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Understanding the Autokey Cipher by Ali Saddique is a document available to read on EtoBox.
What is Understanding the Autokey Cipher about?
The Autokey Cipher is a polyalphabetic substitution cipher that is similar to the Vigenère cipher but makes the keystream more secure by incorporating plaintext or ciphertext letters into the key. It uses a tabula recta to locate intersections for encryption and decryption based on the plaintext or ciphertext and a cycling key derived from the initial keyword combined with previous cipher or plaintext letters. There are two forms, the key autokey that uses previous ciphertext in the keystream, and the text
- Author
- Ali Saddique
- Language
- EN