Cryptography & Network Security Unit 4 – Key Distribution, Authentication Applications and Email Security: important questions for AKTU
Unit 4 (Key Distribution, Authentication Applications and Email Security) questions that AKTU repeats most often. This unit carries about 28 marks per paper. Start with the repeated questions, then the most asked topics.
Most repeated Unit 4 questions
- Determine the role of X.509 certificate in cryptography. Discuss X.509 certificate in detail. (10 marks, 2025, X.509 Certificates) – also asked in 2019, 2024
- Discuss X.509 certificates in detail. Write the role of X.509 certificates in cryptography. (10 marks, 2024, X.509 Certificates) – also asked in 2019, 2025
- Explain the full-service Kerberos environment. Determine the principal differences between version 4 and version 5 of Kerberos. (10 marks, 2025, Kerberos) – also asked in 2023
Most important Unit 4 topic
- Kerberos (Unit 4: Key Distribution, Authentication Applications and Email Security) – asked 10 times in 2018, 2020, 2021, 2023, 2024, 2025, 2026
Most asked Unit 4 topics
- Kerberos – asked 10 times
- X.509 Certificates – asked 8 times
- Pretty Good Privacy (PGP) – asked 8 times
More Unit 4 previous year questions
- What is Diffie–Hellman key exchange used for? (2 marks, 2026, Diffie-Hellman Key Exchange)
- Write role of TGS. (2 marks, 2026, Kerberos)
- Define Public Key Infrastructure (PKI (2 marks, 2026, Public Key Infrastructure)
- Compare Kerberos 4 and Kerberos 5. (7 marks, 2026, Kerberos)
- Explain symmetric key distribution methods and Diffie–Hellman key exchange. (7 marks, 2026, Symmetric Key Distribution)
Unit 4 syllabus topics
- Symmetric Key Distribution
- Diffie-Hellman Key Exchange
- Public Key Distribution
- X.509 Certificates
- Public Key Infrastructure
- Kerberos
- Pretty Good Privacy (PGP)
- S/MIME