Question: 4. We received the following ciphertext which was encoded with a mono alphabet shift cipher: xultpaajcxitltlxaarpjhtiwtgxktghidhipxciwtvgtpilpitghlxiwiwtxgqadds (a). Perform an attack against the cipher based

4. We received the following ciphertext which was encoded with a mono alphabet shift cipher: xultpaajcxitltlxaarpjhtiwtgxktghidhipxciwtvgtpilpitghlxiwiwtxgqadds (a). Perform an attack against the cipher based on a letter frequency count: How many letters do you have to identify through a frequency count to recover the key? What is the cleartext? (b). Who wrote this message? (10 marks)

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