COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK SECURITY AND CYBERSECURITY
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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 first step in encrypting the message is to write the numeric values of each letter. Now, take each value of x, and solve the first part of the equation, (5x + 8). After finding the value of (5x + 8) for each character, take the remainder when dividing the result of (5x + 8) by 26.
Detailed explanation-2: -Here (9, 15) is the decryption key for the affine cipher with encryption key (3, 7). y + 19 ≡ 3x (mod 26). 9(y + 19) ≡ 9 · 3x ≡ x (mod 26).
Detailed explanation-3: -The Playfair cipher uses a 5x5 matrix of letters for encryption/decryption.
There is 1 question to complete.