Shannon's Principle of Confusion Substitution Cipher MESSAGE FROM MARY STUART KILL THE QUEEN Substitution Table-Caesar's Cipher ABCDEEGHIUKLMNOPORSTUVWXYZ DEFGHIJKLMNOPQRSTUVWXYZABC key =3 Cyclic shifts PHVD JHIUR PPDUB VWDU WNLOO WKHTX HHQ General substitution table ABCDEFGHIJKLMNOPORSTUVWXYZ EYUOBMDXVTHIUPRCNAKQLSGZEW 26! possible keys JBKKE DBMAR UJEAF KOLEA QHVII OXBNL BBP 88 ABCDEFGHIJKLMNOPQRSTUVWXYZ DEFGHIJKLMNOPQRSTUVWXYZABC Substitution Table - Caesar‘s Cipher Shannon‘s Principle of Confusion Substitution Cipher MESSAGE FROM MARY STUART KILL THE QUEEN PHVVD JHIUR PPDUB VWXDU WNLOO WKHTX HHQ PHVVD J PHVVD key = 3 cyclic shifts ABCDEFGHIJKLMNOPQRSTUVWXYZ EYUOBMDXVTHIJPRCNAKQLSGZFW General Substitution Table 26! possible keys JBKKE DBMAR JJEAF KQLEA QHVII QXBNL BBP