BCS515B CNS Quiz-1

What is the main goal of cryptography?

• To store data in the cloud

• To make data unreadable to unauthorized people

• To speed up computer performance

• To delete old files

Which of these is an example of symmetric encryption?

• RSA

• AES

• Diffie–Hellman

• ECC

In symmetric encryption, the same key is used for:

• Encryption only

• Decryption only

• Both encryption and decryption

• Generating passwords

Which cipher shifts each letter by a fixed number?

• Playfair cipher

• Caesar cipher

• Vigenère cipher

• Hill cipher

Which of the following is NOT a type of cryptographic attack?

• Brute force

• Man-in-the-middle

• Timing attack

• Firewall attack

Which encryption type uses a pair of keys (public and private)?

• Symmetric encryption

• Asymmetric encryption

• Hashing

• Steganography

What does “plaintext” mean in cryptography?

• Encrypted message

• Original readable message

• Random noise

• Digital signature

Which of the following is a block cipher?

• RC4

• AES

• One-Time Pad

• Vigenère cipher

What is the full form of DES?

• Digital Encryption System

• Data Encryption Standard

• Data Encoding Scheme

• Distributed Encryption Setup

Which of these is an example of a hash function?

• RSA

• AES

• SHA-256

• ECC