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CrypTool is an open source e-learning tool illustrating cryptographic and cryptanalytic concepts. CrypTool implements more than 300 algorithms.〔Algorithms: ''(Functions in different CrypTool versions )'' Within a table all functions implemented are listed. This list can be adjusted using categories, search phrases and by specifying the CT versions.〕 Users can adjust these with own parameters. The graphical interface, online documentation, analytic tools and algorithms of CrypTool introduce users to the field of cryptography. Classical ciphers are available alongside asymmetric cryptography including RSA, elliptic curve cryptography, digital signatures, homomorphic encryption, and Diffie–Hellman key exchange, many of which are visualized by animations. CrypTool also contains some didactical games, and an animated tutorial about primes and elementary number theory. == Development, history and roadmap == The development of CrypTool started in 1998. Originally developed by German companies and universities, it is an open source project since 2001. More than sixty people worldwide contribute regularly to the project. Contributions as software plugins came e.g. from universities or schools in the following towns: Belgrad, Berlin, Bochum, Brisbane, Darmstadt, Dubai, Duisburg-Essen, Eindhoven, Hagenberg, Jena, Kassel, Klagenfurth, Koblenz, London, Madrid, Mannheim, San Jose, Siegen, Utrecht, Warsaw.〔''(Presentation given at workshop in Norway lists the contributors on page 7 )''〕 Currently 4 versions of CrypTool are maintained and developed. The CrypTool 1 (CT1) software is available in 6 languages (English, German, Polish, Spanish, Serbian, and Greek). A project for a French version was begun end of 2013. CrypTool 2 (CT2), JCrypTool (JCT) and CrypTool-Online (CTO) are available in English and German.〔''(CrypTool 1 download page )''〕 The goal of the CrypTool project is to make users aware of how cryptography can help against network security threats and to explain the underlying concepts of cryptology.〔CrypTool webpage: ''(CrypTool for Awareness )''.〕 The current release version of CT1, CrypTool 1.4.30, was published in August 2010. It is written in C++ and designed for the Microsoft Windows operating system. A port of CrypTool 1 to Linux with Qt4 was started, but currently there is no progress.〔''(CrypTooLinux project )'', porting CT1 to Linux.〕 In 2007, development began on two additional projects, both based on a pure-plugin architecture, to serve as successors to the original CrypTool program. Both successors regularly publish new stable betas: * CrypTool 2〔CrypTool 2.0: ''(Developer site of the CT2 project )'' Besides release and beta versions nightly builds are produced permanently.〕〔CrypTool 2.0: ''(Facebook Site of the CT2 project )''〕 (built with C#/.NET/WPF) (abbreviated CT2) :uses the concept of visual programming to clarify cryptographic processes. Currently CT2 contains more than 100 crypto functions. The current release version of CT2, CrypTool 2.0, was published in August 2014. * JCrypTool 1.0〔JCrypTool 1.0: ''(GitHub project of JCT )'' Beta versions are updated as weekly builds.〕〔JCrypTool 1.0: ''(Site of the JCT project )''〕 (built with Java/Eclipse/RCP/SWT) (abbreviated JCT) :runs on Windows, MacOS, and Linux, and offers both a document-centric and a function-centric perspective. Currently JCT contains more than 100 crypto functions. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「CrypTool」の詳細全文を読む スポンサード リンク
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