Vigenere cipher breaker

This online calculator tries to decode Vigenere cipher without knowing the key. It uses the index of coincidence technique.

Creative Commons Attribution/Share-Alike License 3.0 (Unported)

This content is licensed under Creative Commons Attribution/Share-Alike License 3.0 (Unported). That means you may freely redistribute or modify this content under the same license conditions and must attribute the original author by placing a hyperlink from your site to this work https://planetcalc.com/7948/. Also, please do not modify any references to the original work (if any) contained in this content.

Articles that describe this calculator

PLANETCALC, Vigenere cipher breaker

Vigenere cipher breaker

Frequency of Letters

Items per page:

Decoded message
Decoded with guess key
The file is very large. Browser slowdown may occur during loading and creation.
URL copied to clipboard
Creative Commons Attribution/Share-Alike License 3.0 (Unported) PLANETCALC, Vigenere cipher breaker