https://github.com/olemorud/vigenere-cracker

Crack vigenere encrypted text using index of coincidence and character frequencies.
https://github.com/olemorud/vigenere-cracker

cipher vigenere-decoder

Last synced: 23 days ago
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Crack vigenere encrypted text using index of coincidence and character frequencies.

• Host: GitHub
• URL: https://github.com/olemorud/vigenere-cracker
• Owner: olemorud
• Created: 2024-08-22T22:39:27.000Z (5 months ago)
• Default Branch: master
• Last Pushed: 2024-09-05T02:44:25.000Z (4 months ago)
• Last Synced: 2024-09-06T09:13:38.449Z (4 months ago)
• Topics: cipher, vigenere-decoder
• Language: C
• Homepage:
• Size: 2.61 MB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        

# Vigenère cipher solver

Uses index of coincidence and frequency analysis to find Vigenère cipher keys

from ciphertexts.

## Build

```bash

make

```

Binary will be written to `./build/solve`

## Example usage

```

./build/solve txt/shakespeare-encrypted.txt

```

## References

[Vigenère cipher](https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher)

[Index of Coincidence](https://en.wikipedia.org/wiki/Index_of_coincidence)

[Frequency analysis](https://en.wikipedia.org/wiki/Frequency_analysis)