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

By Shiu-Kai Chin

"Developed from the authors' classes at Syracuse collage and the U.S. Air strength study Laboratory, entry keep watch over, defense, and belief: A Logical strategy equips readers with an entry keep watch over good judgment they could use to specify and make certain their safeguard designs. during the textual content, the authors use a unmarried entry keep an eye on good judgment in keeping with an easy propositional modal logic.

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

Taking a logical, rigorous method of entry keep an eye on, this publication indicates how common sense is an invaluable software for interpreting defense designs and spelling out the stipulations upon which entry keep watch over judgements rely. it truly is designed for machine engineers and laptop scientists who're liable for designing, imposing, and verifying safe machine and data systems."--Pub. desc.  Read more...

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Although the logic can be used to inform an implementation, it is not a programming language, and we are not suggesting that access controllers be implemented as theorem provers. , certificates and credentials) against existing policies and trust assumptions; these checklists correspond to provably sound inference rules in the logic. Two chapters (Chapter 2 and Chapter 3) are devoted to formally defining the syntax and semantics of the logic. The logic is straightforward and typical of the kinds of modal and temporal logics used by industry for hardware verification and model checking.

2 The Modus Ponens Rule Another common rule is Modus Ponens: Modus Ponens ϕ ϕ⊃ϕ ϕ This rule states that, if both the implication ϕ1 ⊃ ϕ2 and the formula ϕ1 have been previously introduced, then we can also introduce the formula ϕ2 . For example, if we have previously derived the two formulas (Bill says sell) ⊃ buy and Bill says sell, then we can use the Modus Ponens rule to also derive buy. 3 The Says Rule The Says rule is defined as follows: Says ϕ P says ϕ Informally, this rule states that any principal can make any statement (or safely be assumed to have made any statement) that has already been derived.

34 Access Control, Security, and Trust: A Logical Approach The following exercises provide opportunities to use the Kripke semantics to calculate the meanings of access-control formulas, to identify structures that satisfy given formulas, and to prove useful properties about the semantics. 2 Suppose M is the Kripke structure W, I, J , where W , I, and J are defined as follows: W = {w0 , w1 , w2 } I(s) = {w1 , w2 } I(t) = {w2 } J(Cy) = {(w1 , w0 ), (w1 , w1 ), (w2 , w0 )} J(Di) = {(w0 , w1 ), (w1 , w0 ), (w2 , w2 )}.

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