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The protection of information in computer systems
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BibTeX
@MISC{Saltzer_theprotection,
author = {Jerome H. Saltzer and Michael D. Schroeder},
title = {The protection of information in computer systems},
year = {}
}
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Abstract
This tutorial paper explores the mechanics of protecting computer-stored information from unauthorized use or modification. It concentrates on those architectural structures--whether hardware or software--that are necessary to support information protection. The paper develops in three main sections. Section I describes desired functions, design principles, and examples of elementary protection and authentication mechanisms. Any reader familiar with computers should find the first section to be reasonably accessible. Section II requires some familiarity with descriptor-based computer architecture. It examines in depth the principles of modern protection architectures and the relation between capability systems and access control list systems, and ends with a brief analysis of protected subsystems and protected objects. The reader who is dismayed by either the prerequisites or the level of detail in the second section may wish to skip to Section III, which reviews the state of the art and current research projects and provides suggestions for further reading. Glossary The following glossary provides, for reference, brief definitions for several terms as used in this paper in the context of protecting information in computers. Access The ability to make use of information stored in a computer system. Used frequently as a verb, to the horror of grammarians. Access control list A list of principals that are authorized to have access to some object. Authenticate To verify the identity of a person (or other agent external to the protection system) making a request.
Keyphrases
access control list list brief analysis protection system design principle section iii desired function protected object several term computer system modern protection architecture tutorial paper section ii access control list system information protection computer-stored information current research project first section unauthorized use brief definition descriptor-based computer architecture elementary protection capability system protected subsystem main section second section authentication mechanism architectural structure
