Other Bachelor Degree- CRYPTOGRAPHY AND NETWORK SECURITY(Karunya University, Coimbatore-2012)

Reg. No. ________                                                                                                                                                      

Karunya University

(Karunya Institute of Technology and Sciences)

(Declared as Deemed to be University under Sec.3 of the UGC Act, 1956)

 

Supplementary Examination – June 2012

 

Subject Title: CRYPTOGRAPHY AND NETWORK SECURITY                          Time: 3 hours

Subject Code:            09IT202                                                                                                                             Maximum Marks: 100           

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               

Answer ALL questions

PART – A (10 x 1 = 10 MARKS)

 

1.         Define Security Service.

2.         What is meant by Block Cipher?

3.         Define Plain Text.

4.         What are the three broad categories of applications of Public Key cryptosystems?

5.         Which block size and key size are used in the whirlpool Block Cipher?

6.         List out any two design objectives of HMAC.

7.         What are the fields in the Authentication Header?

8.         Why does Encapsulating Security Payload include a padding field?

9.         What is the main service of secure socket layer?

10.       What is meant by a Secure Electronic Transaction?

 

PART – B (5 x 3 = 15 MARKS)

 

11.       List and explain in different types of Security Attacks.

12.       Write short note on elliptic Curve cryptography.

13.       What is meant by Kerberos?

14.       What are the five principal services provided by PGP?

15.       What are the different four techniques used to avoid guessable passwords?

 

PART – C (5 x 15 = 75 MARKS)

 

16.       Explain in detail about the Data Encryption Standard.

(OR)

17.       Discuss in detail about the AES cipher.

 

18.       Explain in detail about the RSA algorithm.

(OR)

19.       Briefly explain about the Diffie-Hellman Key Exchange.

 

20.       Explain in detail about the Secure Hash Algorithm.

(OR)

21.       Discuss in detail about the Digital Signature Standard.

 

22.       Explain in detail about the S/MIME.

(OR)

23.       Explain in detail about the IP Security Architecture.

 

24.       Discuss in detail about the Distributed Intrusion Detection.

(OR)

25.       Briefly explain in detail about the Firewall Design.

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