com/vveiln/crypto

Implementations of some crypto attacks

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Last synced: 14 Jan 2026

https://github.com/dbalan/cryptopals

Cryptopals solutions

cryptography go golang

Last synced: 13 Mar 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/im-a-kookie/cryptographic-aes-server

Simple manual implementation of multithreaded HTTP server via HTTPListenerContext, implementing custom AES virtual streams to provide large files securely.

aes-encryption cryptography http-server multithreaded-server stream-processing

Last synced: 11 Oct 2025

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/uofsc-fall-2022-math-587-001/homework8

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

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Last synced: 29 Apr 2026

https://github.com/anonputraid/zetcipher

Lightweight and secure text encryption tool built for developers and security enthusiasts.

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Last synced: 13 Jan 2026

https://github.com/newyaroslav/siphash-cpp

SipHash Headers Only C ++ Library

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Last synced: 12 Oct 2025

https://github.com/bytemare/secp256k1

Go implementation of Secp256k1 based on Fiat-Crypto, with RFC9380 hash-to-curve.

cryptography golang hash-to-curve prime-order-group secp256k1

Last synced: 14 Apr 2026

https://github.com/oglinuk/sbh

A stateless password manager.

cryptography go hash password password-manager security

Last synced: 13 Oct 2025

https://github.com/hsfzxjy/kuroport

[WIP] :ribbon: Decentralized file teleporter & messenger, designed for multiple platforms, transmitting over diverse networks.

cryptography decentralized file-sharing messenger

Last synced: 30 Mar 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.

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Last synced: 01 Mar 2026

https://github.com/kzorin52/nistp256

Rust dylib wrapper to RustCrypto/elliptic-curves [only keypair]

crypto cryptography elliptic-curves keypairs nistp256 perfomance secp256r1

Last synced: 08 Oct 2025

https://github.com/pranjalco/caesar-cipher-simple

A Python program that implements the Caesar Cipher for encoding and decoding messages. Users can input text, choose shift numbers, and decide whether to encode or decode. Includes a user-friendly loop for multiple operations in one run.

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Last synced: 30 Mar 2025

https://github.com/losthopes/secured-accounts-lab

Lab for Security of programs and Data course

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Last synced: 14 Mar 2025

https://github.com/ben854719/autonomous-health-monitoring-emergency-response

This app uses Bluetooth to link a worker’s smartphone with a supervisor’s laptop for live health monitoring. PySyft handles secure biometric authentication, while machine learning detects injuries and visualizes them on a dashboard. Agentic AI responds to critical events by triggering emergency protocols and contacting 911 with location data.

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Last synced: 28 Apr 2026

https://github.com/carloslfu/ts-crypto

Crypto utilities for TypeScript proyects

cryptography typescript

Last synced: 02 May 2026

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/keyweeusr/elchacha

ChaCha20 implementation as per RFC7539

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Last synced: 08 Oct 2025

https://github.com/kaushalag29/cryptography

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

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Last synced: 26 Oct 2025

https://github.com/craiggleso/enigma

Javascript implementation

cryptography enigma

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/rudrowo/des-cpp

cryptography

Last synced: 06 Oct 2025

https://github.com/juanfkurucz/proyecto-seguridad

Subject "Seguridad" (Security) from Universidad Catolica del Uruguay

cryptography hashing python security

Last synced: 24 Mar 2025

https://github.com/rudradcruze/cryptography-algorithm-java

Some algorithm of network cryptography

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Last synced: 30 Jul 2025

https://github.com/clats97/keysense

KeySense: highly secure text encryption. Nothing beats it.

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Last synced: 16 Oct 2025

https://github.com/zerdicorp/hashalgo

Second Attempt to Understand Hashing.

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Last synced: 02 Apr 2025

https://github.com/keyweeusr/blake

BLAKE implementation as per RFC7693

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Last synced: 05 Oct 2025

https://github.com/nikhilr612/isaacrs

No-std implementation of ISAAC PRNG

cryptography isaac isaac-64 no-std random-number-generator

Last synced: 03 Apr 2025

https://github.com/yizhezhang-ervin/knowledge_cryptography

Cryptography with Python

cryptography python

Last synced: 18 Oct 2025

https://github.com/kenatsf/solidity-signature

cryptography ethereum nextjs security smart-contracts solidity

Last synced: 03 May 2026

https://github.com/fzed51/spicy-mash

Classe de cryptage et décryptage simplifiée se basant sur OpenSSL

cryptography openssl php simple

Last synced: 14 Jan 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/giatraskon/overthewire-wargames-solutions

Solutions for OverTheWire wargames, each wargame has its own directory containing Bash scripts for each level's commands.

bash-scripting binary-exploitation capture-the-flag cryptography cybersecurity ethical-hacking overthewire overthewire-bandit overthewire-behemoth overthewire-krypton overthewire-leviathan overthewire-maze overthewire-narnia overthewire-natas overthewire-solution overthewire-utumno penetration-testing security-challenges wargames web-security

Last synced: 31 Mar 2025

https://github.com/shaina-gh/dss

Java implementation of the Digital Signature Standard (DSS) for message integrity and authenticity verification.

cryptography cryptography-algorithms digital-signature-algorithm digital-signature-authentication dss java signature-verification

Last synced: 22 Apr 2025

https://github.com/sajad-net/handybar

Base64 encoder and decoder extension

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Last synced: 11 Apr 2026

https://github.com/khanhtran0111/Secure-file-encryption-tool

Implement a program to encrypt and decrypt files securely

chacha20 cpp17 cryptography encryption-decryption python3

Last synced: 29 Jun 2026

https://github.com/darkzarich/local-encrypt-tool

Node.js utility for encrypting and decrypting sensitive data locally. Uses AES-256-GCM encryption with a key derived from your provided password using PBKDF2.

cryptography node nodejs

Last synced: 12 Apr 2026

https://github.com/dubniczky/cryptography-algorithms

Python implementations of commonly used cryptographic algorithms

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Last synced: 23 Jun 2025

https://github.com/simonbetton/easydoge-km

Production-ready Dogecoin key-management SDK for Rust, Swift, Kotlin, Expo, and CLI/TUI.

cryptography dogecoin expo kotlin react-native rust swift wallet

Last synced: 09 Jun 2026

https://github.com/elliotwutingfeng/balloonhashing.jl

Balloon Hashing implemented in Julia.

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Last synced: 27 Feb 2025

https://github.com/dhcgn/crypto

Wrapper of secure encryption implementation to simplify the usage.

cryptography encryption go golang

Last synced: 17 Mar 2025

https://github.com/levongh/md5

The MD5 algorithm is a widely used hash function producing a 128-bit hash value. Although MD5 was initially designed to be used as a cryptographic hash function, it has been found to suffer from extensive vulnerabilities. It can still be used as a checksum to verify data integrity, but only against unintentional corruption.

cryptography hashing md5

Last synced: 03 Apr 2025

https://github.com/magical/fastpbkdf2

A faster implementation of x/crypto/pbkdf2

cryptography

Last synced: 24 Mar 2025

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

Key Method using JAVA

cryptography java

Last synced: 23 Mar 2025

https://github.com/jhartyharr23/fors33-verifier

Cryptographic verifier for high-integrity data. Prove provenance and ensure immutable audit trails. Automate at fors33.com/products

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Last synced: 01 Mar 2026

https://github.com/wzyskq/polybius_square_pro

An improved encryption and decryption system from the Polybius Square.

cryptography

Last synced: 14 Jan 2026

https://github.com/makarov-danil-school-projects-ctu/cryptography-image-encryption-decryption

algorithms cpp cryptography openssl

Last synced: 17 Mar 2025

https://github.com/kwas123/blockchain-file-verification

🔒 Verify file integrity and authenticity with this decentralized system on Ethereum, ensuring secure, tamper-proof document validation through blockchain technology.

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