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Engineering B.E. (Computer Engineering) Sem 7 Cryptography and System Security Dec 2018 Question Paper - Mumbai University | munotes

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Cryptography And System Security Question Paper, Dec 2018.pdf
CMPN · 420 KB · 1 May 2025

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Older exam None: this is the earliest we hold
Newer exam Dec 2019 Semester-end · Cryptography and System Security →

Questions asked in this paper

  1. Q1 Summaries and find Plain text by decrypting cipher text “KVWG” using Hill Cipher
  2. Q1 b) Consider a scenario where an intruder wants to access some valuable information from an ongoing communication. What security services should be implemented in system and which mechanism can to achieve those security services?
  3. Q2 a) Encrypt “ academic committee will meet today ” using Playfair Cipher with
    • Q. Discuss CBC and OFB Block cipher Modes
  4. Q3 a) If generator g=2 and n or using diffie Hellman solve the
    • i) Show that 2 is primitive root of 11
    • ii) IfA has public key 9, What is A’s Private Key
    • iii) IfB has public key 3, What is B’s Private Key
  5. Q3 b) Elaborate International Data Encryption Algorithm (IDEA) and its key generation? 10 marks
  6. Q4 a) Explain Digital Signature and Digital Certificate used for authentication 10 marks
  7. Q4 b) Calculate Cipher Text using RSA Algorithm for following data: Prime Numbers P=7, Q= 17. Plain Text Message M=10. Find pair of keys and Cipher text
  8. Q5 a) Explain Hash Based Message Authentication Code. Give Example also. 10 marks
  9. Q5 b) Describe various types of Intrusion Detection System (IDS). What are Active and Passive IDS? Paper Subject Code: 42102 Cryptography and System Security
  10. Q6 a) Convert given PT = with Key (1011001101) using S-DES Algorithm
  11. Q6 b) Explain concept of key management along with its distribution !

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