Cryptography & Network Security PYQ 2025-26 AKTU (BCS072)

AKTU · BTECH · Semester 7 · Cryptography & Network Security · Session 2025-26 · PYQ

AKTU Cryptography & Network Security (BCS072) previous year question paper 2025-26 for B.Tech Semester 7. Covers Security Foundations, Classical Encryption…

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Cryptography & Network Security AKTU syllabus

  1. Unit 1: Security Foundations, Classical Encryption and Modern Block Ciphers
  2. Unit 2: Mathematical Foundations, AES and Public Key Cryptography
  3. Unit 3: Message Authentication, Hash Functions and Digital Signatures
  4. Unit 4: Key Distribution, Authentication Applications and Email Security
  5. Unit 5: IP Security, Secure Transactions and System Security

Questions in Cryptography & Network Security AKTU PYQ 2025-26

  1. Q1a. Compare steganography and Cryptography. (2 marks, 2025-26)
  2. Q1b. State Chinese remainder theorem. (2 marks, 2025-26)
  3. Q1c. Calculate Φ(35). (2 marks, 2025-26)
  4. Q1d. Explain requirement of Hashing. (2 marks, 2025-26)
  5. Q1e. List the function of dual signature. (2 marks, 2025-26)
  6. Q1f. Write role of TGS. (2 marks, 2025-26)
  7. Q1g. Write requirement of padding in ESP. (2 marks, 2025-26)
  8. Q2a. Discuss Shannon’s theory of confusion and diffusion. Explain. (7 marks, 2025-26)
  9. Q2b. Write algorithm for primality test. How it works. (7 marks, 2025-26)
  10. Q2c. State and proof digital signature standard (DSS). (7 marks, 2025-26)
  11. Q2d. Compare Kerberos 4 and Kerberos 5. (7 marks, 2025-26)
  12. Q2e. Explain IP security. Explain its architecture. (7 marks, 2025-26)
  13. Q3a. Compare and contrast Output Feedback (OFB) and Counter mode of Block cipher. (7 marks, 2025-26)
  14. Q3b. List and explain security mechanisms. (7 marks, 2025-26)
  15. Q4a. State and prove Euler’s theorem. (7 marks, 2025-26)
  16. Q4b. Explain the structure single round of AES. (7 marks, 2025-26)
  17. Q5a. Explain Hash Function? Discuss SHA- 512 with all required steps, round function & block diagram. (7 marks, 2025-26)
  18. Q5b. Discuss the Message Authentication Codes. Also give the use of Authentication requirements in MAC. (7 marks, 2025-26)
  19. Q6a. Explain Diffie-Hellman key exchange algorithm with example. (7 marks, 2025-26)
  20. Q6b. Explain X.509 certificate. (7 marks, 2025-26)
  21. Q7a. Explain the following: (i) Intrusion detection. (ii) Firewall. (7 marks, 2025-26)
  22. Q7b. Explain the sequence of steps used in Secure Socket Layer Handshake Protocol for establishing a new session. Draw a diagram which shows the action of Handshake Protocol. (7 marks, 2025-26)

AKTU paper codes: BCS072

Cryptography & Network Security previous year papers

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