CrypTool

The development of CrypTool started in 1998. Originally developed by German companies and universities, it is an open-source project since 2001.{{cite web |last1=Esslinger |first1=Bernhard |title=CrypTool: Modern open-source e-learning programs for cryptography and cryptanalysis |url=https://www.frisc.no/wp-content/uploads/2013/04/finse2013-esslinger.pdf |website=Forum for Research and Innovation in Security and Communications |accessdate=26 September 2018 |date=23 April 2013}}

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 French). CrypTool 2 (CT2), JCrypTool (JCT), and CrypTool-Online (CTO) are available in English and German.{{Cite web |title=CT1 Downloads - CrypTool |url=https://www.cryptool.org/en/ct1/downloads/ |access-date=2024-09-04 |website=www.cryptool.org}}

CrypTool 2 builds upon its predecessor, CrypTool 1 by introducing more cryptographic types and analysis tools.

{{Cite web|title=Thesis of Rachel J. McRae|url=https://local.cis.strath.ac.uk/wp/extras/msctheses/papers/strath_cis_publication_2747.pdf}}

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.{{cite web |title=CrypTool for Awareness |website=CrypTool Portal |url=https://www.cryptool.org/en/ctp-education/awareness |accessdate=26 September 2018}}

CrypTool 1 (CT1) is written in C++ and designed for the Microsoft Windows operating system.

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 versions:

• CrypTool 2CrypTool 2: [https://www.cryptool.org/trac/CrypTool2/wiki/WikiStart Developer site of the CT2 project] Besides release and beta versions, each day a so called "Nightly Build" is produced for download.CrypTool 2: [https://www.facebook.com/CrypTool2 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 150 crypto functions.

File:Keysearcher.png

• JCrypTool 1.0JCrypTool 1.0: [https://github.com/jcryptool GitHub project of JCT] Beta versions are updated each weekend as so called "Weekly Builds" for download.JCrypTool 1.0: [http://www.cryptool.org/en/jcryptool 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. One of its focal points are modern digital signatures (like Merkle trees and SPHINCS).

The CrypTool project is now being developed at the research institute CODE at the Bundeswehr University Munich.{{cite web |title=Kryptografie-Lernsoftware CrypTool wird jetzt an der Bundeswehr-Uni in München weiterentwickelt |url=https://www.secupedia.de/news/kryptografie-lernsoftware-cryptool-wird-jetzt-an-der-bundeswehr-uni-in-muenchen-weiterentwickelt/ |access-date=29 August 2024 |website=Secupedia|date=8 May 2023 }}

CrypTool is used in schools, universities,{{cite journal |first1=Sasa |last1=Adamovic |first2=Marko |last2=Sarac |first3=Mladen |last3=Veinovic |first4=Milan |last4=Milosavljevic |first5=Aleksandar |last5=Jevremovic |title=An Interactive and Collaborative Approach to Teaching Cryptology |journal=Educational Technology & Society |year=2014 |volume=17 |issue=1 |pages=197–205 |jstor=jeductechsoci.17.1.197}} companies and agencies for education and awareness training.{{cite web |title=Winter School in Information Security. Overview presentation, Finse 1222, April 21-26, 2013 |url=http://www.frisc.no/arrangementer/finse-winter-school-2013/ |website=Forum for Research and Innovation in Security and Communications |accessdate=26 September 2018 |date=6 February 2013}}{{Cite FTP |last1=Eckert |first1=Claudia |author1-link=Claudia Eckert (computer scientist)|last2=Clausius |first2=Thorsten |last3=Esslinger |first3=Bernd |last4=Schneider |first4=Jorg |last5=Koy |first5=Henrik |title=CrypTool, 2003-08-07 |url=ftp://ftp.etech.haw-hamburg.de/pub/Cryptool/CrypToolPresentation_1_3_05_en.pdf |server=Technische Universitaet Darmstadt |url-status=dead |accessdate=26 September 2018 }}{{cite web |last1=Kopal |first1=Nils |title=Solving Classical Ciphers with CrypTool 2 |url=http://www.ep.liu.se/ecp/149/010/ecp18149010.pdf |website=Linköping University Electronic Press |accessdate=26 September 2018}}{{cite news |last1=Ronald |first1=Kenneth |title=Crypto Casino |url=https://coinplay.com |access-date=14 January 2024}}

{{Portal|Free and open-source software}}

• Asymmetric key algorithm
• Topics in cryptography
• Cryptosystem

{{reflist}}

• {{official website|http://www.cryptool.org/}}
• [http://www.cryptool-online.org CrypTool-Online]
• [http://www.mysterytwisterc3.org International Cipher Contest "MysteryTwister" (MTC3)]
• [http://www.cryptool.org/images/ct1/presentations/CrypTool1 – presentation-en.pdf Presentation about the CrypTool-1 program] with more than 100 slides and many screenshots

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