Data Integrity Algorithms Questions and Answers – Whirlpool Algorithm – II

This set of Cryptography Multiple Choice Questions & Answers (MCQs) focuses on “Whirlpool Algorithm- 2”.

1. What is the correct order of operation within each round of the Whirlpool algorithm?
a) Add round key, Substitute bytes, Mix rows, Shift columns
b) Substitute bytes, Add round key, Shift columns, Mix rows
c) Mix rows, Substitute bytes, Shift columns, Add round key
d) Substitute bytes, Shift columns, Mix rows, Add round key
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2. What is the size of the s-box table/matrix in Whirlpool?
a) 8 × 8
b) 16 × 16
c) 8 × 16
d) 16 × 8
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3. The S-box implements linear mapping thus providing diffusion.
a) True
b) False
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4. Another name for the Whirlpool key is
a) CState
b) LState
c) Estate
d) KState
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5. How many round constants (RCs) are required in Whirlpool?
a) 10
b) 11
c) 12
d) 21
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6. The Round Constant is dependent on the s-box values.
a) True
b) False
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7. The Round Constant is given by S[8(r-1)+j]. What are the limits of ‘r’?
a) 0 <= r <= 11
b) 0 <= r <= 12
c) 0 <= r <= 10
d) 0 <= r <=16
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8. When the Round Constant is given by S[8(r-1)+j]. What are the limits of ‘i’ and ‘j’?
a) i = 1 ; 0 <= j <= 7
b) i = 0 ; 0 <= j <= 7
c) 0 <= i <= 7; 0 <= j <= 7
d) 0 <= i <= 7; j=0
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9. The 7th row in the 8 × 8 matrix undergoes a ___________ shift.
a) 6 bit
b) 6 byte
c) 7 bit
d) 7 byte
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10. How many XOR gate operations are involved in the S-box permutation?
a) 12
b) 8
c) 16
d) 4
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11. Which round provides linear diffusion in the Whirlpool Algorithm?
a) Add Key
b) Substitute Bytes
c) Mix Rows
d) Shift Rows
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Sanfoundry Global Education & Learning Series – Cryptography and Network Security.

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