Welcome to the Data Encryption Standard MCQs Page

Dive deep into the fascinating world of Data Encryption Standard with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Data Encryption Standard, a crucial aspect of Cryptography and Network Security. In this section, you will encounter a diverse range of MCQs that cover various aspects of Data Encryption Standard, from the basic principles to advanced topics. Each question is thoughtfully crafted to challenge your knowledge and deepen your understanding of this critical subcategory within Cryptography and Network Security.

Check out the MCQs below to embark on an enriching journey through Data Encryption Standard. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Cryptography and Network Security.

Note: Each MCQ comes with multiple answer choices. Select the most appropriate option and test your understanding of Data Encryption Standard. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Data Encryption Standard MCQs | Page 1 of 4

Q1.
In affine block cipher systems if f(m)=Am + t, what is f(m1+m2) ?
Answer: (a).f(m1) + f(m2) + t
Q2.
In affine block cipher systems if f(m)=Am + t, what is f(m1+m2+m3) ?
Answer: (c).f(m1) + f(m2) + f(m3)
Q3.
What is the number of possible 3 x 3 affine cipher transformations ?
Q4.
Super-Encipherment using two affine transformations results in another affine transformation.
Q5.
If the key is 110100001, the output of the SP network for the plaintext: 101110001 is
Q6.
If the key is 110100001 where,
If ki=0, then S_i (x)=((1 1 0 | 0 1 1 | 1 0 0 ))x+((1 1 1))
and If ki=1, then S_i (x)=((0 1 1 | 1 0 1 | 1 0 0))x+((0 1 1))
then the output of the SP network for the plaintext: 101110001 is
Q7.
Confusion hides the relationship between the ciphertext and the plaintext.
Q8.
The S-Box is used to provide confusion, as it is dependent on the unknown key.
Q9.
Which of the following slows the cryptographic algorithm –

1) Increase in Number of rounds
2) Decrease in Block size
3) Decrease in Key Size
4) Increase in Sub key Generation