CNS-Quiz

Encryption Strength is based on

• 1. Strength of algorithm

• 1. Length of key

• 1. Secrecy of key

• 1. All of the above

In cryptography, the order of letters in a message is rearranged by

• 1. Transpositional ciphers

• 1. Substitution ciphers

• 1. Both (A) and (B)

• 1. Quadratic ciphers

In public key encryption, if A wants to send an encrypted message

• 1. A encrypts message using B’s public key

• 1. A encrypts message using his private key

• 1. A encrypts message using B’s private key

• 1. A encrypts message using his public key

What is data encryption standard (DES)?

• 1. Bit cipher

• 1. Stream cipher

• 
  Block cipher

• 1. Byte cipher

Which of the 4 operations are false for each round in the AES algorithm
i) Substitute Bytes
ii) Shift Columns
iii) Mix Rows
iv) XOR Round Key

• i) only

• ii) iii) and iv)

• ii) and iii)

• only iv)

gcd( 18,300)

7³ mod 19

Which one of the following is not an application hash functions?

• One-way password file

• Key wrapping

• Virus Detection

• Intrusion detection

How many rounds are present in each iteration function of SHA-3?

• 3

• 4

• 5

• 6

A file is created by a certain user, who becomes its owner. The owner can choose to provide access to this file to other users. If file data confidentiality is desired, the owner should control who has…

• Read access to the file

• Write access to the file

• Both read and write access to the file

• None of the above