CrypTool-Online (CTO) runs in a browser and provides a huge variety of encryption methods and analysis tools including many illustrated examples.
New CT2 Beta
The 9th Beta of CrypTool 2 was released on 20th December 2012. You are cordially invited to test and give feedback. Final version of CT 2 is planned to be published in April 2013. (2013-01-02)
First public beta of CrypTool 1.4.31
The new CrypTool 1.4.31 beta 05 is ready. You are cordially invited to test and give feedback. Final version of CT 1.4.31 is planned to be published mid 2013. (2012-07-31)
RSA sanity check
Testing RSA moduli for shared prime factors. Full article (2012-05-24)
Land der Ideen - Statements
"CrypTool already provides a strong basis for educational activities and there is great merit in continuing this development. There is scope for adding new algorithms, [...], and new cryptanalytic methods as they emerge. In summary I feel that CrypTool can play a very fruitful role in education about cryptography, and thus have a positive impact on this field in general."