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/synacktraa/vigenere-cipher

Small and portable Vigenere Cipher encoder and decoder cli based tool written in C.

c-language cryptography decryption encryption terminal-based vigenere-cipher

Last synced: 23 Jul 2025

https://github.com/martinpaljak/cdoc4j

Java library for handling CDOC 1.0/1.1/2.0 files with AES-256 GCM and RSA or ECC

aes-256 aes-gcm cdoc cryptography encryption java xml

Last synced: 14 Apr 2025

https://github.com/virgilsecurity/virgil-sdk-pfs-x

Virgil PFS SDK Objective-C/Swift

carthage cocoapods cryptography encryption perfect-forward-secrecy pki swift virgil-cards virgil-pfs-sdk

Last synced: 21 Aug 2025

https://github.com/ahf/erlang-ucrypto

µCrypto is a thin wrapper for the OpenSSL API's that are missing in OTP's crypto application.

cryptography elliptic-curves erlang openssl ripemd160

Last synced: 08 Apr 2026

https://github.com/kernelmethod/ChaChaCiphers.jl

GPU-compatible implementations of the ChaCha stream cipher family

cryptography rng

Last synced: 06 Apr 2026

https://github.com/sammyne/sm3

A Go implementation of SM3 cryptographic hash algorithm.

cryptographic-hash-functions cryptography

Last synced: 10 Apr 2025

https://github.com/cyanheads/toolkit-mcp-server

A Model Context Protocol server providing LLM Agents with system utilities and tools, including IP geolocation, network diagnostics, system monitoring, cryptographic operations, and QR code generation.

cryptography developer-tools geolocation llm llm-agent mcp model-context-protocol networking system-utilities typescript

Last synced: 28 Mar 2025

https://github.com/pyrmont/digestive

Digest things in pure Janet

blake3 checksums cryptography md5 sha1 sha2 sha3

Last synced: 09 Mar 2026

https://github.com/10d9e/vhe

Verifiable Homomorphic Encryption

cryptography

Last synced: 15 Jan 2026

https://github.com/cuhsat/spritz.c

Spritz cipher implementation in ANSI C.

algorithm ansi-c c cryptography spritz

Last synced: 12 Apr 2025

https://github.com/querdos/flask-encryptor

Flask extension helping encrypting users personal files

cryptography decryption encryption file flask upload users

Last synced: 08 Mar 2026

https://github.com/n3m/cryptext

Cryptographic SHA256-AES-Wrapped Passphrase Text Encoder and Decoder

aes aes-encryption aes-gcm cryptography golang passphrase sha256

Last synced: 12 Jan 2026

https://github.com/JuliaCrypto/Krypto.jl

A futuristic crypto library. In Julia. [OLD]

cryptography decryption deprecated-repo ecc encryption julia pqc rlwe rsa

Last synced: 06 Apr 2026

https://github.com/monich/foil

glib-style crypto

aes cryptography des-cipher encryption glib rsa security

Last synced: 21 May 2026

https://github.com/sug0/git-signify

Harness the power of signify(1) to sign arbitrary git objects

cryptography git openbsd rust security signature signify

Last synced: 07 May 2025

https://github.com/arnaud-robin/shake128

Implementation of SHAKE128 in c++.

cpp cryptography fips202 shake128

Last synced: 10 Apr 2025

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

ctf writeups

binary capture-the-flag cryptography ctf-learn ctf-writeups forensics pico-ctf reverse-engineering steganography web-exploitation

Last synced: 14 Jul 2025

https://github.com/pelock/stringencrypt-vscode-extension

Encrypt and hide plain text strings & file contents within your source code in a secure & encrypted form with the help of a polymorphic engine, generating random-looking decryption code every time.

cryptography encryption file-encryption polymorphic-engine security string-encoding string-encryption string-generator

Last synced: 30 Jul 2025

https://github.com/viniciusfinger/python-blockchain

Exploring the foundational concepts of blockchain with this simple Python implementation. This project demonstrates the core principles of blockchain, including mining, nonce, SHA-256 hashing, and proof of work. 🧱⛓️

blockchain blockchain-technology cryptocurrency cryptography proof-of-work python

Last synced: 12 Apr 2025

https://github.com/alisianoi/lyra2-java

Subset of Lyra2 password hashing

cryptography hash-algorithm password

Last synced: 05 Apr 2025

https://github.com/p3t3r67x0/vigenere_cipher

Simple programm to encrypt or decrypt a vigenere cipher text. This tool might be handy for some CTF games.

crypto cryptography ctf ctf-tools python vigenere-cipher

Last synced: 21 Jul 2025

https://github.com/dedis/fixbuf

Fixed length binary encoding of arbitrary structures in Go

cryptography encoding fixed-length golang

Last synced: 21 Sep 2025

https://github.com/shagege/blackbox

Surveillance tool using a permissionless blockchain

blockchain cryptography distributed-ledger p2p proof-of-work python

Last synced: 18 Aug 2025

https://github.com/tannerdsilva/swiftbcrypt

Swift package wrapping the OpenWall BCrypt hashing algorithm

bcrypt cryptography hash password swift

Last synced: 19 Feb 2026

https://github.com/isaka-james/caesar

The Linux tool to decrypt Caesar Cipher written using Rust, Very Fast Indeed

caesar- caesar-decryption cryptography linux-tool rust rust-powered

Last synced: 15 May 2026

https://github.com/mk-fg/tinydns-dynamic-dns-updater

Tool to generate and keep tinydns zone file with dynamic dns entries for remote hosts

automation cryptography djbdns dynamic-dns-entries nacl python tinydns

Last synced: 16 May 2026

https://github.com/xscriptorcode/xkyber_crypto

xKyberCrypto post-quantum encryption solutions in flutter based on the Kyber algorithm.

crypto cryptography cryptography-algorithms dart-package flutter-crypto kyber kyber-algorithm library post-quantum-cryptography public-key-encryption security xkyber

Last synced: 11 Apr 2025

https://github.com/togatech/tenvoy

PGP, NaCl, and PBKDF2 in node.js and the browser (hashing, random, encryption, decryption, signatures, conversions), used by TogaTech.org

cryptographic-random-generator cryptography decryption encryption encryption-decryption hash hash-functions hashing javascript md5 md5-hash nacl openpgp pbkdf2 pgp sha256 sha256-hash signature-verification signatures tweetnacl

Last synced: 28 Jul 2025

https://github.com/VirgilSecurity/virgil-sdk-pfs-x

Virgil PFS SDK Objective-C/Swift

carthage cocoapods cryptography encryption perfect-forward-secrecy pki swift virgil-cards virgil-pfs-sdk

Last synced: 02 Aug 2025

https://github.com/cmason3/vaulty

Vaulty in Python - Encrypt/Decrypt with ChaCha20-Poly1305

chacha20-poly1305 crypto cryptography ecdh ecies eddsa encryption-tool python scrypt

Last synced: 26 Jul 2025

https://github.com/bytemare/crypto

Abstracted prime-order elliptic curve groups in Go.

cryptography elliptic elliptic-curves go hash-to-curve nist p256 p384 p521 prime-order-group rfc9380 ristretto255

Last synced: 10 Apr 2025

https://github.com/hegdepavankumar/cipher-encryption-decryption

Cipher Encryption/Decryption This project is a simple implementation of the cipher encryption and decryption algorithm using JavaScript, HTML, and CSS. The cipher is a substitution cipher that replaces each letter in the plaintext with a letter a certain number of positions down the alphabet.

cipher cipher-algorithms cryptography encryption-algorithms encryption-decryption hashing-algorithm networking-concepts password security

Last synced: 03 Aug 2025

https://github.com/tramires/cose-w

WebAssembly COSE RFC 8152 library to encode/decode COSE messages in JS.

cbor cose cryptography encrypt js mac npm rust signature wasm

Last synced: 07 May 2025

https://github.com/arda-guler/bingallery

Encode your files into RGB images and decode them back.

command-line-tool cryptography decoder decoding encoder encoding proof-of-concept

Last synced: 14 Sep 2025

https://github.com/slowli/secret-tree

Hierarchical secret derivation with Blake2b and RNGs

cryptography key-derivation

Last synced: 22 Mar 2025

https://github.com/64/kaiser

Classical cryptanalysis tool

caesar-cipher cipher classical-cipher classical-cryptography crypto cryptography rust

Last synced: 06 May 2025

https://github.com/dhcgn/gopqexperiment

My Go PQ Experiment

cryptography csidh ed448 go golang hpke post-quantum

Last synced: 26 Aug 2025

https://github.com/tynes/nameswaps

Decentralized Exchange Infrastructure for Handshake Names

bitcoin blockchain cryptocurrency cryptography handshake peer-to-peer

Last synced: 29 Apr 2026

https://github.com/jsign/kzg-ceremony-test-vectors

Ethereum KZG ceremony test vectors using the reference implementation

cryptography ethereum kzg powers-of-tau

Last synced: 04 Apr 2025

https://github.com/ltonetwork/seasalt

NaCl compatible cryptography library using Bouncy Castle (Java)

cryptography java

Last synced: 14 Jan 2026

https://github.com/radkomih/cryptography-resources

Cryptography related resources

cryptography knowledge-proofs mathematics number-theory zero-knowledge zero-knowledge-proofs zkp

Last synced: 04 Feb 2026

https://github.com/markus-beuckelmann/aescrypt

aescrypt is a small command line tool to encrypt/decrypt files and directories with the well-established AES-256-CBC algorithm.

aes-encryption aescrypt cryptography docopt pycrypto python

Last synced: 25 May 2026

https://github.com/mgit-at/mqv

Package mqv implements MQV ECC as described in "NIST Special Publication 800-56A Revision 3".

cryptography cryptography-algorithms cryptography-library golang golang-package

Last synced: 09 Mar 2026

https://github.com/nccgroup/pasta-curves

Provides the Pasta curves: Pallas, Vesta and their field elements Fp and Fq.

cryptography elliptic-curve-cryptography elliptic-curves

Last synced: 26 Apr 2025

https://github.com/openmined/syft.cpp

SOON TO BE DEPRECATED - A library for encrypted, privacy preserving machine learning

cpp cryptography deep-learning privacy pytorch secure-computation syft

Last synced: 02 Jul 2025

https://github.com/valerauko/csele

A library to handle ActivityPub-related crypto needs.

activitypub clojure crypto cryptography federation fediverse hacktoberfest

Last synced: 09 Oct 2025

https://github.com/martian56/rail_fence

Rust implementation of the **RailFence Cipher**

cryptography encryption-decryption rail-fence rail-fence-cipher

Last synced: 27 Dec 2025

https://github.com/dmamakas2000/cryptanalysis-python

In this project, we experiment with the use of diverse cryptographic algorithms. First, we attempt to encrypt a plaintext message using the Vigenère Algorithm and a fixed-length encryption key. Afterward, we experiment with the decryption of the produced cipher using Kasiski's Method, as well as the Index of Coincidence statistical test.

cryptography index-of-coincidence jupyter-notebook kasiski-test python vigenere-cipher

Last synced: 18 Feb 2026

https://github.com/kiooku/cryptography-notebook

Cryptography Notebook is a repository containing some of the cryptographic implementations I have done for learning purposes.

assymetric-encryption commitment-schemes cryptography digital-signature double-ratchet-algorithm e2ee ggh hkdf hmac identification-scheme one-time-pad post-quantum-cryptography public-key-cryptography rsa signal x3dh zero-knowledge-proof

Last synced: 23 Apr 2025

https://github.com/elydre/sun-breaker

Module python de chiffrement avec perte

cryptography hashing

Last synced: 18 Jan 2026

https://github.com/chardoncs/libpgfe

Experimental cryptographic & OTP library

base-encoding cryptographic-library cryptography hash hotp otp otp-library sha totp

Last synced: 12 Mar 2025

https://github.com/antonio-hickey/veil

Multi purpose cryptography tool

crypto cryptography typescipt

Last synced: 05 Oct 2025

https://github.com/geeklearningio/gl-ionic-secure-file-storage

A service using two encryption plugins to encrypt data on iOS and Android

cordova cryptography ionic security storage

Last synced: 28 Apr 2025

https://github.com/avivsinai/telclaude

Secure Telegram-Claude bridge with LLM-based command screening and tiered permissions

ai-agent anthropic claude cryptography docker isolation llm llm-security permission-tiers sandbox security telegram-bot typescript

Last synced: 28 May 2026

https://github.com/phlay/pspka

password seeded public key authentication

asymmetric-cryptography authentication cryptography password

Last synced: 08 Apr 2025

https://github.com/juanbono/criptografia

Criptografia - UTN FRBA 2017

assignment criptografia-utn cryptography mugi

Last synced: 26 Mar 2025

https://github.com/jsign/zig-eth-secp256k1

A Zig libsecp256k1 wrapper with bells and whistles for Ethereum

cryptography ethereum secp256k1 zig

Last synced: 18 Mar 2025

https://github.com/apogiatzis/powsolver

A proof of work puzzle solver for CTF challenges

challenge crypto cryptography ctf hashing pow proofofwork python solver

Last synced: 30 Aug 2025

https://github.com/clay-good/proxilion

Proxilion is the security layer for the agentic workforce. It turns managed AI agents into governed users by enforcing strict cryptographic boundaries on every API call to SaaS like Google Workspace, Salesforce, or Atlassian.

agentic-ai ai-governance ai-security audit-logging claude-security confused-deputy cryptography cybersecurity data-loss-prevention human-in-the-loop llm-security managed-agents oauth-proxy openai-security pic-protocol prompt-injection-defense reverse-proxy saas-security self-hosted zero-trust

Last synced: 30 May 2026

https://github.com/wildonion/thecry

🥲 my whole knowledge of low level coding, decrypting, decompiling and shellcode injection

aes-256 cbc-aes-encryption cryptography decompilation decryption-algorithm shellcode

Last synced: 27 Feb 2025

https://github.com/cflems/pk

Penguin's Kiss: Asynchronous Command and Control software + multi-client + encrypted + terminal emulation

c2 command-and-control cryptography penguins-kiss pk remote-shell

Last synced: 10 Jan 2026

https://github.com/dajiaji/mkkey

Application-layer Key Generator supporting JWK (JSON Web Key) and PASERK (Platform-Agnostic Serialized Keys).

cryptography jose jwk jwt paserk paseto python security

Last synced: 14 Jan 2026

https://github.com/usscalsst41/xyn-seedwatcher-crypto-balance-checker-searcher-multicoin

This repository offers a versatile toolkit for managing multiple cryptocurrencies. Xyn SeedWatcher includes tools for balance checking, address searching, and multi-coin support. Use this to efficiently monitor and manage your crypto assets.

bip39 bitecoin blockchain coin-watcher cold-wallet cryptography ethereum hardware-wallet keypair mnemonic-phrase mnemonic-watcher monorepo react-native seed seed-phrase seed-phrase-checker seed-phrase-generator seed-watcher wallet wallet-watcher

Last synced: 28 Oct 2025

https://github.com/w3c/vc-di-quantum-resistant

Data Integrity Quantum Safe Cryptography Suite

cryptography data-integrity quantum vc verifiable-credentials w3c

Last synced: 29 May 2026

https://github.com/zebrunner/carina-crypto

Cryptographic Java Library. Provides an interface for encrypting / decrypting based on Cipher. Part of the Carina Framework

carina carina-framework cryptography java security

Last synced: 30 Apr 2025

https://github.com/binbash23/p

p - The password manager by Jens Heine <binbash@gmx.net>

cloud cryptography dropbox encryption manager password password-manager password-store pbkdf2 python secure

Last synced: 23 Mar 2025

https://github.com/faisalahmedbijoy/image_cryptography_with_autoencoders

Deep learning in image Cryptography

cryptography deep-learning image image-processing security

Last synced: 10 Oct 2025

https://github.com/lukasz-zimnoch/ipfs-market

Example repository intended to demonstrate a simple digital goods trading system powered by Ethereum smart contracts, IPFS file system and some basic cryptographic algorithms.

blockchain cryptocurrency cryptography ethereum go ipfs solidity

Last synced: 14 Apr 2026

https://github.com/oversys/pypass

A password manager written in Python. Data is encrypted using AES-256-GCM and the key is derived using PBKDF2-HMAC-SHA512.

aes-256 aes-256-gcm aes-encryption aes-gcm aes256-gcm cryptography password-manager pbkdf2 pbkdf2withhmacsha512 python sha-512 sha512

Last synced: 30 Apr 2025

https://github.com/eminmuhammadi/hidemydata

Managing a couple of algorithms to decrypt or encrypt text [PHP]

algorithms assymetric-security cryptography decryption encryption php

Last synced: 07 Jan 2026

https://github.com/0xdeafcafe/cypher-swift

Cipher algorithm to encode data into Taylor Swift lyrics

cipher ciphers cryptography cypher taylor-swift

Last synced: 24 Mar 2025

https://github.com/nmrr/nitrokeyhsm-cheatsheet

A cheat sheet of PKCS11 command to use Nitrokey HSM 2 (or other PKCS11 HSM)

cryptography hardware-security-module hsm pkcs11 smartcard

Last synced: 03 Jan 2026

https://github.com/shantanu66/cryptchat

A Desktop Application made using Tkinter framework in Python for Text Chatting between indivisuals or groups which is end to end encrypted using symmetric cyrptography algorithms.

aes-encryption cryptography desktop-application flask-api mongodb python tkinter

Last synced: 07 Oct 2025

https://github.com/rub-nds/terrapin-website

This repository hosts the public website for the paper "Terrapin Attack: Breaking SSH Channel Integrity By Sequence Number Manipulation" via GitHub Pages.

attack cryptography ssh vulnerability

Last synced: 18 Jan 2026

https://github.com/ericksumargo/pin

Built over Jetpack's EncryptedSharedPreferences API with less verbose syntax, efficient read/write mechanism, complex object and null default value support with compile time safety

coroutines cryptography jetpack kotlin sharedpreferences

Last synced: 09 Oct 2025

https://github.com/dorssel/dotnet-aes-extra

.NET Standard 2.0 implementation of AES-CTR, AES-CMAC, SIV-AES (aka AES-SIV), AES-CMAC-PRF-128 (aka PRF_AES128_CMAC), and PBKDF2-AES-CMAC-PRF-128.

aes aes-cmac aes-cmac-prf-128 aes-cmac-siv aes-ctr aes-ctr-mode aes-siv cmac cryptography dotnet dotnet-standard pbkdf2-aes-cmac-prf-128 siv siv-aes siv-mode

Last synced: 09 Apr 2025

https://github.com/kamushadenes/cloud-verify

Cryptographic attestation to verify if your application is running within a cloud environment.

cloud cryptography verification

Last synced: 30 Aug 2025

https://github.com/yds12/guarakapa

Password manager for the terminal.

cli command-line cryptography password password-manager rust terminal tui

Last synced: 10 Apr 2025

https://github.com/just-do-halee/secwords

secure and safe password container.

algorithms container cryptography no-std password rust security temporary

Last synced: 10 Jun 2025

https://github.com/johnkommas/barcodereader

Barcode Generator From Entersoft SQL

barcode-generator bolt bot cryptography fastapi label-tags labels odbc pandas pillow price-tags pyodbc python slack slackbolt slackbot sqllite3 uvicorn

Last synced: 23 Apr 2025

https://github.com/legend2ks/rapidsum

Checksum calculator and verifier tool

checksum checksum-calculator crc32 cryptography hashing md5 sha1 utilities

Last synced: 28 Apr 2026

https://github.com/aegis-aead/aegis-jasmin

An implementation of AEGIS in the Jasmin programming language.

aead aegis aegis-128x2 aegis-256x2 aegis128l aegis256 cipher cryptography jasmin

Last synced: 11 Mar 2026

https://github.com/delagen/cadesplugin

CryptoPro EDS Browser plug-in typescript implementation

cadesplugin cryptography cryptopro gost3411-2012

Last synced: 16 Mar 2026

https://github.com/hmxustin/pybchain

Реализация блокчейна, работающего по протоколу PoW

blockchain cryptocurrency cryptography equicoin

Last synced: 26 Jan 2026

https://github.com/leplusorg/docker-crypt

Multi-platform Docker container with utilities to cipher/decipher/sign data (gnupg, openssl, age, jose, xmlsec...).

cipher crypto cryptography decipher decrypt decryption digital-signature docker docker-image dockerfile encrypt encryption encryption-decryption hmac

Last synced: 11 Jun 2026

https://github.com/linariaworks/mephi

Proof of concept Limbus Company server reimplementation.

api clojure cryptography game-server http-server limbus-company private-server project-moon unity web-server

Last synced: 04 Mar 2025

https://github.com/jpkusumi/greenfieldpqc

Side step quantum threats. Level up your encryption. Future proof your code. This cryptographic library for .NET development includes NIST standardized cryptographic primitives and Kusumi-512, a novel stream symmetric cipher with a 512 bit key size for enhanced quantum resistance.

cipher code cryptography csharp dotnet encryption future-proof green-field kusumi library package post-quantum pqc quantum-resistant quantum-safe streaming symmetric