Mock Test

Which of the following encryption methods uses a public and private key pair?

• AES

• RSA

• DES

• MD5

Which of the following is not a characteristic of a secure hash function?

• One-way

• Reversible

• Collision-resistant

• Deterministic

What is the primary drawback of symmetric encryption compared to asymmetric encryption?

• It requires longer key lengths for security

• It uses separate keys for encryption and decryption

• Securely sharing the key is challenging

• It is computationally slower

Which of the following best describes a brute force attack?

• Exploiting software vulnerabilities to bypass encryption

• Attempting all possible key combinations to decrypt data

• Intercepting encrypted messages to analyse patterns

• Using a mathematical flaw in an algorithm to break encryption

Why is computational complexity important in the context of cryptography?

• It ensures that cryptographic algorithms are easy to implement and fast to execute.

• It provides a measure of how difficult it is for an attacker to break the encryption using computational resources.

• It ensures that cryptographic keys can be reused multiple times without compromising security.

• It determines the randomness of the encrypted output to make it unreadable.

Which cryptographic principle is compromised in a Man-in-the-Middle (MITM) attack?

• Confidentiality

• Integrity

• Authentication

• All of the above

Which of the following best practices would enhance the security of symmetric key management?

• Use key wrapping to encrypt keys before storing them

• Use the same key for encryption and decryption indefinitely

• Rely solely on password-protected access to the keys

• Rotate symmetric keys only when a breach is suspected

What is the main advantage of using a centralized Key Management System (KMS) in symmetric encryption?

• It reduces the computational cost of encryption

• It eliminates the need for key rotation policies

• It simplifies secure generation, distribution, and storage of keys

• It allows the use of smaller keys without compromising security

What should be done if a symmetric encryption key is suspected to have been compromised?

• Immediately revoke the compromised key and issue a new key

• Continue using the key until the suspicion is confirmed

• Inform clients to stop transmitting encrypted data

• Replace the encryption algorithm instead of the key

Your team is considering using AES encryption for storing sensitive data. Which AES key size is recommended for balancing security and performance?

• 64 bits

• 128 bits

• 512 bits

• 2048 bits