Protection rings - PowerPoint PPT Presentation

CIT 380: Securing Computer Systems

CIT 380: Securing Computer Systems. Access Control. Access Control Matrix. As system changes, state changes. State transitions. Only concerned with protection state. ACM must be enforced by a mechanism that limits state transitions to those that go from one element of Q to another.

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System Calls &amp; Libraries

System Calls &amp; Libraries. Vivek Pai Lecture 4, COS318 Sep 25, 2001. Gedankundmathematics. Recall the pointer verification case for fread( ) Can you speed up the checking process? What’s the best you could achieve? O(n)? O(logn)? O(1)? What happens if you have &gt;32 bits?

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822 views • 34 slides

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Protection rings - PowerPoint PPT Presentation

CIT 380: Securing Computer Systems

System Calls &amp;amp; Libraries

System Calls & Libraries