Question

The Rho function is defined as : a[x, y, z] ← a[x, y, z-g(t)], where g(t) is defined as

(a) (t+1)(t+2)/2

(b) (t+1)(t-2)/2

(c) (t-1)(t-2)/2

(d) (t-1)(t+2)/2

This question was posed to me in quiz.

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

Answer 1

Right choice is (a) (t+1)(t+2)/2

The explanation is: g(t) is defined as (t+1)(t+2)/2.