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Question

The plaintext message consist of single letters with 5-bit numerical equivalents from (00000)2 to (11001)2. The secret deciphering key is the superincreasing 5-tuple (2, 3, 7, 15, 31), m = 61 and a = 17. Find the ciphertext for the message “WHY”.

a.

C= (148, 143, 50)

b.

C= (148, 143, 56)

c.

C= (143, 148, 92)

d.

C= (148, 132,92)

Answer: (a).C= (148, 143, 50)

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Q. The plaintext message consist of single letters with 5-bit numerical equivalents from (00000)2 to (11001)2. The secret deciphering key is the superincreasing 5-tuple (2, 3, 7, 15,...

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