"I have been using CrypTool to support laboratory teaching of our cryptography class at Royal Holloway, University of London for several years now and it just keeps getting better and better." (September 2012)
Professor Keith M. Martin, Director of the Information Security Group (ISG) at Royal Holloway, University of London.
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 1?
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.