The release version of CrypTool 2.0 was released on 20th Aug 2014. We would be happy if many of you use it for teaching, self-study, education and awareness and give us feedback. (2014-08-25)
Article about solving the Double-Transposition Challenge in Cryptologia
A level X challenge in MysteryTwister C3 by Klaus Schmeh using the double-column transposition cipher withstood a long time against cryptanalysis efforts. Nevertheless, it was solved in November 2013 by George Lasry. (2014-06-25)
The 10th Beta of CrypTool 2 was released on 19th October 2013. You are cordially invited to test and give feedback. Final version of CT 2 is planned to be published in July 2014.
Land der Ideen - Statements
"I have been using CrypTool as a software tool to demonstrate the working principles of cryptographic algorithms and protocols, and to complement m lectures on computer and network security accordingly. My experience is that students like to work with CrypTool and to discover the wide range of cryptographic algorithms and protocols it implements. The tool provides an excellent playground to do lab studies and exercises."