Cryptography & Network Security PYQ 2021-22 AKTU (KCS074)

AKTU · BTECH · Semester 7 · Cryptography & Network Security · Session 2021-22 · PYQ

AKTU Cryptography & Network Security (KCS074) previous year question paper 2021-22 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 2021-22

  1. Q1a. What are the requirements of Encrypted Tunnels? (2 marks, 2021-22)
  2. Q1b. Why compression is done before encryption in PGP? (2 marks, 2021-22)
  3. Q1c. Find the value of φ(12). (2 marks, 2021-22)
  4. Q1d. Compute 3⁶¹ mod 7. (2 marks, 2021-22)
  5. Q1e. Find gcd (1970, 1066) (2 marks, 2021-22)
  6. Q1f. Explain Transport Layer Security? (2 marks, 2021-22)
  7. Q1g. Explain IPSec ESP Format. (2 marks, 2021-22)
  8. Q1h. What are the requirements of a good hash function? (2 marks, 2021-22)
  9. Q1i. Differentiate between Substitution & Transposition Cipher? (2 marks, 2021-22)
  10. Q1j. What do you mean by cryptanalysis? (2 marks, 2021-22)
  11. Q2a. In a public key system using RSA, you intercept the cipher text C=8 sent to a user whose public key is e=13, n=33. What is the plain text M? (10 marks, 2021-22)
  12. Q2b. Differentiate between monoalphabetic ciphers and polyalphabetic ciphers and give one example for each. (10 marks, 2021-22)
  13. Q2c. Explain Chinese Remainder Theorem (CRT) and find X for the given set of congruent equations using Chinese Remainder theorem: X=1 mod 5; X=2 mod 7; X=3 mod 9; X=4 mod 11. (10 marks, 2021-22)
  14. Q2d. Give the encryption/decryption procedures using Elliptic Curve Cryptography. (10 marks, 2021-22)
  15. Q2e. Define Euler’s Totient Function. Prove that, φ(pq) = (p-1)(q-1), where p and q are prime numbers. (10 marks, 2021-22)
  16. Q3a. What is the most security-critical component of DES round function? Give a brief description of this function. (10 marks, 2021-22)
  17. Q3b. Write the pseudo code for Miller Rabin primality testing. Test whether 61 is prime or not using the same Miller Rabin test (10 marks, 2021-22)
  18. Q4a. Illustrate the working of SHA-1 algorithm with diagram (10 marks, 2021-22)
  19. Q4b. Discuss the Message Authentication Codes. Also give the use of Authentication requirements in MAC. (10 marks, 2021-22)
  20. Q5a. 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. (10 marks, 2021-22)
  21. Q5b. Discuss the stream cipher RC4 in detail. (10 marks, 2021-22)
  22. Q6a. Explain the sequence of steps involved in the message generation and reception in Pretty Good Privacy (PGP) with block diagrams. (10 marks, 2021-22)
  23. Q6b. Discuss the design of S-Box of AES. How it differs from the S-Boxes of DES. (10 marks, 2021-22)
  24. Q7a. Write the Digital Signature Algorithm (DSA) of Digital Signature Standard. What is the implication if same K (secret per message) is used to sign two different message using DSA? (10 marks, 2021-22)
  25. Q7b. Define a Group and Ring. Prove that the order of any subgroup of finite group divides the order of the group (10 marks, 2021-22)

AKTU paper codes: BCS072

Cryptography & Network Security previous year papers

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