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CrypTool 2 provides a variety of cryptanalytical tools to analyze or even break classical and modern ciphers. With the current version you can, for instance, apply a ciphertext-only attack on an Enigma-encrypted ciphertext.

This page is an archive of all current builds of CrypTool 2.
The builds run on 64 Bit Windows. Please note that you need the Microsoft .NET Framework 4.7.2 to run CrypTool 2.
No admin rights are needed for the installation.
Each build is available as an .exe installer and as a compressed zip archive. Both have their own online update mechanism. The .exe installer supports registration of start menu entry, desktop link, and Explorer file type, but does not support more than one .exe installation. If in doubt, use the .exe installer.


Stable versions and releases

The most recent release version of CrypTool 2 is CrypTool 2.1 (Stable Build 8186.5). It and can be downloaded here.

Nightly Builds

Nightly builds are compiled every night based on the most current version of the source code checked into the SVN repository.
Please be aware that these builds are work in progress. They are by no means guaranteed to be stable, and they may contain experimental features that are not yet fully functional.
CrypTool 2.1 (Nightly Build 8505.1) - December-11-2019 01:54:11 - 178.094.813 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8505.1).exe
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CrypTool 2.1 (Nightly Build 8505.1).zip
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CrypTool 2.1 (Nightly Build 8504.1) - December-09-2019 01:54:41 - 178.094.634 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8504.1).exe
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CrypTool 2.1 (Nightly Build 8504.1).zip
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CrypTool 2.1 (Nightly Build 8499.1) - December-08-2019 01:55:03 - 178.087.244 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8499.1).exe
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CrypTool 2.1 (Nightly Build 8499.1).zip
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CrypTool 2.1 (Nightly Build 8498.1) - December-07-2019 02:01:07 - 178.089.009 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8498.1).exe
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CrypTool 2.1 (Nightly Build 8498.1).zip
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CrypTool 2.1 (Nightly Build 8495.1) - December-06-2019 01:54:39 - 178.067.808 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8495.1).exe
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CrypTool 2.1 (Nightly Build 8495.1).zip
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CrypTool 2.1 (Nightly Build 8492.1) - December-03-2019 01:54:38 - 178.063.877 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8492.1).exe
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CrypTool 2.1 (Nightly Build 8492.1).zip
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CrypTool 2.1 (Nightly Build 8491.1) - December-02-2019 01:55:58 - 178.062.422 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8491.1).exe
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CrypTool 2.1 (Nightly Build 8491.1).zip
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CrypTool 2.1 (Nightly Build 8487.1) - December-01-2019 01:56:43 - 178.061.445 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8487.1).exe
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CrypTool 2.1 (Nightly Build 8487.1).zip
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CrypTool 2.1 (Nightly Build 8483.1) - November-30-2019 01:58:26 - 178.039.484 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8483.1).exe
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CrypTool 2.1 (Nightly Build 8483.1).zip
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CrypTool 2.1 (Nightly Build 8480.1) - November-29-2019 21:37:55 - 178.046.825 Byte - ZIP file EXE installer
Setup CrypTool 2.1 (Nightly Build 8480.1).exe
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CrypTool 2.1 (Nightly Build 8480.1).zip
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