New Update Site - CrypTool Portal

This Webpage requires JavaScript.

Please enable JavaScript to use all functions of the CrypTool-Portal.

You can directly visit one of the CrypTool topic pages by clicking one of the five buttons here below.

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.

Free Downloads

CrypTool News

Join the #CSCG

The Cyber Security Challenge Germany (CSCG) is the German hacking competition for pupils and students. There are 12 online challenges starting on May 2nd, 2016. The juveniles have to solve different IT-Security tasks till August.

Cryptology game CODEBREAKERS.EU -- 4th edition

On 1st of June 2015 the first of 6 tasks starts on the Enigma level. For three weeks two times per week new documents with tasks are published.

CT 2.0 released

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)

Land der Ideen - Statements

"In Warsaw University of Technology we have been using CrypTool for five years. It is especially useful for students who need soft, but comprehensive introduction into IT security. As far, as I know there are no other applications in this field with so many didactic features."

Bartosz Sawicki, Politechnika Warszawska, Poland

The JCrypTool update site moved to http://www.cryptool.org/jct/update. This URL must be updated in JCrypTool manually if you are using a release older than release candidate 5a.

Launch JCrypTool and open the preferences via Window - Preferences
Expand the Install/ Update section and select Available Software Sites
There should be one entry with the location http://www.cryptool.org/jcryptool/update
Select this entry and click Edit
Replace the location link with the new update site URL http://www.cryptool.org/jct/update
You can give the update site a name optionally (in case this wasn't filled automatically)
Click OK to close the dialog and OK to close the preferences

That's it. Now you can use the update manager again.

In case you are already using release candidate 5a (RC5a) you do not have to update the URL.

Go To Top