Question

Consider the following properties

Variable Input size

Fixed Output size

Efficiency

Pre image resistant

Second Pre image Resistant

Collision resistant

Pseudo randomness

A has function that satisfies the first _______ properties in the above table is referred to as a weak hash function.

(a) 5

(b) 4

(c) 3

(d) 2

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

My question is based upon Hash Functions Based on Cipher Block Chaining topic in section Other Public Key Cryptosystems and Cryptographic Hash Functions of Cryptograph & Network Security

Answer 1

Correct choice is (a) 5

The explanation is: If the sixth property is also satisfied it is referred to as a strong hash function.