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Welcome to the Cryptography Basics MCQs Page

Dive deep into the fascinating world of Cryptography Basics with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Cryptography Basics, a crucial aspect of Cryptography and Network Security. In this section, you will encounter a diverse range of MCQs that cover various aspects of Cryptography Basics, 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 Cryptography Basics. 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 Cryptography Basics. You can click on an option to test your knowledge before viewing the solution for a MCQ. Happy learning!

Cryptography Basics MCQs | Page 3 of 11

Q21.
In AES, to make the s-box, we apply the transformation –

b’i = bi XOR b(i+4) XOR b(i+5) XOR b(i+6) XOR b(i+7) XOR ci
What is ci in this transformation?
Discuss
Answer: (a).ci is the ith bit of byte c with value 0x63
Discuss
Answer: (b).di is the ith bit of a byte ‘d’ whose hex value is 0x05
Q23.
In the DES algorithm the Round Input is 32 bits, which is expanded to 48 bits via ______________
Discuss
Answer: (a).Scaling of the existing bits
Q24.
Using Differential Crypt-analysis, the minimum computations required to decipher the DES algorithm is-
Discuss
Answer: (d).2^47
Q25.
Using SDES, the Plaintext for the Ciphertext 00001111, given that the key is 1111111111 is,
Discuss
Answer: (c).11111111
Q26.
A substitution cipher substitutes one symbol with
Discuss
Answer: (b).Others
Q27.
An asymmetric-key (or public-key) cipher uses
Discuss
Answer: (b).2 Key
Q28.
A straight permutation cipher or a straight P-box has the same number of inputs as
Discuss
Answer: (c).Outputs
Q29.
We use Cryptography term to transforming messages to make them secure and immune to
Discuss
Answer: (c).Attacks
Q30.
The man-in-the-middle attack can endanger the security of the Diffie-Hellman method if two parties are not
Discuss
Answer: (a).Authenticated
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