Keyboard shortcuts

Press or to navigate between chapters

Press S or / to search in the book

Press ? to show this help

Press Esc to hide this help

🧩 Vigenere Ciphers 🧩

A Vigenere Cipher is like a substitution cipher, except that we use a different rotation for every letter.

Usually these are based off a phrase or word.

Try encrypting/decrypting

Vigenere Cipher encryption/decryption

breaking vigenere ciphers tips

  • It's really hard!
  • We won't be covering much breaking of them, but feel free to try the following if you have time.
  • Try using techniques from substitution ciphers, with the knowledge that the keys are four letters long.

Examples

Attempt if you dare!

  1. G xuzc fa vm fa rmybrjgn lmdwhfabh yzp wyhq usz! Fwge ytqemvc ue hsbqg jazv ra majai icotcgcgtq.
  2. O pir ibcrz gw xka! Wrk ges zuzik swyx sqzk fqb yrdit rqkng vmtr bit.