CNS-2023

USN

Name

_______ is the science and art of transforming messages to make them secure and immune to attacks

• 1. Cryptography

• 1. Calligraphy

• 1. Cryptanalysis

• 1. None of the above

In symmetric-key cryptography, the key locks and unlocks the box is

• different

• same

• private

• public

Encryption Strength is based on

• 1. Length of key

• 1. Secrecy of key

• 1. Strength of algorithm

• 1. All of the above

In asymmetric key cryptography, the private key is kept by ________

• 1. Sender

• 1. Receiver

• 1. All the connected devices to the network

• 1. Sender and receiver

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

The man-in-the-middle attack can endanger the security of the Diffie-Hellman method if two parties are not

• 1. Joined

• 1. Authenticated

• 1. Submit

• 1. Separate

In Cryptography, when text is treated at the bit level, each character is replaced by

• 1. 4 bits

  3. 10 bits

  4. 8 bits

• 1. 6 bits

• 1. 10 bits

• 1. 8 bits