April 2000
SC223 : COMPUTER SECURITY

QUESTION 5

Total Marks: 15 Marks

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SUGGESTED SOLUTIONS
for Question 5

(a) Your senior management hold the view that network security is a waste of time and money, and is merely a distraction from the main aim of your organization. How would you go about persuading them otherwise? [4 marks]

(b) What is the purpose of sensitivity assessment in network risk analysis, and what information is needed for this process? [3 marks]

(c) One aspect of the economic assessment phase of network risk analysis is computing residual risk.

(i) What is residual risk? [1 mark]

(ii) What information is needed to compute the residual risk? [2 marks]

(iii) Complete the following table for computing residual risk. (Don’t forget to include row and column headings.)

?

?

High

Moderate

Low

High

     

Moderate

     

Low

     

[2 marks]

(d) Identify three benefits of including security design activities in the system design process. [3 marks]