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JCrypTool builds are based on Eclipse RCP and require Java 8 as runtime environment.

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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.

What is CrypTool 2?

CrypTool 2 (CT2) is an open-source program offering an innovative visual programming GUI to experiment with cryptographic procedures and to animate their cascades.

What is JCrypTool?

JCrypTool (JCT) is an open-source e-learning platform, allowing to experiment comprehensively with cryptography on Linux, MAC OS X, and Windows.

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.

What is MysteryTwister C3?

MysteryTwister C3 (MTC3) is an international Crypto Cipher Contest offering a broad variety of challenges, a moderated forum and an ongoing hall-of-fame.

Here you find the latest stable version of JCrypTool. JCrypTool requires Java 8 as runtime environment, the 64 bit version for the 64 bit JCrypTool, or the 32 bit version for the 32 bit JCrypTool (32 bit JCrypTool won't work on 64 bit Java and vice versa). Detailed release information is available in our wiki. Installation instructions are available here.

Interested in the latest JCrypTool version including the latest crypto plug-ins?

JCrypTool weekly builds can be downloaded here. Please keep in mind that these builds are not really tested and may contain incomplete or brand new features that do not reach the quality of an official release yet. Of course your feedback (feature ideas, bug reports) is very welcome and appreciated!

Weekly builds are automatically updated every Saturday without any other announcement. JCrypTool requires Java 8 as runtime environment, the 64 bit version for the 64 bit JCrypTool, or the 32 bit version for the 32 bit JCrypTool (32 bit JCrypTool won't work on 64 bit Java and vice versa).

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