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Assignment No. 02
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Semester: Fall 2019

Network Security-CS315 Total Marks: 20

Due Date: 28/11/2019

Instructions:

Please read the following instructions carefully before submitting assignment:

You need to use MS word document to prepare and submit the assignment on VU-LMS.

It should be clear that your assignment will not get any credit if:

The assignment is submitted after due date.

The assignment is not in the required format (doc or docx).

The submitted assignment does not open or file is corrupt.

Assignment is copied (partial or full) from any source (websites, forums, students, etc.).

Objective:

To enhance the knowledge about Cryptographic techniques involving symmetric and asymmetric algorithms.

Assignment

Question No.1: 10 Marks

Message authentication in “One-way Hash” function can be implemented with and without encryption. Considering the scenario where a message is authenticated without encryption between two stations, you are required to answer the following questions:

a) What will be component of the message sent from station A and received at station B?

b) What component of the message will ensure at receiving station that message is not corrupted?

Question No.2: 10 Marks

Cryptography is usually done by using Symmetric and Asymmetric encryption algorithms like Public-key encryption algorithms and Hash functions respectively. How would you differentiate Public-key encryption algorithms and Hash functions on the basis of following?

a) Mechanism of mathematical operations.

b) Number of keys being used for cryptography.

Best of Luck!