Question

Which of the following is true for the RC5 algorithm?

i) Has variable number of rounds

ii) Has fixed Key length

iii) High memory Requirements

iv) Uses only primitive computational operations commonly found on microprocessors

(a) i) and iv)

(b) i) ii) and iv)

(c) iv)

(d) i) ii) and iii)

This question was addressed to me by my college director while I was bunking the class.

My question is based upon RC4 and RC5 topic in portion Pseudorandom Number Generation and Stream Ciphers and More Block Ciphers of Cryptograph & Network Security

Answer 1

The correct answer is (a) i) and iv)

Easy explanation: RC5 algorithm can have a variable key length and requires low amount of memory.