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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.

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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 3 of 4

Q21.
The number of tests required to break the DES algorithm are
Discuss
Answer: (d).7.2×10^16
Q22.
The number of tests required to break the Double DES algorithm are
Discuss
Answer: (b).2111
Q23.
How many keys does the Triple DES algorithm use?
Discuss
Answer: (c).2 or 3
Q24.
In triple DES, the key size is ___ and meet in the middle attack takes ___ tests to break the key.
Discuss
Answer: (d).2168,2112
Q25.
Using Differential Crypt-analysis, the minimum computations required to decipher the DES algorithm is
Discuss
Answer: (d).2^47
Q26.
Using Linear Crypt-analysis, the minimum computations required to decipher the DES algorithm is
Discuss
Answer: (b).2^43
Q27.
What is the size of the key in the SDES algorithm?
Discuss
Answer: (d).10 bits
Q28.
Assume input 10-bit key, K: 1010000010 for the SDES algorithm. What is K1?
Discuss
Answer: (a).10100100
Q29.
Assume input 10-bit key, K: 1010000010 for the SDES algorithm. What is K2?
Discuss
Answer: (b).01000011
Q30.
The Ciphertext for the Plaintext 01110010, given that the keys K1 is 10100100 and K2 is 01000011 is
Discuss
Answer: (a).01110111
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