Download SGBAU BCA 2019 Summer 5th Sem Network Security Question Paper

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B.C.A. Part—III (Semester—V) Examination

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NETWORK SECURITY

Paper—58T2

Time : Three Hours] [Maximum Marks : 60

Note :— (1) ALL questions are compulsory.

(2) All questions carry equal marks.

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1. (a) What are the essential ingredients of Symmetric Cipher ? Explain with diagram. 6
   (b) Explain Model for Network Security in brief. 6
   OR
2. (a) Explain the module for Network Security. 6
   (b) Explain the Symmetric Cipher Model. 6

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3. (a) Explain Cipher Block Chaining. 6
   (b) Describe the concept of Block Cipher and Stream Cipher. 6
   OR
4. (a) Explain the parameters and design choices that determine the actual algorithm of Feistal Cipher. 6
   (b) Discuss the operation of Data Encryption Standard (DES). 6

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5. (a) Discuss Modular Arithmetic Operation. 6
   (b) State and prove Euler’s Theorem. 6
   OR
6. (a) Describe the divisibility and division algorithm. 6
   (b) Explain the following terms :—
   

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   (1) Group
   (2) Ring
   (3) Field. 6
7. (a) Explain RSA Public Key Encryption Algorithm. 6
   (b) What are the principal elements of Public-key Crypto System ? 6
   

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   OR
8. (a) Explain Public Key Cryptography with suitable diagram. 6
   (b) Write importance of Digital Signature. 6
9. (a) Give examples of application of IP Security. 3
   (b) What are Firewalls ? Explain. 3
   

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   (c) What are MIME and S/MIME ? Explain. 6
   OR
10. (a) Explain Transport Layer Security. 6
    (b) Explain pretty good Privacy in e-mail security. 6

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