{"appState":{"pageLoadApiCallsStatus":true},"articleState":{"article":{"headers":{"creationTime":"2016-09-12T18:43:36+00:00","modifiedTime":"2016-09-12T18:43:36+00:00","timestamp":"2022-09-14T18:16:01+00:00"},"data":{"breadcrumbs":[{"name":"Academics & The Arts","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33662"},"slug":"academics-the-arts","categoryId":33662},{"name":"Study Skills & Test Prep","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33772"},"slug":"study-skills-test-prep","categoryId":33772},{"name":"CISSP","_links":{"self":"https://dummies-api.dummies.com/v2/categories/33777"},"slug":"cissp","categoryId":33777}],"title":"What Is a Trusted Computing Base?","strippedTitle":"what is a trusted computing base?","slug":"trusted-computing-base","canonicalUrl":"","seo":{"metaDescription":"A Trusted Computing Base (TCB) is the entire complement of protection mechanisms within a computer system (including hardware, firmware, and software) that's re","noIndex":0,"noFollow":0},"content":"A <em>Trusted Computing Base</em> (TCB) is the entire complement of protection mechanisms within a computer system (including hardware, firmware, and software) that's responsible for enforcing a security policy. A <em>security perimeter</em> is the boundary that separates the TCB from the rest of the system.\r\n\r\n<em>Access control</em> is the ability to permit or deny the use of an <em>object</em> (a passive entity, such as a system or file) by a <em>subject</em> (an active entity, such as an individual or a process).\r\n\r\nA <em>reference monitor</em> is a system component that enforces access controls on an object. Stated another way, a reference monitor is an abstract machine that mediates all access to an object by a subject.\r\n<p class=\"article-tips tech\">A security kernel is the combination of hardware, firmware, and software elements in a Trusted Computing Base that implements the reference monitor concept. Three requirements of a security kernel are that it must</p>\r\n\r\n<ul>\r\n\t<li>Mediate all access</li>\r\n\t<li>Be protected from modification</li>\r\n\t<li>Be verified as correct</li>\r\n</ul>","description":"A <em>Trusted Computing Base</em> (TCB) is the entire complement of protection mechanisms within a computer system (including hardware, firmware, and software) that's responsible for enforcing a security policy. A <em>security perimeter</em> is the boundary that separates the TCB from the rest of the system.\r\n\r\n<em>Access control</em> is the ability to permit or deny the use of an <em>object</em> (a passive entity, such as a system or file) by a <em>subject</em> (an active entity, such as an individual or a process).\r\n\r\nA <em>reference monitor</em> is a system component that enforces access controls on an object. Stated another way, a reference monitor is an abstract machine that mediates all access to an object by a subject.\r\n<p class=\"article-tips tech\">A security kernel is the combination of hardware, firmware, and software elements in a Trusted Computing Base that implements the reference monitor concept. Three requirements of a security kernel are that it must</p>\r\n\r\n<ul>\r\n\t<li>Mediate all access</li>\r\n\t<li>Be protected from modification</li>\r\n\t<li>Be verified as correct</li>\r\n</ul>","blurb":"","authors":[{"authorId":9931,"name":"Lawrence C. Miller","slug":"lawrence-c-miller","description":" <p><b>Lawrence C. Miller, CISSP,</b> is a veteran information security professional. He has served as a consultant for multinational corporations and holds many networking certifications.</p> <p><b>Peter H. Gregory, CISSP,</b> is a security, risk, and technology director with experience in SAAS, retail, telecommunications, non-profit, manufacturing, healthcare, and beyond. 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What Is a Trusted Computing Base?

By: Lawrence C. Miller and Peter H. Gregory and

Updated: 09-12-2016

Common Core Standards For Parents For Dummies

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A Trusted Computing Base (TCB) is the entire complement of protection mechanisms within a computer system (including hardware, firmware, and software) that's responsible for enforcing a security policy. A security perimeter is the boundary that separates the TCB from the rest of the system.

Access control is the ability to permit or deny the use of an object (a passive entity, such as a system or file) by a subject (an active entity, such as an individual or a process).

A reference monitor is a system component that enforces access controls on an object. Stated another way, a reference monitor is an abstract machine that mediates all access to an object by a subject.

A security kernel is the combination of hardware, firmware, and software elements in a Trusted Computing Base that implements the reference monitor concept. Three requirements of a security kernel are that it must

Mediate all access
Be protected from modification
Be verified as correct

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