ch14 - Chapter 14: Protection Chapter 14: Protection s...

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Chapter 14: Protection Chapter 14: Protection
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14.2 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts Chapter 14: Protection Chapter 14: Protection Goals of Protection Principles of Protection Domain of Protection Access Matrix Implementation of Access Matrix Access Control Revocation of Access Rights Capability-Based Systems Language-Based Protection
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14.3 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts Objectives Objectives Discuss the goals and principles of protection in a modern computer system Explain how protection domains combined with an access matrix are used to specify the resources a process may access Examine capability and language-based protection systems
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14.4 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts Goals of Protection Goals of Protection Operating system consists of a collection of objects, hardware or software Each object has a unique name and can be accessed through a well-defined set of operations. Protection problem - ensure that each object is accessed correctly and only by those processes that are allowed to do so.
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14.5 Silberschatz, Galvin and Gagne ©2005 Operating System Concepts Principles of Protection Principles of Protection Guiding principle – principle of least privilege Programs, users and systems should be given just enough privileges to perform their tasks
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Silberschatz, Galvin and Gagne ©2005 Operating System Concepts Domain Structure Domain Structure Access-right = < object-name , rights-set > where rights-set is a subset of all valid operations that can be performed on the object.
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This note was uploaded on 01/21/2012 for the course COMPUTER CSCI 593 taught by Professor Hamnes during the Spring '11 term at Aston University.

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ch14 - Chapter 14: Protection Chapter 14: Protection s...

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