Assignment 4-Part 1.docx - Assignment 4 Part 1 Concepts 1...

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Assignment 4 Part 1: Concepts 1. Why is it important to distinguish between mechanisms of protection and policies of protection? A policy is followed in everyday life and the same meaning applies in the context of protection for operating systems. It is something that is meant to be done and followed. A mechanism of protection takes the policy and demonstrates how the policy should be used. In operating systems, a policy must be selected and then the programmer would show how this policy needs to be implemented. There can be a lot of creativity on how to implement different policies for programs. To do so it is very important that variables are defined very well within a program. When a mechanism is altered it allows more efficiency to a program without changing the original policy. 2. What is an access matrix , and how can it be implemented? An access matrix is an abstract model with different subjects. For each one, the security characteristics cross-reference with it’s corresponding object. The rows represent the domains and the columns represent the objects. The implementation of an access matrix
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