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Vigenère Tableau

Vigenère Tableau. Reference Matt Bishop, Computer Security , Addison Wesley, 2003. Vigenère Tableau. The Vigenère tableau is an example of an efficient implementation of the Vigenère cipher. An equivalent algorithm would be Ci = (Mi + Ki) mod 26

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Vigenère Tableau

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  1. Vigenère Tableau • Reference • Matt Bishop, Computer Security, Addison Wesley, 2003.

  2. Vigenère Tableau • The Vigenère tableau is an example of an efficient implementation of the Vigenère cipher. • An equivalent algorithm would be • Ci = (Mi + Ki) mod 26 • Where Ci,Mi, and Ki are all integers from 0,..,25, and i is an index for the ciphertext sequence and the key sequence.

  3. Vigenère Tableau (p.2) • An equivalent table is made up of A-Z as the first row, a shift of 1 letter for the second row, and so on. • The columns and rows are labeled A-Z, and represent the plaintext and key character. • The ciphertext is found by indexing into the table.

  4. Vigenère Tableau (p.3)

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