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.

There are two main ways that you can contribute to the CrypTool 2 project. Your first option is to just get in touch with us to give us some feedback or advice, or to offer anything else that you would like to add to the project. The other option is to contact us to set up a long-term working relationship. Both options are greatly appreciated by us; the latter might bring you on the team list after some time.

If you want to develop a plug-in for CrypTool, you can simply download our source code and start programming. There are no restrictions other than you cannot upload your results to our code repository. If you think that it is good fun and you would like to contribute your code, just get in touch with us so that we can give you write access to our versioning system.

For anything else, please just drop us a message and we can start discussing. When you get in touch with us, it would be great if you could also tell us something about yourself - where you are from, how heard about CrypTool, how you use it, and of course what your reason is for contacting us... ;-)

Further documentation and links can be found here.

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