the most critical components of any operation system

Question
One of the most critical components of any operation system is the access control function. Conduct independent research using the books for the class, web sites, etc. and write a summary of operating system access control. In particular, focus on the underlying theory and underpinnings of access control theory. Elements your paper should contain include the following:

Trust model

Threat model

Access matrix

Various types of access control(MAC, DAC, etc.)

You are not required to discuss Windows, Linux, or any other operating system but are free to include elements of those systems in this paper. However, please do not provide an overview of access control in those systems as the basis of your paper, I am focused on the theory and not specific application.

The paper should be about 2-3 pages minimum and certainly more is acceptable. Please use 12 point font and double space.

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