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)
"CrypTool includes an unparalleled array of cryptologic tools, which are ideal for anyone who wants to study cryptography or cryptanalysis. CrypTool is a free application, readily available on the Internet."
Prof. Mark Stamp, San Jose, California, USA
Free Cryptography Course from Stanford Professor Dan Boneh
This course explains the inner workings of cryptographic functions and how to correctly use them. The course starts till end of March 2012 and will last at least 5 weeks. Normally, students have to work through the exercises in the same week the lessons are published.