Cyber Security Essentials MCQs

1. Which of the following is a symmetric encryption algorithm?

a) RSA b) AES c) ECC d) Diffie-Hellman

2. What is the primary purpose of a cryptographic hash function?

a) To encrypt data b) To generate a fixed-size output from variable-size input c) To create digital signatures d) To establish secure communication channels

3. Which of the following is an asymmetric encryption algorithm?

a) AES b) SHA-256 c) RSA d) HMAC

4. What is the key length of AES-256?

a) 128 bits b) 192 bits c) 256 bits d) 512 bits

5. Which cryptographic algorithm is used for secure key exchange?

a) RSA b) AES c) Diffie-Hellman d) SHA-256

6. What is the primary purpose of a Certificate Authority (CA) in PKI?

a) To encrypt data b) To issue and manage digital certificates c) To generate symmetric keys d) To create hash values

7. What is contained in a digital certificate?

a) A private key b) A public key and identity information c) A symmetric key d) A hash value

8. What is the role of a Registration Authority (RA) in PKI?

a) To issue digital certificates b) To verify the identity of certificate applicants c) To encrypt data d) To generate hash values

9. What is the purpose of a Certificate Revocation List (CRL)?

a) To list all valid certificates b) To list revoked certificates c) To encrypt data d) To generate symmetric keys

10. What is the primary purpose of a digital signature?

a) To encrypt data b) To verify the authenticity and integrity of a message c) To generate hash values d) To establish secure communication channels

11. What is the purpose of SSL/TLS in cryptographic solutions?

a) To encrypt data in transit b) To generate hash values c) To create digital signatures d) To manage digital certificates

12. What is the primary use of HMAC (Hash-based Message Authentication Code)?

a) To encrypt data b) To verify data integrity and authenticity c) To generate digital signatures d) To establish secure communication channels

13. Which cryptographic solution is used to securely store passwords?

a) Symmetric encryption b) Asymmetric encryption c) Hashing with salt d) Digital signatures

14. What is the purpose of a nonce in cryptographic protocols?

a) To encrypt data b) To ensure a unique value for each operation c) To generate digital signatures d) To establish secure communication channels

15. Which cryptographic solution is used to protect data at rest?

a) SSL/TLS b) Hashing c) Symmetric encryption d) Digital signatures

16. What is the primary purpose of a digital certificate in PKI?

a) To encrypt data b) To bind a public key to an entity c) To generate hash values d) To establish secure communication channels

17. Which cryptographic algorithm is used for secure email communication?

a) AES b) RSA c) SHA-256 d) HMAC

18. What is the purpose of a salt in password hashing?

a) To encrypt passwords b) To add randomness and prevent rainbow table attacks c) To generate digital signatures d) To establish secure communication channels

19. Which cryptographic solution is used to ensure non-repudiation?

a) Symmetric encryption b) Digital signatures c) Hashing d) HMAC

20. What is the primary purpose of a key exchange protocol like Diffie-Hellman?

a) To encrypt data b) To securely share a secret key over an insecure channel c) To generate hash values d) To create digital signatures

Cyber Security Essentials MCQs

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