Download JNTUH MCA 4th Sem R17 2020 November 844AE Information Security Question Paper

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Code No: 844AE Rl 7

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

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MCA 1V Semester Examinations, October/ November - 2020

INFORMATION SECURITY

Time: 2 Hours Max.Marks:75

Answer any five questions

All questions carry equal marks

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1. a) List and explain the security services.
   b) Explain how Cipher Feedback mode can convert a block cipher to stream cipher. [7+8]
2. Explain how a plain text block is encrypted using Blowfish algorithm. [15]
3. a) Perform encryption and decryption using RSA algorithm of the following. p=17; q=11; e=7; M=88.
   b) With a neat diagram explain how to transfer a message confidentially and at the same time ensure integrity and authenticity. [7+8]

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4. Explain KerberosV4 authentication dialogue in detail.
5. What is the purpose of Digital certificates? Explain. [7+8]
   Explain the fields of PGP User Public keyRing?
6. Write down the applications of Authentication protocols. [7+8]
   List and describe the security services offered by S'MIME.

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7. What are the requirements of web security? [7+8]
   Describe how e-transactions are secured.
8. What is the purpose of SSL Change Cipher Specification protocol? [7+8]
   List and explain different types of intruders.
9. Explain any two approaches of intrusion detection. [7+8]

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