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: 2026-06-23 00:06:53 UTC
JSON Representation

https://github.com/moviet/php-encryption

Crypsic - A speed metal encryption library for php

aes-cipher cryptography decryption encryption encryption-library password-hash standalone symmetric-encryption

Last synced: 20 Feb 2026

https://github.com/harshanalluru/cryptography-cs641

cryptography decryption-algorithm des pyautogui pyperclip python

Last synced: 25 Aug 2025

https://github.com/uofsc-fall-2022-math-587-001/homework6

The Chinese remainder theorem and its application in the Pohlig-Hellman algorithm for solving the discrete logarithm problem.

cryptography discrete-logarithm go latex math

Last synced: 05 May 2026

https://github.com/caveyra/electron-executor-11

Roblox Electron Executor is one of the most favorite Roblox Executors at the moment. Before I tell you how to download Electron Executor, let me tell you that it is currently available safely for Windows. But it is not officially available for Android users as of now but the update is coming and will be launched soon.

cryptography electron electron-app electron-exploit electron-v3 gpg mobile nodejs offline privacy python react security

Last synced: 06 May 2026

https://github.com/shazeus/passforge

Secure password and secret generator — passwords, passphrases, PINs, tokens, and strength analysis

cli cryptography entropy hibp passphrase password-generator passwords pyperclip python secrets security terminal

Last synced: 09 Jun 2026

https://github.com/mthaler/cryptography

Cryptographic algorithms implemented in Rust

cryptography rust rust-library

Last synced: 09 Apr 2025

https://github.com/abd-mohsen/iss-project

final project for "Information security systems" course

cryptography encryption-decryption information-security

Last synced: 16 Mar 2025

https://github.com/taimoorzaeem/fcrypt

A command line tool to encrypt and decrypt file using a symmetric key.

c cryptography encryption-algorithm encryption-decryption file file-encryption

Last synced: 04 Oct 2025

https://github.com/tdiprima/cryptography

Testing crypto.js

cryptography nodejs

Last synced: 25 Oct 2025

https://github.com/rub-nds/ssh-strict-kex-violations-state-learning-artifacts

Artifacts for the paper "Finding SSH Strict Key Exchange Violations by State Learning", accepted at the ACM Conference on Computer and Communications Security (CCS) 2025.

artifacts attack cryptography cve-2025-32433 cve-2025-32942 ssh statelearning strict-kex vulnerability

Last synced: 25 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/flucium/aes-poly1305

aes aes-poly1305 cryptography poly1305 rust rustcrypto

Last synced: 25 Oct 2025

https://github.com/lightxlk/cryptanalyst_sysalt

Worked on an assignment of hex, ascii, and multiple cryptographic techniques.

ascii base64-encoding cryptography hex ipynb-parsing json

Last synced: 23 Jan 2026

https://github.com/denatajp/caesar-chiper

Implementation of Caesar Chiper in encrypts and decrypts text by shifting letters by a user-defined value. It takes input text and a shift value, applies the shift to encrypt, and reverses the shift to decrypt. The program demonstrates basic encryption and decryption using this simple technique.

caesar-cipher chiper cryptography

Last synced: 26 Aug 2025

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/clats97/vigenerecracker

A simple python script that will crack the classical implementation of the Vigenere Cipher. It uses a word-list to brute force the correct key and NLTK to identify English words / sentences.

cipher cipher-algorithms ciphers cracking cryptography vigenere vigenere-cipher vigenere-cipher-algorithm

Last synced: 26 Oct 2025

https://github.com/usherlabs/ecdsa-jwt

ECDSA challenge-based authentication with JWT session management

authentication cryptography ecdsa jwt rust

Last synced: 20 Jan 2026

https://github.com/berkbavas/cryptostuff

Cryptographic algorithms and attacks in Java 8

cbc-mode close-primes cryptanalysis cryptography fermat-factorization four-square miller-rabin-test monoalphabetic-cipher pkcs1 playfair-cipher rsa rsa-pkcs1-padding vigenere-cipher

Last synced: 21 Jun 2026

https://github.com/nico-curti/cryptosocket

TCP/IP Client Server with RSA cryptography

cryptography rsa socket

Last synced: 14 Nov 2025

https://github.com/edycutjong/silo

🛡️ Zero-knowledge whistleblower drop shielding source identity inside secure enclaves.

cryptography express intel-tdx nextjs privacy tee verifiable-credentials whistleblower

Last synced: 21 Jun 2026

https://github.com/vkweb/digital-signature-system

Millions of future coders will learn Cryptography via this project in the upcoming project-based version of freeCodeCamp.org

cryptography digital-signature freecodecamp-upcoming-curriculum public-key-cryptography rsa

Last synced: 24 Jan 2026

https://github.com/malisha4065/javap2pfiletransfer

Java P2P Secure File Transfer

cryptography java p2p

Last synced: 09 Jun 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/h0llyw00dzz/ocsp-fiber

This PKIX OCSP Fiber Framework

advanced cryptography go idiomatic-go restful-api security

Last synced: 29 May 2026

https://github.com/karlbateman/praetorian

A simple cryptographic key management service.

aes aes-256 aes-encryption compliance cryptography decryption encryption encryption-as-a-service gdpr-compliant golang key-rotation keyring

Last synced: 13 Jun 2025

https://github.com/flyq/zkctf

cft cryptography zkp

Last synced: 02 Apr 2025

https://github.com/badvibessz/bankingclientserverapp

Client server websocket banking app with GUI

banking client-server cryptography gui json websocket

Last synced: 15 Apr 2026

https://github.com/keidarcy/learn-cryptography-nodejs

learn-cryptography-nodejs

crypto cryptography javascript nodejs typescript vitest

Last synced: 08 May 2026

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/potreic/write-up-tpw-ctf-2024

CTF walkthrough solutions: web exploits (XXE Injection), binary overflows, cracking ciphers, and detecting in digital forensics. Break challenges & cat data.txt | grep flags! 🎯

binary-exploitation capture-the-flag cryptography cybersecurity digital-forensics web-exploitation

Last synced: 06 Feb 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/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/egorgvo/sberbank_callback_async_cryptography

Python implementation of Sberbank signature verification using async cryptography

cryptography sberbank signature-verification

Last synced: 11 Mar 2026

https://github.com/bwesterb/germain

Counts safe primes

cryptography estimate germain safe-prime

Last synced: 31 Mar 2025

https://github.com/hemanthh17/da-1-crytograghy-vit

Digital Assignment for Crytography and Network Security Assignment

cryptography flask python3 vignere-cipher

Last synced: 08 May 2026

https://github.com/ivanstambuk/openauth-sim

Authentication protocol simulator in Java 17 covering OATH HOTP/TOTP/OCRA, FIDO2/WebAuthn, EMV/CAP, and EUDI wallet/OpenID4VP

authentication cap cryptography emv eudi-wallet fido2 java oath ocra otp simulator webauthn

Last synced: 14 Jan 2026

https://github.com/purrproof/merkle-proof-vis

A tool to visualize Merkle trees, generate multi-proofs, and demonstrate the proof application process.

blockchain cryptography ethereum merkle merkle-proof merkle-tree merkletree visualization vizualisation

Last synced: 19 Apr 2026

https://github.com/fandigunawan/mtls-pkcs11

MTLS using PKCS#11

cryptography mtls mtls-request pkcs11 smart-card

Last synced: 04 Jul 2025

https://github.com/fsanaulla/splabs

c cryptography

Last synced: 10 Jun 2026

https://github.com/abund4nt/h3xtel-scripts

Repository with solution and explanation of the challenges of the H3xtel course.

cryptography ctf mathematics python

Last synced: 24 Mar 2025

https://github.com/4f48/semail

Secure E-Mail

cryptography hackclub rust

Last synced: 01 Feb 2026

https://github.com/projects-developer/blockchain-communication-system

A decentralized communication system built on blockchain technology, enabling secure, transparent, and tamper-proof exchange of information. Blockchain Communication System With Code, Documents, PPT, Report And Video

blockchaincommunicationsystem blockchaintechnology btechprojects computer-science-project computerscienceprojects cryptography decentralizedcommunication final-year-projects finalyearprojects identityverification mtechprojects peertopeernetworking securemessaging supplychaincommunication

Last synced: 25 Feb 2026

https://github.com/atticusrussell/hwsw-crypto-xilinx-template

Template for using Xilinx Vivado and SDK with CMPE-661 (HWSW Crypto) projects in a version control friendly way.

cmpe661 cryptography hwsw-crypto version-control vivado xilinx xilinx-sdk xilinx-vivado zybo

Last synced: 07 Feb 2026

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/quantumcoinproject/hybrid-pqc

Hybrid Post Quantum Cryptography

cryptography post-quantum-cryptography

Last synced: 01 Feb 2026

https://github.com/ankit-chaubey/ciph

Fast, streaming file encryption for large media files and cloud uploads using modern cryptography.

aes chacha20 cloud-security cryptography encryption-decryption file-encryption

Last synced: 07 Feb 2026

https://github.com/filiprokita/pwdgen

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

ascii c cli cli-tool command-line-tool cryptography cybersecurity open-source password password-generation password-generator random-number-generation random-password security utilities

Last synced: 07 Feb 2026

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/deadkennedyx/niebla-158

BIP-158 - Compact Block Filters

bip157 bip158 blockchain btc btc-wallet crypto cryptocurrency cryptography privacy-enhancing-technologies

Last synced: 20 Jan 2026

https://github.com/systemslibrarian/crypto-lab-lll-break

Browser-based LLL and BKZ lattice reduction demo — Gram-Schmidt orthogonalization, Lovász condition, step-by-step basis reduction animation, toy LWE primal attack, parameter explorer showing why Kyber's n=256 q=3329 survives while toy parameters fail instantly. The hardness assumption, made tangible. No backends. No simulated math.

bkz browser-demo crypto-lab cryptography gram-schmidt lattice-cryptography lattice-reduction learning-with-errors lll-algorithm post-quantum svp

Last synced: 01 Jun 2026

https://github.com/yoannchb-pro/private-html

PrivateHTML | Make the user access your page with a key

cryptography private-code

Last synced: 23 Aug 2025

https://github.com/utkarsha666/policy-engine-peaas

This project is written in Netbeans.

cloud cryptography css css3 database encryption hmac html html5 java javascript jquery navicat netbeans rsa security sha slaengine sql tomcat

Last synced: 10 Apr 2026

https://github.com/systemslibrarian/crypto-lab-bike-vault

Browser-based BIKE demo — code-based post-quantum KEM using QC-MDPC codes, Black-Gray-Flip decoding, and side-by-side comparison against ML-KEM. NIST Round 4 alternate candidate. No backends. No simulated math.

aes-256-gcm bike bit-flipping browser code-based crypto-lab cryptography kem nist post-quantum pqc qc-mdpc round4 typescript vite

Last synced: 01 Jun 2026

https://github.com/systemslibrarian/crypto-lab-kdf-chain

Browser-based KDF demo — HKDF, PBKDF2, scrypt, and Argon2id compared side by side with live parameter tuning, real timing measurements, and a KDF decision tree. No backends. No simulated math.

argon2 argon2id browser crypto-lab cryptography hkdf kdf key-derivation memory-hard owasp password-hashing pbkdf2 scrypt typescript vite

Last synced: 01 Jun 2026

https://github.com/systemslibrarian/crypto-lab-frost-threshold

Browser-based demo of FROST threshold signatures — t-of-n signing with RFC 9591, frost-ed25519 compiled to WASM. No single party holds the key. Any valid subset signs.

cryptography digital-signatures ed25519 elliptic-curve-cryptography frost shamir-secret-sharing threshold-signatures

Last synced: 01 Jun 2026

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

Browser-based demo of ML-DSA (FIPS 204) rejection sampling. Live iteration feed, rejection-reason breakdown, acceptance histograms, and the timing side-channel tradeoff — why variable signing time is a feature, not a bug.

constant-time crypto-lab cryptography crystals-dilithium digital-signatures dilithium fiat-shamir-with-aborts fips-204 implementation-security lattice-cryptography lattice-signatures lyubashevsky ml-dsa ml-dsa-65 post-quantum-cryptography rejection-sampling timing-side-channel

Last synced: 01 Jun 2026

https://github.com/abhayagiri/raho

Python module for simple symmetric encryption built on cryptography

cryptography fernet python python2 python3

Last synced: 25 Mar 2025

https://github.com/maxencerb/crypto-exercices-2021-td1

Ploblem solving for cryptography.

cryptography problem-solving

Last synced: 27 Apr 2026

https://github.com/systemslibrarian/crypto-lab-iron-serpent

Browser-based demo of Serpent-256, the AES finalist with the largest security margin — featuring encrypt/decrypt, round comparison visualization, and live performance benchmarks

aes-finalist argon2id block-cipher browser-demo crypto-lab cryptography hmac javascript serpent symmetric-encryption

Last synced: 01 Jun 2026

https://github.com/systemslibrarian/crypto-lab-curve-lens

Browser-based elliptic curve demo — point addition, scalar multiplication, and live ECDH across P-256, Curve25519, and secp256k1. Real field arithmetic. No backends. No simulated math.

browser crypto-lab cryptography curve25519 ecc ecdh elliptic-curves noble-curves p-256 point-addition scalar-multiplication secp256k1 typescript visualization vite

Last synced: 01 Jun 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.

aes-gcm browser-demo crypto-compare cryptography double-ratchet forward-secrecy hkdf key-exchange messaging-protocol post-quantum-ready signal-protocol typescript vite x25519

Last synced: 01 Jun 2026

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

Browser-based Private Set Intersection demo implementing classic DH-PSI (Meadows 1986, Huberman-Franklin-Hogg 1999) over ristretto255 with RFC 9380 hash-to-curve. The primitive behind Signal contact discovery and Apple password monitoring.

contact-discovery crypto-lab cryptography ddh dh-psi diffie-hellman hash-to-curve noble-curves privacy-preserving private-set-intersection psi rfc-9380 ristretto255 secure-computation secure-multi-party-computation secure-two-party-computation signal-protocol

Last synced: 01 Jun 2026

https://github.com/rezameerr/ecc-framework

Elliptic Curve Cryptography (ECC) Framework, ECC, ECDH(E), ECDSA, EC ElGamal, ECIES, HMAC

argon2 blake2 cryptocurrency cryptography digest digital-signature ecc ecdh ecdhe ecdsa ecies elgamal elliptic-curve-cryptography elliptic-curves hmac kdf key-agreement keypair-generator symmetric-encryption twofish

Last synced: 17 Oct 2025

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.

aead aes algebraic-attacks browser-demo crypto-lab cryptography meet-in-the-middle security-analysis threat-modeling typescript vite

Last synced: 01 Jun 2026

https://github.com/devehab/cryptotools

An educational cryptography toolkit in Arabic that provides hands-on learning for various cryptographic concepts including wallet generation, encryption/decryption, hashing, and digital signatures. All operations are performed client-side for maximum privacy and security.

cryptography digital-signatures encryption-decryption encryption-decryption-tool hash-functions open-source wallet-generator

Last synced: 09 Feb 2026

https://github.com/viveksahu26/cobra_cli

chit-chat: send encrypt and decrypt messages in your style

cobra-cli cryptography go

Last synced: 04 Jul 2025

https://github.com/crime-trix/metacrypt-cpp

C++20 MetaCrypt authenticated encryption envelope using Windows CNG

aes-gcm cpp cryptography cxx20 encryption pbkdf2 windows

Last synced: 02 Jun 2026

https://github.com/peterfritz/time

Get the current time, timezone, and a language-sensitive representation of the current time in the local timezone based on the user's IP. Create and validate signed date tokens.

cryptography date time

Last synced: 12 Jun 2025

https://github.com/reznik99/cryptotools

Crypto playground in your browser

cryptography material-ui pkcs1 pkcs10 pkcs8 react sec1 subtlecrypto x509

Last synced: 09 Feb 2026

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

Key Method using JAVA

cryptography java

Last synced: 23 Mar 2025

https://github.com/mokkunsuzuki-code/stage354

Stage354: Signature Key Rotation Ledger Layer with Stage178 Assumption, Threat Model, and Guarantee Binding. Transparent key lifecycle tracking, signature key status recording, ledger chaining, and PQC migration-aware verification metadata.

audit compliance cryptography cybersecurity ed25519 evidence gpg key-lifecycle key-rotation ledger ml-dsa pqc provenance qsp signature-verification sigstore supply-chain-security transparency trust verification

Last synced: 23 Jun 2026

https://github.com/atropinetears/atropinetears.github.io

My personal site to not only demonstrate my web design / web development skills, but also to list out my blog posts, projects, resources, and other information.

0xsilene blog cryptography github-io github-pages security web web-design web-development website

Last synced: 27 Feb 2026

https://github.com/5obhan/cs01-image-steganography

Hiding Information Inside an Image using AES-CBC Encryption & Least-Significant-Bit Steganography

aes aes-256 aes-cbc aes-cbc-256 aes-cbc-encryption aes-encryption cryptography cyber-security cybersecurity encrypted-data encryption-decryption image-steganography least-significant-bit lsb-bit-manipulation lsb-steganography steganography

Last synced: 05 Aug 2025

https://github.com/kcbojanowski/cryptographyappproject

App that helps you deal with classical algorithms of cryptography as well as RSA algorithm and Shamir's Secret Sharing Scheme.

cryptography python3

Last synced: 16 Mar 2025

https://github.com/ashirwadpradhan/intragit

A SaaS secure VCS (based on Git) for confidential repositories

aes-gcm certificate-authority certificate-signing-request confidential-repositories cryptography envelope-encryption git public-key-infrastructure saas-secure-vcs

Last synced: 19 Apr 2026

https://github.com/rmnblm/papers

📄 Published papers.

blockchain cryptography distributed-systems paper science-research

Last synced: 04 Jan 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/ianacaburian/generate-key-file

Ports juce_KeyGeneration::generateKeyFile() to node.

auth cmake cpp20 cryptography juce keyfile nodejs npm rsa typescript

Last synced: 15 Mar 2025

https://github.com/cr0mb/satoshi-sweeper

Satoshi Sweeper is a Bitcoin wallet generator and balance checker. It generates mnemonic phrases, derives Bitcoin addresses (Legacy, Nested SegWit, and Native SegWit), and checks their balances using the Blockstream API.

biputils bitcoin bitcoin-finder bitcoin-recovery bitcoin-stealer bitcoin-wallet cryptography ethereum ethereum-finder ethereum-stealer ethereum-wallet hashlib

Last synced: 09 May 2026

https://github.com/xm0onh/stateviz.dev

Interactive visualization playground for blockchain data structures. Learn how blockchains organize and store data through hands-on exploration and visual experimentation.

algorithms blockchain cryptography data-structures educational ethereum merkle-trie playground

Last synced: 12 Apr 2026

https://github.com/munizmat/cryptography-basics

cryptography java nodejs

Last synced: 09 May 2026

https://github.com/cosmian/cloudproof_rust

The Rust Cloudproof Data protection Library

cloudproof cryptography

Last synced: 27 Feb 2026

https://github.com/ivan-guerra/caesar_cipher

Caesar Cipher encrypt/decrypt/cracking utilities

caesar-cipher cryptography password-cracking

Last synced: 22 Jun 2026

https://github.com/eroydev/bip39-rusty

Rust library for BIP-39 mnemonic system

bip39 bitcoin cryptocurrency cryptography rust

Last synced: 22 Feb 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/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/rayniel95/ecdsa-node

My solution to week 1 project of Alchemy University.

alchemy-university blockchain cryptography docker express nextjs react reactjs web3

Last synced: 11 Apr 2026

https://github.com/lukman-01/alchemy-eth-bootcamp-projects

Alchemy-Eth-Bootcamp documentation of learning and developing blockchain technology from scratch using JavaScript, Blockchain cryptography and storage,Solidity, Etherjs, Hardhat and indept smart contract writing.

blockchain cryptography erc20 ethereum etherjs evm hardhat javascript nfts smart-contracts solidity