Question

The output of the N 1024-bit blocks from the Nth stage is

(a) 512 bits

(b) 1024 bits

(c) N x 1024bits

(d) N x 512 bits

This question was posed to me at a job interview.

Origin of the question is Secure Hash Algorithms (SHA) in division Other Public Key Cryptosystems and Cryptographic Hash Functions of Cryptograph & Network Security

Answer 1

The correct option is (a) 512 bits

To explain I would say: The message digest output is 512-bits.