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What is the value of ipad in the HMAC structure?

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What is the value of ipad in the HMAC structure?

(a) 00111110

(b) 00110010

(c) 10110110

(d) 01110110

The question was asked in an interview for job.

My question is taken from HMAC, DAA and CMAC topic in division Message Authentication Codes, Whirlpool Algorithm and Key Management and Distribution of Cryptograph & Network Security

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Right option is (b) 00110010

Explanation: ipad is 36 in hexadecimal.

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