Access control, security, and trust : a logical approach - download pdf or read online

By Shiu-Kai Chin

ISBN-10: 1584888628

ISBN-13: 9781584888628

"Developed from the authors' classes at Syracuse college and the U.S. Air strength learn Laboratory, entry keep an eye on, protection, and belief: A Logical process equips readers with an entry keep an eye on good judgment they could use to specify and ascertain their safeguard designs. during the textual content, the authors use a unmarried entry keep an eye on common sense in line with an easy propositional modal logic.

The first a part of the ebook offers the syntax and semantics of entry regulate common sense, uncomplicated entry keep an eye on thoughts, and an advent to confidentiality and integrity guidelines. the second one part covers entry keep an eye on in networks, delegation, protocols, and using cryptography. within the 3rd part, the authors concentrate on and digital machines. the ultimate half discusses confidentiality, integrity, and role-based entry control.

Taking a logical, rigorous method of entry keep watch over, this ebook indicates how good judgment is an invaluable software for studying protection designs and spelling out the stipulations upon which entry keep watch over judgements rely. it really is designed for laptop engineers and desktop scientists who're answerable for designing, enforcing, and verifying safe desktop and data systems."--Pub. desc.  Read more...

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Extra info for Access control, security, and trust : a logical approach

Sample text

2, where we introduce formal proofs. For now, however, we discuss each of the logical rules in turn. 1 The Taut Rule The simplest rule is the axiom Taut: Taut ϕ if ϕ is an instance of a prop-logic tautology This axiom states that any instance of a tautology from propositional logic can be introduced at any time as a derivable statement in the access-control logic. To understand what this rule means, first recall that a propositional-logic tautology is a formula that evaluates to true under all possible interpretations of its propositional variables.

The set of worlds in W0 in which the formula Hal says g is true is given by EM0 [[Hal says g]], which is calculated as follows: EM0 [[Hal says g]] = {w | J0 (Hal)(w) ⊆ EM0 [[g]]} = {w | J0 (Hal)(w) ⊆ {sw}} = {sw, sc}. , when the current world is either sw or sc), the children will be able to go outside. In contrast, recall that Flo is unable to distinguish the two worlds sw and sc. Specifically, the relation J0 (Flo) has the following properties: J0 (Flo)(sw) = {sw, sc}, J0 (Flo)(sc) = {sw, sc}, J0 (Flo)(ns) = {ns}.

3 Semantics Although we provided an informal reading of the logical formulas in the previous section, we have not yet provided sufficient details to enable precise or rigorous use of the logic. In the next chapter, we introduce logical rules that we can use to reason about a variety of access-control situations. However, as with any logic, several important questions arise: What statements are true in this logic, and how do we know? What does a given statement really mean? How do we know that the inference rules are trustworthy?

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Access control, security, and trust : a logical approach by Shiu-Kai Chin


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