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The Round Constant is given by S[8(r-1)+j]. What are the limits of ‘r’?

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The Round Constant is given by S[8(r-1)+j]. What are the limits of ‘r’?

(a) 0 <= r <= 11

(b) 0 <= r <= 12

(c) 0 <= r <= 10

(d) 0 <= r <=16

I got this question during a job interview.

My doubt is from Whirlpool Algorithm topic in portion Message Authentication Codes, Whirlpool Algorithm and Key Management and Distribution of Cryptograph & Network Security

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Right answer is (c) 0 <= r <= 10

Explanation: r can have values from 0 to 10.

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