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.
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.
Third public beta of CrypTool 1.4.31
The new CrypTool 1.4.31 beta is ready. This version is now available in 6 languages German, English, Spanish, Polish, Serbian and Greek. We would appreciate if you test this beta in detail and give us feedback. The release version of CT 1.4.31 is scheduled for mid 2014. (2013-10-04)
Land der Ideen - Statements
We would like to thank the CrypTool team for having put together the CrypTool-Online website, especially for the password checker and password generator. With permission from your team we integrated these functions into our internal corporate security web site. This helps our users to better understand in detail what kind of passwords are good and qualify for usage. We'd like to mention that it was easy to customize the scripts to reflect our internal password policy, which helped us to adopt the tool to real life. We hope this encourages your students to continue their path of providing useful tools and solutions.
Michael S. Oberländer, Chief Security Officer, Kabel Deutschland GmbH