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How many XOR gate operations are involved in the S-box permutation?

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How many XOR gate operations are involved in the S-box permutation?

(a) 12

(b) 8

(c) 16

(d) 4

I had been asked this question in homework.

Origin of the question is Whirlpool Algorithm topic in chapter Message Authentication Codes, Whirlpool Algorithm and Key Management and Distribution of Cryptograph & Network Security

1 Answer

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Best answer
Right option is (a) 12

The explanation is: 12 XORs are involved in the S-box permutation in Whirlpool.

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