Question: Q 4 . ( a ) The Playfair cipher is used with the keyword barcelona to encrypt the message Meet agent Yullov at the Auberge

Q4.(a) The Playfair cipher is used with the keyword "barcelona" to encrypt the message "Meet agent Yullov at the Auberge Restaurant". Find the ciphertext.
(b) The Playfair cipher of part (a) was used to produce the following ciphertext:
MAXHNVGLBERCCXSIHBXSGBBCACMRDERQRZ
Decode this message.
Q4.(a) The Playfair cipher is used with the keyword "barcelona" to

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