Question

In SDES, Encryption algorithm can be  written as a composition of functions:

(a) IP-1 o fK2 o fK1 o SW o IP

(b) True

(c) False

This question was addressed to me in exam.

I'm obligated to ask this question of The Simplified Data Encryption Standard (SDES) in portion Block Ciphers and the Data Encryption Standard of Cryptograph & Network Security

Answer 1

Right option is (b) True

To elaborate: The SDES algorithm follows the order – IP-1 o fK2 o SW o fK1 o IP.