Question

encode the following message 'I love New York in June how about you' first apply the vigenere cipher with the key 'june' then apply the permutation 3,2,4,0,1

Answer 1

GIVEN,

I love New York in June how about you - Text

june - key

NOW USING VIGENERE CIPHER ENCRIPTION & TABLE :-

I love New York in June how about you - text

j unej une june    ju neju nej uneju neju - key

r fbzn hra hieo rh wywy usf uosdn l sd - Encrypted text

ENCRYPTED TEXT after VIGENERE CIPHER - r fbzn hra hieo rh wywy usf uosdn lsd

Now applying  permutation 3,2,4,0,1 to above Encryped text :-

( changing the position of each block's letters as 3,2,4,,0,1 .... that means send 1st letter to 3rd possition, 2nd letter to 2rd possition, 3rd letter to 4rth possition, 4st letter to oth possition, 5th letter to 1st possition )

rfbzn hrahi eorhw ywyus fuosd nlsdx - text ( last block padded with 'X' )

ZNFRB HIRHA HWOER USWYY SDUFO DXLNS - Encrypted Text

HENCE, THE RESULTANT ENCRYPTED TEXT IS -

ZNFRBHIRHAHWOERUSWYYSDUFODXLNS