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What is the size of W (in bits) in the SHA-512 processing of a single 1024- bit block?

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What is the size of W (in bits) in the SHA-512 processing of a single 1024- bit block?

(a) 64

(b) 128

(c) 512

(d) 256

I had been asked this question at a job interview.

The query is from Secure Hash Algorithms (SHA) topic in chapter Other Public Key Cryptosystems and Cryptographic Hash Functions of Cryptograph & Network Security

1 Answer

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Best answer
Correct answer is (a) 64

For explanation I would say: The 1024 bit message blocks are compressed to form 64 bit values(W).

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