Model Question Paper - II

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3 Νοε 2013 (πριν από 4 χρόνια και 6 μέρες)

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Register No:…………………












Name :…………............


M.
M.TECH. DEGREE EXAMINATION

Model Question Paper
-

I
I

Second Semester

Branch: Information Technology

Specialization:
Network Engineering

MITNE 202

CRYPTOGRAPHY AND NETWORK
SECURITY

(Regular


2011 Admission onwards)

Time: Three hours



Maximum: 100 Marks


1. a.
Describe OSI security architecture.






(10 marks)


b.
What is polyalphabetic substitution?


(8 marks)


c.
Write short notes on traffic confidentiality





(7marks)





OR

2. a. Write short notes on transposition and substitution ciphers with examples.


(7 marks)


b. Explain AES cip
her.








(8 marks)


c.
Explain block cipher design principles







(10 marks)


3. a. What are Fiestel Networks? Describe how it is used in a DES algorithm.

(9 marks)


b. Explain Triple DES.








(7 marks)


c.
Briefly describe the security f
eatures for authentication, access control and remote
execution in windows 2000.







(9 marks)





OR

4. a.
Discuss the general protection mechanisms in operating system.


(8 marks)


b.
State the advantage of Diffie Hellman key exchange.




(10 mar
ks)


c.
Outline the cryptographic solutions available in JAVA.





(7 marks)


5. a. Explain Message Authentication Code.





(8 marks)


b. Explain MD5 message Digest algorithm.





(10 marks)


c. Outline the significance of digital signatures.





(7 marks)

P.T.O.


OR

6. a. Differentiate between HASH and MAC.





(7 marks)


b. Write short notes on RIPEMD.







(8 marks)


c. Explain Digital Signature Standard.






(10 marks)


7. a. Explain how security is achieved in GSM.





(9 marks)



b. Writes short notes on SHTTP.







(7 marks)


c.
Show that PGP provides both authentication and confidentiality in sending email
messages.









(9 marks)

OR

8. a.
Discuss the common intrusion techniques in a computing environment.

(10 marks)


b
. What is SSL? Outline its significance.






(8 marks)


c. Write short notes on Web security






(7 marks)