Cryptography Block Cipher Systems Online Exam Quiz
Cryptography Block Cipher Systems GK Quiz. Question and Answers related to Cryptography Block Cipher Systems. MCQ (Multiple Choice Questions with answers about Cryptography Block Cipher Systems
If the key is 110100001, the output of the SP network for the plaintext: 101110001 is
Options
A : 110100011
B : 110101110
C : 010110111
D : 011111010
What is the number of possible 3 x 3 affine cipher transformations ?
Options
A : 168
B : 840
C : 1024
D : 1344
If the block size is ‘s’, how many affine transformations are possible ?
Options
A : 2s (2s-1)(2s-1)(2s-12)………(2s-1(s-1))
B : 2s (2s-1)(2s-2)(2s-22)………(2s-2(s-2))
C : 2ss (2s-1)(2s-2)(2s-22)………(2s-2(s-1))
D : 2s (2s-1)(2s-2)(2s-22)………(2s-2(s-3))
In affine block cipher systems if f(m)=Am + t, what is f(m1+m2+m3) ?
Options
A : f(m1) + f(m2) + f(m3) + t
B : f(m1) + f(m2) + f(m3) +2t
C : f(m1) + f(m2) + f(m3)
D : 2(f(m1) + f(m2) + f(m3))
In affine block cipher systems if f(m)=Am + t, what is f(m1+m2) ?
Options
A : f(m1) + f(m2) + t
B : f(m1) + f(m2) + 2t
C : f(m1) + t
D : f(m1) + f(m2)
Super-Encipherment using two affine transformations results in another affine transformation.
Options
A : True
B : False
C :
D :
The S-Box is used to provide confusion, as it is dependent on the unknown key.
Options
A : True
B : False
C :
D :
Confusion hides the relationship between the ciphertext and the plaintext.
Options
A : True
B : False
C :
D :
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