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Cryptography MCQs and Answers With Explanation –Cryptography, the science of secure communication in the presence of third parties, has been a vital component of information security for centuries. With the widespread use of technology and the internet, cryptography has become an even more critical aspect of protecting sensitive information. If you want to test your knowledge of cryptography and learn more about this important field, check out the following sections containing the Top 60 Cryptography Multiple Choice Questions, along with detailed explanations for each question.
Cryptography MCQs
The following set of Cryptography MCQ questions will test your knowledge of various concepts related to encryption and decryption, allowing you to assess and improve your understanding of this critical field. Take this Cryptography Online Quiz to identify areas where you may need to improve your knowledge so that you can perform better in interviews or other assessments related to cryptography.
Cryptography Multiple Choice Questions and Answers
| Name | Cryptography |
| Exam Type | MCQ (Multiple Choice Questions) |
| Category | Technical Quiz |
| Mode of Quiz | Online |
Top 60 Cryptography Multiple Choice Questions
1. Which of the following is not a type of encryption?
A) Symmetric encryption
B) Asymmetric encryption
C) Hashing
D) Compression
Answer: D) Compression
Explanation: Compression is not a type of encryption, it is a technique used to reduce the size of data.
2. Which encryption algorithm is used in SSL/TLS?
A) DES
B) RSA
C) Blowfish
D) Triple-DES
Answer: B) RSA
Explanation: RSA (Rivest-Shamir-Adleman) is a widely used asymmetric encryption algorithm, and it is used for key exchange in SSL/TLS.
3. Which type of encryption uses the same key for both encryption and decryption?
A) Symmetric encryption
B) Asymmetric encryption
C) Hashing
D) None of the above
Answer: A) Symmetric encryption
Explanation: Symmetric encryption uses the same key for both encryption and decryption.
4. Which of the following is an example of a hash function?
A) SHA-1
B) RSA
C) AES
D) Diffie-Hellman
Answer: A) SHA-1
Explanation: SHA-1 (Secure Hash Algorithm 1) is an example of a hash function, it is used to produce a fixed-size output from a variable-size input.
5. Which encryption algorithm is considered to be the strongest?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is considered to be the strongest encryption algorithm.
6. Which of the following is not a characteristic of a good encryption algorithm?
A) Confidentiality
B) Integrity
C) Availability
D) Authentication
Answer: C) Availability
Explanation: Availability is not a characteristic of a good encryption algorithm, it is a characteristic of a good system.
7. Which of the following is a symmetric encryption algorithm?
A) RSA
B) AES
C) Diffie-Hellman
D) ECC
Answer: B) AES
Explanation: AES (Advanced Encryption Standard) is a symmetric encryption algorithm.
8. Which encryption algorithm is commonly used in PGP (Pretty Good Privacy)?
A) RSA
B) AES
C) Blowfish
D) Triple-DES
Answer: A) RSA
Explanation: RSA (Rivest-Shamir-Adleman) is commonly used in PGP (Pretty Good Privacy).
9. Which of the following is not a type of attack on encryption?
A) Brute force attack
B) Dictionary attack
C) Collision attack
D) Compression attack
Answer: D) Compression attack
Explanation: Compression attack is not a type of attack on encryption.
10. Which of the following is not a key length for AES?
A) 128-bit
B) 256-bit
C) 512-bit
D) 192-bit
Answer: C) 512-bit
Explanation: The key length for AES can be 128-bit, 192-bit, or 256-bit.
11. Which encryption algorithm is used in PGP (Pretty Good Privacy) for symmetric encryption?
A) DES
B) RSA
C) Blowfish
D) IDEA
Answer: D) IDEA
Explanation: IDEA (International Data Encryption Algorithm) is used in PGP (Pretty Good Privacy) for symmetric encryption.
12. Which of the following is a type of attack on encryption that tries every possible key combination?
A) Brute force attack
B) Dictionary attack
C) Collision attack
D) Rainbow table attack
Answer: A) Brute force attack
Explanation: A brute force attack tries every possible key combination.
13. Which encryption algorithm is used in SSH (Secure Shell)?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in SSH (Secure Shell).
14. Which of the following is a type of asymmetric encryption algorithm?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: B) RSA
Explanation: RSA (Rivest-Shamir-Adleman) is a type of asymmetric encryption algorithm.
15. Which encryption algorithm is used in WPA2 (Wi-Fi Protected Access 2)?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in WPA2 (Wi-Fi Protected Access 2).
16. Which of the following is not a type of cipher?
A) Substitution cipher
B) Transposition cipher
C) Vigenere cipher
D) RSA cipher
Answer: D) RSA cipher
Explanation: RSA is an encryption algorithm, not a type of cipher.
17. Which encryption algorithm is used in IPsec (Internet Protocol Security)?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in IPsec (Internet Protocol Security).
18. Which of the following is not a characteristic of a good key?
A) Length
B) Complexity
C) Reusability
D) Randomness
Answer: C) Reusability
Explanation: Reusability is not a characteristic of a good key.
19. Which encryption algorithm is used in SSL 3.0?
A) DES
B) RSA
C) Blowfish
D) RC4
Answer: D) RC4
Explanation: RC4 (Rivest Cipher 4) is used in SSL 3.0.
20. Which of the following is not a type of hash function attack?
A) Preimage attack
B) Birthday attack
C) Collision attack
D) Rainbow table attack
Answer: D) Rainbow table attack
Explanation: Rainbow table attack is not a type of hash function attack.
21. Which encryption algorithm is used in OpenVPN?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in OpenVPN.
22. Which of the following is a type of transposition cipher?
A) Caesar cipher
B) Playfair cipher
C) Rail fence cipher
D) Vigenere cipher
Answer: C) Rail fence cipher
Explanation: Rail fence cipher is a type of transposition cipher.
23. Which encryption algorithm is used in Kerberos?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: A) DES
Explanation: DES (Data Encryption Standard) is used in Kerberos.
24. Which of the following is not a characteristic of a good hash function?
A) Collision resistance
B) One-wayness
C) Reversibility
D) Determinism
Answer: C) Reversibility
Explanation: Hash functions are one-way functions, they cannot be reversed.
25. Which encryption algorithm is used in TLS 1.2?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in TLS 1.2.
26. Which of the following is a type of substitution cipher?
A) Caesar cipher
B) Playfair cipher
C) Rail fence cipher
D) Vigenere cipher
Answer : A) Caesar cipher
Explanation: Caesar cipher is a type of substitution cipher.
27. Which encryption algorithm is used in PGP (Pretty Good Privacy)?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: B) RSA
Explanation: RSA (Rivest-Shamir-Adleman) is used in PGP (Pretty Good Privacy).
28. Which of the following is not a type of symmetric encryption algorithm?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: B) RSA
Explanation: RSA is a type of asymmetric encryption algorithm.
29. Which encryption algorithm is used in S/MIME (Secure/Multipurpose Internet Mail Extensions)?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: B) RSA
Explanation: RSA (Rivest-Shamir-Adleman) is used in S/MIME (Secure/Multipurpose Internet Mail Extensions).
30. Which of the following is a type of stream cipher?
A) Playfair cipher
B) Vernam cipher
C) Rail fence cipher
D) Vigenere cipher
Answer: B) Vernam cipher
Explanation: Vernam cipher is a type of stream cipher.
31. Which encryption algorithm is used in GPG (GNU Privacy Guard)?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in GPG (GNU Privacy Guard).
32. Which of the following is a type of block cipher?
A) Playfair cipher
B) Vernam cipher
C) Rail fence cipher
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is a type of block cipher.
33. Which encryption algorithm is used in HTTPS (Hypertext Transfer Protocol Secure)?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in HTTPS (Hypertext Transfer Protocol Secure).
34. Which of the following is a type of hash function?
A) Caesar hash
B) MD5 hash
C) Rail fence hash
D) Vernam hash
Answer: B) MD5 hash
Explanation: MD5 (Message Digest 5) is a type of hash function.
35. Which encryption algorithm is used in SSL 2.0?
A) DES
B) RSA
C) Blowfish
D) RC4
Answer: D) RC4
Explanation: RC4 (Rivest Cipher 4) is used in SSL 2.0.
36. Which of the following is not a type of encryption attack?
A) Brute force attack
B) Dictionary attack
C) Social engineering attack
D) Rainbow table attack
Answer: C) Social engineering attack
Explanation: Social engineering attack is not a type of encryption attack.
37. Which encryption algorithm is used in Disk Encryption?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in Disk Encryption.
38. Which of the following is not a type of digital signature algorithm?
A) RSA
B) DSA
C) ECDSA
D) Blowfish
Answer: D) Blowfish
Explanation: Blowfish is an encryption algorithm, not a digital signature algorithm.
39. Which encryption algorithm is used in SSH File Transfer Protocol (SFTP)?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in SSH File Transfer Protocol (SFTP).
40. Which of the following is not a type of key exchange algorithm?
A) RSA
B) Diffie-Hellman
C) Elliptic Curve Diffie-Hellman (ECDH)
D) Blowfish
Answer: D) Blowfish
Explanation: Blowfish is an encryption algorithm, not a key exchange algorithm.
41. Which of the following is not a type of encryption mode?
A) ECB
B) CBC
C) OFB
D) RSA
Answer: D) RSA
Explanation: RSA is an encryption algorithm, not an encryption mode.
42. Which of the following is a type of message authentication code?
A) DES
B) HMAC
C) Blowfish
D) RSA
Answer: B) HMAC
Explanation: HMAC (Hash-based Message Authentication Code) is a type of message authentication code.
43. Which of the following is not a type of digital certificate?
A) SSL certificate
B) Code signing certificate
C) Personal certificate
D) Rail fence certificate
Answer: D) Rail fence certificate
Explanation: Rail fence is not a type of digital certificate.
44. Which encryption algorithm is used in 3DES (Triple Data Encryption Standard)?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: A) DES
Explanation: DES (Data Encryption Standard) is used in 3DES (Triple Data Encryption Standard).
45. Which of the following is not a type of public key infrastructure (PKI) component?
A) Certificate authority (CA)
B) Registration authority (RA)
C) Certificate revocation list (CRL)
D) Brute force attack tool
Answer: D) Brute force attack tool
Explanation: Brute force attack tool is not a PKI component.
46. Which of the following is a type of key agreement protocol?
A) RSA
B) Diffie-Hellman
C) ECDSA
D) Blowfish
Answer: B) Diffie-Hellman
Explanation: Diffie-Hellman is a type of key agreement protocol.
47. Which of the following is not a type of attack on cryptography?
A) Brute force attack
B) Side-channel attack
C) Man-in-the-middle attack
D) Protocol attack
Answer: D) Protocol attack
Explanation: Protocol attack is not a type of attack on cryptography.
48. Which encryption algorithm is used in OpenPGP?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in OpenPGP.
49. Which of the following is a type of digital signature algorithm?
A) DSA
B) RSA
C) ECDSA
D) All of the above
Answer: D) All of the above
Explanation: DSA (Digital Signature Algorithm), RSA (Rivest-Shamir-Adleman), and ECDSA (Elliptic Curve Digital Signature Algorithm) are all types of digital signature algorithm.
50. Which of the following is not a type of digital signature?
A) Message authentication code (MAC)
B) Public key digital signature
C) Hash-based digital signature
D) Elliptic Curve digital signature
Answer: A) Message authentication code (MAC)
Explanation: MAC (Message authentication code) is not a type of digital signature.
51. Which of the following is not a type of cryptographic hash function?
A) SHA-1
B) SHA-2
C) MD5
D) RSA
Answer: D) RSA
Explanation: RSA is not a type of cryptographic hash function.
52. Which of the following is not a type of public key infrastructure (PKI) service?
A) Certificate authority (CA)
B) Registration authority (RA)
C) Certificate revocation list (CRL)
D) Diffie-Hellman service
Answer: D) Diffie-Hellman service
Explanation: Diffie-Hellman is a key agreement protocol, not a PKI service.
53. Which encryption algorithm is used in the WPA2 wireless security protocol?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in the WPA2 wireless security protocol.
54. Which of the following is a symmetric key algorithm?
A) RSA
B) Diffie-Hellman
C) AES
D) Elliptic Curve Cryptography (ECC)
Answer: C) AES
Explanation: AES (Advanced Encryption Standard) is a symmetric key algorithm.
55. Which encryption algorithm is used in the IPsec protocol?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in the IPsec protocol.
56. Which of the following is a type of attack on public key infrastructure (PKI)?
A) Birthday attack
B) Replay attack
C) Padding oracle attack
D) All of the above
Answer: D) All of the above
Explanation: Birthday attack, replay attack, and padding oracle attack are all types of attacks on PKI.
57. Which encryption algorithm is used in the PPTP protocol?
A) DES
B) RSA
C) Blowfish
D) RC4
Answer: A) DES
Explanation: DES (Data Encryption Standard) is used in the PPTP protocol.
58. Which of the following is not a type of key agreement protocol?
A) Diffie-Hellman
B) ECDH
C) RSA
D) MQV
Answer: C) RSA
Explanation: RSA is not a key agreement protocol.
59. Which encryption algorithm is used in the S/MIME secure email standard?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in the S/MIME secure email standard.
60. Which encryption algorithm is used in the TLS 1.2 protocol?
A) DES
B) RSA
C) Blowfish
D) AES
Answer: D) AES
Explanation: AES (Advanced Encryption Standard) is used in the TLS 1.2 protocol.
The Cryptography MCQs provide an excellent opportunity for you to assess and enhance your understanding of encryption and decryption. By taking this Cryptography Online Quiz, you will be gaining valuable knowledge and skills that will be useful in various contexts related to information security. Don’t forget to bookmark our Freshersnow website to stay up-to-date on various technical quizzes and other important topics.