Network Security - Quiz 2 BITS WILP - Mtec Software Systems - 2017

Network Security - Quiz 2

BITS WILP - Mtec Software Systems - 2017

1. "RC4" is a block cipher
Select one:
True
False

Ans: False

2. In Cipher Block Chaining mode any ciphertext block depends on all previous plaintext blocks (except the first block)
Select one:
True
False

Ans: True

3. Electronic Code Book Mode can be parallelize

Select one:
True
False

Ans: True

4. In AES speed of decryption of a ciphertext is same as the speed of encryption of a plaintext when the on-the-fly generation of subkeys is used.

Select one:
True
False

Ans: False

5. In "AES", diffusion is achieved by MixColumn layer only.
Select one:
True
False

Ans: False

6. AES is a modern block cipher with block size 128 / 192 / 256 bits.

Select one:
True
False

Ans: False

7. OTP is unconditionally secure if key is used once.

Select one:
True
False

Ans: True

8. Cipher Block Chaining Mode has Probabilistic approach

Select one:
True
False

Ans: True

9. Electronic Code Book Mode has Deterministic approach

Select one:
True
False

Ans: True

10. Cipher Block Chaining Mode can be parallelize

Select one:
True
False

Ans: False

11. AES is a 128/192/256 key bits cipher.

Select one:
True
False

Ans: True

12. AES have a Feistel structure.
Select one:
True
False

Ans: False

13. In "AES", confusion is achieved in ShiftRows layer
Select one:
True
False

Ans: False

14. "AES" is a block cipher
Select one:
True
False

Ans: True

15. The Electronic Code Book  mode is susceptible to substitution attacks

Select one:
True
False

Ans: True

16. AES layers computations are based on Galois field.
Select one:
True
False

Ans: True