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Welcome to the Pseudorandom Number Generation and Stream Ciphers MCQs Page

Dive deep into the fascinating world of Pseudorandom Number Generation and Stream Ciphers with our comprehensive set of Multiple-Choice Questions (MCQs). This page is dedicated to exploring the fundamental concepts and intricacies of Pseudorandom Number Generation and Stream Ciphers, a crucial aspect of Cryptography and Network Security. In this section, you will encounter a diverse range of MCQs that cover various aspects of Pseudorandom Number Generation and Stream Ciphers, 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 Pseudorandom Number Generation and Stream Ciphers. Test your knowledge, expand your horizons, and solidify your grasp on this vital area of Cryptography and Network Security.

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Pseudorandom Number Generation and Stream Ciphers MCQs | Page 8 of 9

Q71.
Which of the following is true for the RC5 algorithm?

i) Has variable number of rounds
ii) Has fixed Key length
iii) High memory Requirements
iv) Uses only primitive computational operations commonly found on microprocessors
Discuss
Answer: (a).i) and iv)
Q72.
What are the allowable values of word size in bit for RC5 algorithm?
Discuss
Answer: (b).16, 32, 64
Q73.
The number of rounds in RC5 can range from 0 to _____________
Discuss
Answer: (c).255
Q74.
The standard/nominal version of the RC5-w/r/b has parameters w/r/b as
Discuss
Answer: (c).32/12/16
Q75.
The total number of subkeys t used in the RC5 algorithm is given by the formula (r corresponds to number of rounds)
Discuss
Answer: (c).t=2r+2
Discuss
Answer: (a).Base of natural Logarithm and Golden ratio
Q77.
The value of the base of natural logarithms is
Discuss
Answer: (b).e= 2.7183
Q78.
The value of the golden ratio is
Discuss
Answer: (d).ᶲ =1.618
Q79.
Calculate the number of subkeys required in RC5 for 18 rounds of computation.
Discuss
Answer: (b).38
Q80.
RC5 encryption uses Right shift and decryption uses Left shift.
Discuss
Answer: (b).False
Page 8 of 9

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