Download JNTUH MCA 4th Sem R15 2020 November 824AE Information Security Question Paper

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Code No: 824AE Rl 5

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA 1V Semester Examinations, October/ November - 2020

INFORMATION SECURITY

Time: 2 Hours Max.Marks:75

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Answer any five questions

All questions carry equal marks

1. Define Caesar cipher? Calculate the encryption and decryption for the following plain text P= “COME TO MY HOME” by using ceaser cipher with Key k=3. [15]

2. a) Specify and contrast all kinds of cipher techniques in the cryptography. [7+8]

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   b) Mention the key principles of security.

3. a) Differentiate between AES and DES in a brief manner. [7+8]

   b) Explain how key is generated in the RSA algorithm.

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4. a) Differentiate block cipher and stream cipher techniques. [7+8]

   b) Explain key distribution of symmetric key.

5. a) Define authentication service. And explain x.509 authentication services in a detail. [7+8]

   b) Describe why Kerberos is more secure than the other security mechanisms?

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6. Describe the following terms in detail [7+8]

   a) Whirlpool b) knapsack algorithm.

7. a) Demonstrate combining security-associations. [7+8]

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   b) Discuss about the IP security architecture in detail.

8. a) Differentiate socket layer security and transport security. [7+8]

   b) Demonstrate techniques used to avoid guessable password.

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