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Pseudorandom Number Generation and Stream Ciphers and More Block Ciphers - Principles of PRNG - Quiz No.2

gs gs124 Pseudorandom Number Generation and Stream Ciphers and More Block Ciphers - Principles of PRNG - Quiz No.2

gs gs124 Introduction Cyber Security Quiz

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Question 1: Which among the following cannot be used in the case of stream ciphers?
TRNGs
PRNGs
PRFs
All of the mentioned
Question 2: A stream cipher key is usually of size ___ or 128 bits.
56
64
54
48
Question 3: Which among the following has the lowest bitrate ?
PRF
TRNG
PRNG
All have the same bitrate
Question 4: RC4 was built on the sole purpose of generating random bits i.e. to act as a PRNG.
True
False
Question 5: Maurer’s Universal Statistical Test is –
a test to determine whether the number of runs of ones and zeros of various lengths is as expected
a test to detect if a sequence can be significantly compressed without loss of information
a test to determine whether the number of ones and zeros in a sequence is approx the same as in a truely random o/p
a test for the check of evenness in the 1s and 0s
Question 6: Runs Test is
a test to determine whether the number of runs of ones and zeros of various lengths is as expected
a test to detect if a sequence can be significantly compressed without loss of information
a test to determine whether the number of ones and zeros in a sequence is approx the same as in a truely random o/p
a test for the check of evenness in the 1s and 0s
Question 7: Frequency Test is
a test to determine whether the number of runs of ones and zeros of various lengths is as expected
a test to detect if a sequence can be significantly compressed without loss of information
a test for the check of evenness in the 1s and 0s
a test to determine whether the number of ones and zeros in a sequence is approx the same as in a truely random o/p
Question 8: We should not be able to determine the seed from any previous knowledge of the bits sequence. This is the property of backward unpredictability.
True
False
Question 9: Forward Unpredictability is a property when the seed is unknown, and the next output bit is the sequence should be unpredictable.
True
False

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