BSc IT Sem 5 Network Security Question Paper PDF 2026 - Mumbai University | munotes

Questions asked in this paper

1. Q1 Attempt of the following: 10 marks
   • a. What is the need of security? Discuss different security models
   • b. Write a note on Phishing
   • c. Discuss the types of attacks from technical point of view
   • d. Alice and Bob want to establish a secret key using the Diffie-Hellman Key Exchange protocol. Assuming the values as n=11, g=5, x=2 and y=3. Find out the values of A, B and the secret key (K1 or K2)
2. Q2 Attempt of the following: 10 marks
   • a. Write note on Cipher Feedback (CFB) mode
   • b. Differentiate between stream ciphers and block ciphers
   • c. Discuss how encryption happens in
   • d. Explain the working of Blowfish algorithm
3. Q3 Attempt of the following: 10 marks
   • a. Describe the advantages and disadvantages of symmetric and asymmetric key
   • b. What is key wrapping? How is it useful?
   • c. Discuss the problems with exchanging of public keys?
   • d. Write on ElGamal digital signature
4. Q4 Attempt of the following: 10 marks
   • a. What is the purpose behind Certification Authority Hierarchy? Explain Describe how cross certification is useful
   • c. Explain different types of digital certificates
   • d. What are the role of Certification Authority and Registration Authority?
5. Q5 Attempt of the following: Explain the SSL (Secure Socket Layer) handshake protocol Differentiate between Secure Socket Layer (SSL) and Secure Electronic Transaction Write note on Electronic money 10 marks
   • d. How GSM (Global System for Mobile) security does works?
6. Q6 Attempt of the following: 10 marks
   • a. What are the problems associated with clear text passwords? How can it be
   • b. | How does Kerberos work?
   • c. What is reflection attack? How can it be prevented?
   • d. What is SSO (Signal Sign On)? Explain in brief
7. Q7 Attempt any three of the following: 15 marks
   • a. Discuss the Principles of Security
   • b. the principles of the IDEA algorithm
   • c. Discuss the history of asymmetric key cryptography in brief
   • d. Explain the concept of Digital Certificate
   • e. Explain Time Stamping Protocol
   • f. Write a note on Biometric authentication

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