"CrypTool 2 is a great app. All of my students use it every semester. Students have really enjoyed doing the projects that use CrypTool. They really like seeing how encryption works. CrypTool makes learning cryptography fun. I highly recommend it to undergraduate and graduate students. I wish there were more room in my books to write more about CrypTool."
Dr. Randall Boyle, Professor at Longwood University (Virginia)
New Version of CrypTool — CT 1.4.41 released
A new release of CrypTool 1 was published on March 27, 2018.
This mature version is available in 6 languages (German, English, Spanish, Polish, Serbian, and French). Compared to 1.4.40, it contains many small bug fixes and corrections (especially for functions using Animal, Flash, HTML, and PDF).
The website CryptoPrograms http://www.cryptoprograms.com is dedicated to create and solve classical ciphers online. New on this site are analyzers for solving classical ciphers without any knowledge of the keyword and, in many cases, the key length. Routines for solving around 40 cipher types are provided.
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.