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.

Crypdroid encrypts messages with AES and encodes the ciphertext in a way that it could be sent as a normal text message. It is compatible with the dedicated tool within CT2.
(2013-08-04)
Crypdroid - Are apps a good idea?

Crypdroid encrypts messages with AES and encodes the ciphertext in a way that it could be sent as a normal text message. It is compatible with the dedicated tool within CT2.

Smartphone owners visiting the CrypTool project can find cryptographic algorithms on the CrypTool Online website. This website is written in HTML and JavaScript supported by a PHP backend. Therefore this site is also running on all popular Smartphone browsers e.g. standard browsers of iOS, Android and Blackberry.

Are native apps more beautiful and faster?
For android there is a native app for encryption which is available for free named "Crypdroid" within the Play-Store. Crypdroid can encrypt messages to any app on the smartphone or save it as a file. Because of the transformation into printable characters a message can be send inconspicuous e.g. as normal email-text or text message (SMS). The receiver can than decrypt the message either through an own installation of Crypdroid on his/her smartphone or on the PC with CrypTool 2. This is possible due to the interoperability of Crypdroid an its tool "Encrypt with Password" from CrypTool 2. With this tool also the answer can be encrypted and send back.
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