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@cryptool-org

CrypTool Project

Open source tools to self-educate, to teach, and to try out cryptographic and cryptanalysis mechanisms (since 1998)
README.md

Welcome to CrypTool 🙋

We are a scientific project started in 1998 to educate about cryptology and make it easily accessible.

We offer cryptological knowledge and tools to self-educate, to teach, and to try out cryptography and cryptanalysis.

Start learning

💾 Download one of our 3 offline programs: CrypTool 1 + CrypTool 2 + JCrypTool

📱 Use our interactive browser version: CrypTool-Online

📖 Read our book on cryptography: CrypTool Book

More from us on GitHub

We have further organizations on GitHub. Have a look at:

CrypTool 2 sources and neuronal network attacks on a historical cipher machine

JCrypTool and it's Java sources

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  1. openssl-webterm openssl-webterm Public

    OpenSSL running in browsers, using WebAssembly (Emscripten) + xterm.js + React

    JavaScript 111 23

Repositories

Showing 10 of 11 repositories
  • npm-no-scripts Public

    GitHub Action to verify NPM dependencies don't have lifecycle scripts

    cryptool-org/npm-no-scripts's past year of commit activity
    JavaScript 0 MIT 0 0 2 Updated Aug 13, 2026
  • ncid Public Forked from ernstleierzopf/ncid

    Fork of NCID: A neural network to detect and analyse ciphers from historical texts

    cryptool-org/ncid's past year of commit activity
    Python 5 15 2 1 Updated Jul 2, 2026
  • wasm-webterm Public

    xterm.js addon to run WebAssembly binaries (supports WASI + Emscripten)

    cryptool-org/wasm-webterm's past year of commit activity
    JavaScript 95 Apache-2.0 18 6 2 Updated Jun 12, 2026
  • msieve-wasm Public

    WASM binaries for msieve

    cryptool-org/msieve-wasm's past year of commit activity
    C 0 0 0 0 Updated Apr 30, 2026
  • openssl-webterm Public

    OpenSSL running in browsers, using WebAssembly (Emscripten) + xterm.js + React

    cryptool-org/openssl-webterm's past year of commit activity
    JavaScript 111 23 6 2 Updated Apr 29, 2026
  • busybox-wasm Public

    WASM binaries for busybox (web)

    cryptool-org/busybox-wasm's past year of commit activity
    Shell 0 Apache-2.0 0 0 0 Updated Apr 29, 2026
  • cryptobrief Public

    A crypto-programming language including an IDE

    cryptool-org/cryptobrief's past year of commit activity
    Java 12 GPL-3.0 3 9 1 Updated Apr 22, 2026
  • cryptool1 Public

    CrypTool 1 (CT1) is a free Windows program for cryptography and cryptanalysis

    cryptool-org/cryptool1's past year of commit activity
    C++ 19 GPL-2.0 4 1 0 Updated Jun 13, 2024
  • .github Public

    GitHub special repository, contains an overall README

    cryptool-org/.github's past year of commit activity
    0 0 0 0 Updated May 28, 2024
  • cto Public

    Plugins of CrypTool-Online (CTO) containing crypto algorithms and tools

    cryptool-org/cto's past year of commit activity
    JavaScript 34 Apache-2.0 18 1 1 Updated Apr 13, 2024
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