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Welcome to the Number Theory and Cryptography MCQs Page

Dive deep into the fascinating world of Number Theory and Cryptography with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Number Theory and Cryptography, a crucial aspect of Discrete Mathematics. In this section, you will encounter a diverse range of MCQs that cover various aspects of Number Theory and Cryptography, 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 Discrete Mathematics.

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Check out the MCQs below to embark on an enriching journey through Number Theory and Cryptography. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Discrete Mathematics.

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

Number Theory and Cryptography MCQs | Page 13 of 13

Q121.
_______ is an example of asymmetric ciphers.
Discuss
Answer: (b).RSA encryption
Q122.
There is no secret key in case of ____________
Discuss
Answer: (a).Symmetric ciphers
Q123.
Suppose in order to get a message across enemy lines, we need to choose an initial secret key say, 100110. What will be the decrypted cipher when the original message is 010010011.
Discuss
Answer: (a).110100
Q124.
Electronic Code Book process is used in ________
Discuss
Answer: (c).block cipher
Q125.
______ uses the concept of pseudo-random sequence.
Discuss
Answer: (a).Stream cipher
Q126.
How many bits are there for random bits and error detection bits in the case of DES block ciphers?
Discuss
Answer: (b).56, 8
Discuss
Answer: (a).expansion, mixing, substitution, permutation
Q128.
What type of algorithm does AES encryption use?
Discuss
Answer: (b).Symmetric block cipher
Q129.
What is the block size of blowfish block cipher?
Discuss
Answer: (a).64 bits
Q130.
In which cipher each letter of the plaintext is substituted by any other letter to form the cipher message?
Discuss
Answer: (a).Shift cipher
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