Wednesday 3 June 2020

UGC NET Computer Science December 2019 | Question 140

Question 140
The Data Encryption Standard (DES) has a function consists of four steps. Which of the following is correct order of these four steps?
  1. 1. an expansion permutation, S-boxes, an XOR operation, a straight permutation
  2. 2. an expansion permutation, an XOR operation, S-boxes, a straight permutation
  3. 3. a straight permutation, S-boxes, an XOR operation, an expansion permutation
  4. 4. a straight permutation, an XOR operation, S-boxes, an expansion permutation
Answer : 2. an expansion permutation, an XOR operation, S-boxes, a straight permutation

Explanation Question 140



Reference : Data Encryption Standard - Round Function

Steps inside DES Round Function are an expansion permutation, an XOR operation, S-boxes, a straight permutation.

So, option 2 is correct answer

PreviousNext
UGC NET CS December 2019 - Question 139UGC NET CS December 2019 - Question 141

No comments:

Post a Comment

UGC NET Computer Science December 2019 | Question 16

Question 16 In a certain coding language. 'AEIOU' is written as 'TNHDZ'. Using the same coding language. 'BFJPV' wil...

Popular Posts