Cryptography & Network Security PYQ 2020-21 AKTU (RIT701)

AKTU · BTECH · Semester 7 · Cryptography & Network Security · Session 2020-21 · PYQ

AKTU Cryptography & Network Security (RIT701) previous year question paper 2020-21 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 2020-21

  1. Q1a. What do you mean Brute Force Attack? (2 marks, 2020-21)
  2. Q1b. Define CIA? (2 marks, 2020-21)
  3. Q1c. Define the concept of confusion and Diffusion? (2 marks, 2020-21)
  4. Q1d. Find all the primitive roots of 11. (2 marks, 2020-21)
  5. Q1e. Find gcd (24140, 16762) using Euclid’s algorithm? (2 marks, 2020-21)
  6. Q1f. List out the services provided by the Digital Signature. (2 marks, 2020-21)
  7. Q1g. What are the five principal services provided by PGP? (2 marks, 2020-21)
  8. Q2a. Explain the Security Attacks with Example (7 marks, 2020-21)
  9. Q2b. Explain the Structure of DES Algorithm and define the role of fiestal cipher in DES in detail. (7 marks, 2020-21)
  10. Q2c. Explain symmetric and Asymmetric Cryptography with the help of diagrammatic representation. And how-to symmetric cryptography is different from asymmetric Cryptography. (7 marks, 2020-21)
  11. Q2d. State Chinese remainder theorem and find X for the given set of congruent equations using CRT: X=2(mod3), X=3(mod5), X=2(mod7) (7 marks, 2020-21)
  12. Q2e. Describe RSA algorithm, Suppose alice and bob uses a public key cryptosystem using RSA, the two prime no is P=13 and q=17 and e=7 the find out the decryption key d and Perform the encryption and decryption of the message “CRYPTOGRAPHY” Using 00 to 25 for letters A to Z. (7 marks, 2020-21)
  13. Q3a. Explain Block modes of operation and also explain the Electronic Code Book (ECB) mode is not a secured mode of encryption and highlight the problems with this mode. (7 marks, 2020-21)
  14. Q3b. Give a real-life example where both confidentiality and integrity are needed. Explain why encryption alone does not provide integrity of information. (7 marks, 2020-21)
  15. Q4a. Compare Substitution and Transposition techniques. (7 marks, 2020-21)
  16. Q4b. Encrypt the following using play fair cipher using the keyword: MONARCHY. “SWARAJ IS MY BIRTH RIGHT”. Use X as blank space. (7 marks, 2020-21)
  17. Q5a. Define Primality Test and also explain Miller Rabin Algorithm using base 2 to test whether the number 341 is composite or not? (7 marks, 2020-21)
  18. Q5b. Explain AES algorithm. What is the difference between the AES decryption algorithm and the DES algorithm. (7 marks, 2020-21)
  19. Q6a. Explain the Kerberos protocol for key distribution? Explain the functionality of each step. (7 marks, 2020-21)
  20. Q6b. How does worms and viruses compare? Describe the components of the virus and how does it protect from anti-virus software’s? (7 marks, 2020-21)
  21. Q7a. What do you mean by SHA1 algorithm What basic arithmetical and logical functions are used in SHA? (7 marks, 2020-21)
  22. Q7b. Explain in detail about S/MIME and what is difference between S/MIME and PGP. (7 marks, 2020-21)

AKTU paper codes: BCS072

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