Cryptography & Network Security PYQ 2023-24 AKTU (KCS074)

AKTU · BTECH · Semester 7 · Cryptography & Network Security · Session 2023-24 · PYQ

AKTU Cryptography & Network Security (KCS074) previous year question paper 2023-24 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 2023-24

  1. Q1a. Define steganography with example. (2 marks, 2023-24)
  2. Q1b. Explain cryptanalysis. (2 marks, 2023-24)
  3. Q1c. Compute GCD (24120,1640) using Euclid’s algorithm. (2 marks, 2023-24)
  4. Q1d. Find all primitive roots of 13. (2 marks, 2023-24)
  5. Q1e. Explain birthday attack. (2 marks, 2023-24)
  6. Q1f. Write the services provided by digital signature. (2 marks, 2023-24)
  7. Q1g. Define X.509 certificates. (2 marks, 2023-24)
  8. Q1h. List the any four services provided by Pretty good privacy. (2 marks, 2023-24)
  9. Q1i. Discuss intrusion detection. (2 marks, 2023-24)
  10. Q1j. Explain firewall and its usage. (2 marks, 2023-24)
  11. Q2a. Discuss the working of DES in detail with suitable diagram. (10 marks, 2023-24)
  12. Q2b. Explain RSA algorithm with suitable steps. Let p=17, q=11, e=7 and d=23. Calculate the public key & private key and show encryption and decryption for plain text M=77 by using RSA algorithm. (10 marks, 2023-24)
  13. Q2c. Explain Digital Signature. Discuss signing & verifying process of Digital Signature Algorithm (DSA) in detail with suitable steps. (10 marks, 2023-24)
  14. Q2d. Discuss Diffie-Hellman key exchange in detail with suitable diagram. (10 marks, 2023-24)
  15. Q2e. Explain secure electronic transaction (SET) protocol with suitable diagram. (10 marks, 2023-24)
  16. Q3a. Discuss cryptography and its types with suitable example. (10 marks, 2023-24)
  17. Q3b. Define block cipher. Also discuss any two block cipher modes of operation with advantages and disadvantages of each with block diagram. (10 marks, 2023-24)
  18. Q4a. State and prove Fermat’s theorem. Use Fermat theorem to find a number ‘a’ between0 and 72 with a≡9794 mod 73. (10 marks, 2023-24)
  19. Q4b. State Chinese remainder theorem (CRT). Solve the following congruent equations by CRT: (i) X=2 mod 3; (ii) X=3 mod 5. (10 marks, 2023-24)
  20. Q5a. Discuss message authentication code (MAC). Also give the use of authentication requirement in MAC. (10 marks, 2023-24)
  21. Q5b. Explain Hash Function. Discuss SHA- 512 with all required steps, round function with block diagram. (10 marks, 2023-24)
  22. Q6a. Explain Kerberos protocol for key distribution with suitable diagram. (10 marks, 2023-24)
  23. Q6b. Discuss X.509 certificates in detail. Write the role of X.509 certificates in cryptography. (10 marks, 2023-24)
  24. Q7a. Discuss authentication header and encapsulating security payload in detail with packet format. (10 marks, 2023-24)
  25. Q7b. Explain working of intrusion detection system (IDS) and its types with suitable diagram. (10 marks, 2023-24)

AKTU paper codes: BCS072

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