CS627 Quiz 1

Q1. Which type of cipher uses a random key that is only used once?

1. Caesar cipher
2. Rail fence cipher
3. One-time pad cipher
4. Vigenere cipher

Correct answer: One-time pad cipher

Q2. What is the purpose of cryptography?

1. To provide entertainment to people
2. To provide a way to communicate without encryption
3. To provide a way to store data without encryption
4. To provide secure communications in the presence of an adversary/attacker

Correct answer: To provide secure communications in the presence of an adversary/attacker

Q3. Which type of attack involves using a pre-computed table to crack passwords?

1. Brute force attack
2. Rainbow table attack
3. Social engineering attack
4. Dictionary attack

Correct answer: Rainbow table attack

Q4. Which type of cipher uses a keyword to encrypt plaintext?

1. Vigenere cipher
2. One-time pad cipher
3. Rail fence cipher
4. Caesar cipher

Correct answer: Vigenere cipher

Q5. Which of the following is a common method for user authentication?

1. Password-based authentication
2. All of the given
3. Biometric authentication
4. Multi-factor authentication

Correct answer: All of the given

Q6. What does RBAC stand for?

1. Role-Based Authorization Control
2. Role-Based Access Control
3. Restricted-Budget Access Control
4. Resource-Based Access Control

Correct answer: Role-Based Access Control

Q7. What is the minimum key length required for RSA encryption?

1. 1024 bits
2. 56 bits
3. 128 bits
4. 512 bits

Correct answer: 1024 bits

Q8. Which type of attack involves attempting to recover a password by trying all possible combinations?

1. Rainbow table attack
2. Replay attack
3. Brute force attack
4. Dictionary attack

Correct answer: Brute force attack

Q9. Which type of encryption uses the same key for both encryption and decryption?

1. Asymmetric encryption
2. Symmetric encryption
3. Steganography
4. Hashing

Correct answer: Symmetric encryption

Q10. Which type of cipher replaces each letter with another letter based on a fixed shift value?

1. Rail fence cipher
2. One-time pad cipher
3. Vigenere cipher
4. Caesar cipher

Correct answer: Caesar cipher