Q.1
In AES, to make the s-box, we apply the transformation –
  • a) ci is the ith bit of byte c with value 0x63
  • b) ci is the ith bit of byte c with value 0x25
  • c) ci is the ith bit of byte c with value 0x8F
  • d) ci is the ith bit of byte c with value 0x8A
Q.2
The inverse s-box permutation follows,
  • a) di is the ith bit of a byte ‘d’ whose hex value is 0x15
  • b) di is the ith bit of a byte ‘d’ whose hex value is 0x05
  • c) di is the ith bit of a byte ‘d’ whose hex value is 0x25
  • d) di is the ith bit of a byte ‘d’ whose hex value is 0x51
Q.3
What is the block size in the Simplified AES algorithm?
  • a) 8 bits
  • b) 40 bits
  • c) 16 bits
  • d) 36 bits
Q.4
Which function can be used in AES multiplication –
  • a) m(x)=x7+x⁴+x³
  • b) m(x)=x8+x⁴+x³+x+1
  • c) m(x)=x8+x³+x²+x+1
  • d) m(x)=x8+x5+x³+x
Q.5
In the DES algorithm the Round Input isbits, which is expanded tobits via ______________
  • a) Scaling of the existing bits
  • b) Duplication of the existing bits
  • c) Addition of zeros
  • d) Addition of ones
Q.6
Using Differential Crypt-analysis, the minimum computations required to decipher the DES algorithm is-
  • a) 256
  • b) 243
  • c) 255
  • d) 247
Q.7
Using SDES, the Plaintext for the Ciphertextgiven that the key isis,
  • a) 01100111
  • b) 00001010
  • c) 11111111
  • d) 01101101
Q.8
Reduce the following Big-O notation. O[ ax7 + 3 x3 + sin(x)] =
  • a) O[ax7].
  • b) O[sin(x)].
  • c) O[x7].
  • d) O[x7 + x³].
Q.9
Reduce the following Big-O notation. O[ en + an=
  • a) O[ an10].
  • b) O[ n10 ].
  • c) O[ en ].
  • d) O[ en+ n10 ].
Q.10
For p =and q =and choose e=Apply RSA algorithm where Cipher message=and thus find the plain text.
  • a) 88
  • b) 122
  • c) 143
  • d) 111
0 h : 0 m : 1 s