You can directly visit one of the CrypTool topic pages by clicking one of the five buttons here below.
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.
CrypTool 2 (CT2) is an open-source program offering an innovative visual programming GUI to experiment with cryptographic procedures and to animate their cascades.
JCrypTool (JCT) is an open-source e-learning platform, allowing to experiment comprehensively with cryptography on Linux, MAC OS X, and Windows.
CrypTool-Online (CTO) runs in a browser and provides a huge variety of encryption methods and analysis tools including many illustrated examples.
MysteryTwister C3 (MTC3) is an international Crypto Cipher Contest offering a broad variety of challenges, a moderated forum and an ongoing hall-of-fame.
JCrypTool switched to Eclipse 3.7 (Indigo) and updates to Java runtime 6.0 with release candidate 5 (available since December 2011). From now on, all JCrypTool developers can use the latest Java and Eclipse features in their JCrypTool plug-ins.
JCrypTool Release Candidate 6 is available...
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