SYSTEM SECURITY (SS) MAY 2012 COMPUTER SCIENCE SEMESTER 7

SYSTEM SECURITY (SS) MAY 2012 COMPUTER SCIENCE SEMESTER 7 

4511-12                                        (REVISED COURSE)                          GN-8492

                                                               (3 Hours)                               [Total Marks :-100]

N.B: (1) Question No.1 is compulsory.
        (2) Attempt any four questions from out of six questions remaining.
        (3) Assume data if required and state it clearly. 

Q.1 (a) What are eight security mechanism to implement security? [5 Marks]
       (b) Distinguish between attack, vulnerabilities and access control. [5 Marks]
       (c) What is Feistel Cipher? [5 Marks]
       (d) What is CAPTCHA? [5 Marks]

Q.2 (a) What is race condition? Describe an example of a race conditions. [10 Marks]
       (b) What is distinction between a polymorphic and a metamorphic worm? [5 Marks]
       (c) What is a double transposition cipher? Describe it with example. [5 Marks]

Q.3 (a) What are block cipher algorithm modes? Describe any two modes. [10 Marks]
       (b) What are firewall design principles? [10 Marks]

Q.4 (a) What is the principle behind One-Two-Pads (OTP)? Why they are highly
             secure? [10 Marks]
       (b) What is biometric authentication? What are two parameters defined for biometric
             measurement? [10 Marks] 

Q.5 (a) Describe the different vulnerabilities in enterprise network with real examples. [10 Marks]
       (b) What is Digital Rights Management (DRM) ? Describe DRM for P2P application. [10 Marks]

Q.6 (a) What are strengths and limitations Instruction Detection System? [10 Marks]
       (b) Using the RSA algorithm, encrypt the following : - [10 Marks]
             i. p=3, q=11, e=7, M=12
            ii. p=7, q=11,e=17,M=25
           iii. Find the corresponding ds for (i) and  (ii) and decrypt the ciphertexts.

Q.7 Solve the following  : -(any four) [20 Marks]
       a) AES
       b) SSL/TLS
       c) Honeypots
       d) MD5