What is CrypTool 1

CrypTool 1 (CT1) is an open-source Windows program for cryptography and cryptanalysis. It’s the most wide-spreaded e-learning software of its kind.

What is CrypTool 2?

CrypTool 2 (CT2) is an open-source program offering an innovative visual programming GUI to experiment with cryptographic procedures and to animate their cascades.

What is JCrypTool?

JCrypTool (JCT) is an open-source e-learning platform, allowing to experiment comprehensively with cryptography on Linux, MAC OS X, and Windows.

What is CrypTool-Online?

CrypTool-Online (CTO) runs in a browser and provides a huge variety of encryption methods and analysis tools including many illustrated examples.

What is MysteryTwister C3?

MysteryTwister C3 (MTC3) is an international Crypto Cipher Contest offering a broad variety of challenges, a moderated forum and an ongoing hall-of-fame.

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Land der Ideen - Statements

"I've been using CrypTool for years in internships for IT-Security at the University of Klagenfurt and Distance Learning Computer Science at the University of Applied Science Trier. CrypTool is used here among the students with enthusiasm because in many cases it awakes the play instincts in the up-and-coming computer scientists (e.g. through manual decryption of ciphertexts or number games.) If only learning were always such fun, then it would be much easier for us students!"

Dipl.-Ing. Dr. Peter Schartner, Uni Klagenfurt

CrypTool News

New Version of CrypTool — CT 1.4.41 released

A new release of CrypTool 1 was published on March 27, 2018.

This mature version is available in 6 languages (German, English, Spanish, Polish, Serbian, and French). Compared to 1.4.40, it contains many small bug fixes and corrections (especially for functions using Animal, Flash, HTML, and PDF).

Read more ...

New Release of CrypTool — CT 1.4.40 released

A new release of CrypTool 1 was published on September 21, 2017.

This version is available in 6 languages (German, English, Spanish, Polish, Serbian, and French), and it contains many bug fixes and corrections.

Read more ...

CryptoPrograms with Online Analyzers

The website CryptoPrograms http://www.cryptoprograms.com is dedicated to create and solve classical ciphers online.
New on this site are analyzers for solving classical ciphers without any knowledge of the keyword and, in many cases, the key length. Routines for solving around 40 cipher types are provided.
(2017-07-30)

Release Candidate 7 available

JCrypTool 1.0.0 Release Candidate 7 is available for download! This release contains a lot of bugfixes, feature enhancements and six new crypto plug-ins.

JCrypTool 1.0.0 Release Candidate 7 is available for download! This release contains a lot of bugfixes, feature enhancements and six new crypto plug-ins:

  • New visualization plug-in Extended RSA
  • New visualization plug-in Signature Demonstration
  • New visualization plug-in Public-Key Infrastructure
  • New visualization plug-in Huffman Coding
  • New visualization plug-in Shanks Babystep-Giantstep
  • New games plug-in Divide

Thanks to all our contributors!

All changes are listed on the Core Issues and on the Crypto Issues pages.

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