Question

In SHA-512, the message is divided into blocks of size ___ bits for the hash computation.

(a) 1024

(b) 512

(c) 256

(d) 1248

This question was addressed to me in a national level competition.

I would like to ask this question from Secure Hash Algorithms (SHA) in chapter Other Public Key Cryptosystems and Cryptographic Hash Functions of Cryptograph & Network Security

Answer 1

Right option is (a) 1024

To explain: The message is divided into blocks of size 1024 bits, and the output produced is a 512-bit message digest.