27 lines
474 B
Markdown
27 lines
474 B
Markdown
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# Vigenère cipher solver
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Uses index of coincidence and frequency analysis to find Vigenère cipher keys
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from ciphertexts
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## Build
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```bash
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make
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```
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## Example usage
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```
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./build/solve txt/shakespeare-encrypted.txt | head -c 1024
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```
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## References
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[Vigenère cipher](https://en.wikipedia.org/wiki/Vigen%C3%A8re_cipher)
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[Index of Coincidence](https://en.wikipedia.org/wiki/Index_of_coincidence)
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[Frequency analysis](https://en.wikipedia.org/wiki/Frequency_analysis)
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