T215B - Communication and Information Technologies - IT Assignment Help

Assignment Task

Question 1:
During your study of T215B, you have been introduced to a set of concepts, protocols and threats to network security. Using your own words, write a summary about network security explaining the following factors:
a. Explain the basic idea about IPsec protocol, its aim and disadvantages.
b. Do a comparison between Caesar cipher using diagraph coding and Vigenère Cipher in terms of their operation and level of security.
c. Explain the Message Digest Algorithm 5 (MD5) and describe briefly its operation.

Note:
In answering the above question, you should adhere to the following:
• You should refer to reliable resources (books, papers, conferences, and AOU e-library). Include at least two references.
• Use cross-referencing and citation.
• All the references must be cited in proper format.

Question 2:
A biometric system consists of two subsystems: face and fingerprint. The following values have been obtained for the two subsystems separately:

FMR (False Match Rate) FNMR (False Non-Match Rate)
Face subsystem 8% 10 %
Fingerprint subsystem 4% 14%
Suppose that the subsystems decisions are combined as follows:
The outcome of the combined system will be a match only when the outcomes of both of the subsystems are matches. When the outcome of either subsystem is a non-match, the outcome of the combined system will be a non-match.
a. Compute the FMR and FNMR values of the combined system?
b. What are your conclusions about the performance of the combined system?

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