Monday, January 23, 2023

Dr. A.P.J. Abdul Kalam University MTECH III SEM (CSE) Network Security & Cryptography [MTCSE302(1)] Dec 2020 Question Paper

Dr. A.P.J. Abdul Kalam University

Master of Technology

Third Semester Main Examination, Dec-2020

Network Security & Cryptography [MTCSE302(1)]

Time: 3:00 Hrs Max Marks 70

Note : Attempt any five questions out of seven.

All questions carry equal marks.

Q.1 What is the difference between poly alphabetic and mono alphabetic ciphers?

Q.2 How Key distribution is achieved in symmetric key cryptography? What is key management?

Q.3 Explain DES,3 DES and what are its strength?

Q.4 Explain that the Electronic Code Book (ECB) mode is not a secured mode of encryption and

highlight the problems with this mode.

Q.5 How does worms and viruses compare? Describe the components of the virus and how does it

protect from anti-virus software’s?

Q.6 What is the difference of an Intrusion Detection System (IDS) and firewall?

Q.7 Explain the working principle of Differential Power Attacks (DPA) and show how can be used to

attack cryptosystems. Explain with the help of an example of a block cipher.

Q.8 What basic arithmetical and logical functions are used in MD-5? Explain SHA-1.

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