Biju Patnaik University of Technology 2008-1st Sem B.Tech 8th nternet Security and Professional Ethics - Question Paper

Eighth Semester Examination - 2008 INTERNET SECURITY AND PROFESSIONAL ETHICS Full Marks - 70 Time : 3 Hours

Answer Question No. 1 which is compulsory and any five from the rest.

The figures in the right-hand margin indicate marks.

Total number of printed pages - 4

4.    (a) Explain the structure of DES and list few of

its weakness.    5

(b) The encryption key in a transposition cipher is (3, 2, 6, 1, 5, 4). Find the decryption key.    5

5.    (a) Explain the key expansion in AES-128. 5

(b) List security requirements in a database.

5

6.    (a) Explain any one of the digital signature

scheme.    5

(b) Compare and contrast key management in PGP and S/MIME.    5

7.    (a) Descri be how master secret is created from

pre-master secret in SSL.    5

(b) Define security policy and explain its purpose with relation to IPSec.    5

8. (a) What is single sign on (SSO) and why is it required ?    5

(b) How digital signature and encryption can be used in virtual elections ?    5

CPEE 5301    5    P.T.O.    CPEE 5301    6    Contd.

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