ch14 - Chapter 14: Protection Silberschatz, Galvin and...

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Silberschatz, Galvin and Gagne ©2009 Chapter 14: Protection
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14.2 Silberschatz, Galvin and Gagne ©2009 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 ©2009 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 ©2009 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 ©2009 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 ©2009 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. Domain = set of access-rights
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This note was uploaded on 07/13/2011 for the course COP 4610 taught by Professor Staff during the Summer '08 term at FAU.

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ch14 - Chapter 14: Protection Silberschatz, Galvin and...

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