This is the Windows app named Vigenere Dictionary Attack whose latest release can be downloaded as VDA_1-0.zip. It can be run online in the free hosting provider OnWorks for workstations.
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Vigenere Dictionary Attack
DESCRIPTION:
This is a tool that uses a combination between a brute force and dictionary attack on a Vigenere cipher.
At present, keys are generated using brute force (will soon try passwords generated from a dictionary first).
Each key is then used to decode the encoded message input. The output is analysed and then put into a ranking table. Outputs will be ranked on a variety of factors (at present, only number of dictionary words in output are counted).
For the future:
Better key generation, trying combinations of dictionary words with numbers. If that fails, brute force will be used.
For all attempts of the dictionary attack, only keys within the known key length range will be generated.
Better ranking system and analysis of possible decoded messages.
Note:
The version currently released, I made in an evening! It is nowhere near ready for release but is a fun project to think about and I need more ideas for improvements mentioned above.
Discuss possible solutions and ideas!
Audience
Developers, Security Professionals
User interface
Command-line
Programming Language
Visual Basic .NET
This is an application that can also be fetched from https://sourceforge.net/projects/vigdicattack/. It has been hosted in OnWorks in order to be run online in an easiest way from one of our free Operative Systems.