NETWORK SECURITY
INTRODUCTION
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Encrypt “day” with a = 5 and b = 8 using Affine Cipher
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xiy
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jiu
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opj
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gtr
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Explanation:
Detailed explanation-1: -The Playfair cipher uses a 5x5 matrix of letters for encryption/decryption.
Detailed explanation-2: -For an affine cipher mx + n (mod 26), we must have gcd(26, m) = 1, and we can always take 1 ≤ n ≤ 26. – (26)= (2*13)=(2-1)*(13-1)= 12, hence we have 12*26=312 possible keys.
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