Cryptography & Network Security PYQ 2025-26 AKTU (BCIT701)

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

AKTU Cryptography & Network Security (BCIT701) 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. Define cryptography and state any two security services. (2 marks, 2025-26)
  2. Q1b. What is the difference between stream cipher and block cipher? (2 marks, 2025-26)
  3. Q1c. State Fermat’s Little Theorem. (2 marks, 2025-26)
  4. Q1d. What is the purpose of a digital signature? (2 marks, 2025-26)
  5. Q1e. What is Diffie–Hellman key exchange used for? (2 marks, 2025-26)
  6. Q1f. Define Public Key Infrastructure (PKI (2 marks, 2025-26)
  7. Q1g. Mention any two functions of a firewall. (2 marks, 2025-26)
  8. Q2a. Explain substitution and transposition ciphers with suitable examples. (7 marks, 2025-26)
  9. Q2b. Explain modular arithmetic and Extended Euclidean Algorithm with example. (7 marks, 2025-26)
  10. Q2c. Explain authentication requirements and hash functions. Discuss birthday attack. (7 marks, 2025-26)
  11. Q2d. Explain symmetric key distribution methods and Diffie–Hellman key exchange. (7 marks, 2025-26)
  12. Q2e. Explain IP Security architecture and its components. (7 marks, 2025-26)
  13. Q3a. Describe the Feistel structure and explain the working of DES. (7 marks, 2025-26)
  14. Q3b. Discuss block cipher modes of operation and explain Triple DES. (7 marks, 2025-26)
  15. Q4a. Describe the AES encryption and decryption process. (7 marks, 2025-26)
  16. Q4b. Explain RSA algorithm along with its security considerations. (7 marks, 2025-26)
  17. Q5a. Describe Secure Hash Algorithm (SHA) and its security features. (7 marks, 2025-26)
  18. Q5b. Explain ElGamal Digital Signature technique and Digital Signature Standard (DSS). (7 marks, 2025-26)
  19. Q6a. Describe X.509 certificates and Public Key Infrastructure (PKI). (7 marks, 2025-26)
  20. Q6b. Explain Kerberos authentication protocol and electronic mail security using PGP. (7 marks, 2025-26)
  21. Q7a. Describe SSL and Secure Electronic Transaction (SET). (7 marks, 2025-26)
  22. Q7b. Discuss intrusion detection systems, viruses, and the role of firewalls in network security. (7 marks, 2025-26)

AKTU paper codes: BCS072

Cryptography & Network Security previous year papers

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