Read e-book online Access Control, Security, and Trust : A Logical Approach PDF

By Shiu-Kai Chin

ISBN-10: 1439894639

ISBN-13: 9781439894637

ISBN-10: 1584888636

ISBN-13: 9781584888635

Developed from the authors’ classes at Syracuse college and the U.S. Air strength study Laboratory, Access keep an eye on, safeguard, and belief: A Logical Approach equips readers with an entry keep watch over common sense they could use to specify and ensure their safety designs. in the course of the textual content, the authors use a unmarried entry regulate good judgment in accordance with an easy propositional modal logic.

The first a part of the ebook offers the syntax and semantics of entry regulate good judgment, uncomplicated entry regulate recommendations, and an advent to confidentiality and integrity regulations. the second one part covers entry keep watch over 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 regulate, this publication indicates how good judgment is an invaluable instrument for examining protection designs and spelling out the stipulations upon which entry keep an eye on judgements rely. it's designed for laptop engineers and machine scientists who're liable for designing, imposing, and verifying safe desktop and knowledge systems.

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Extra resources for Access Control, Security, and Trust : A Logical Approach

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A specific 128-bit encryption key is associated with Carol). In subsequent chapters, we will express and reason about a variety of accesscontrol concepts using this logic. The purpose of this chapter and the next is to provide a primer to the logic itself. ”). We introduce the first two of these components in this chapter, leaving the inference rules for Chapter 3. However, we begin by reviewing important concepts and notation from discrete mathematics that we will use throughout this book, including sets, relations, and certain operations on them.

2. Consider an arbitrary element a ∈ {x | R(x) ⊆ Y } ∩ {x | T (x) ⊆ Y }. It follows that R(a) ⊆ Y and T (a) ⊆ Y , and hence R(a) ∪ T (a) ⊆ Y . Because R(a) ∪ T (a) = (R ∪ T )(a), we also have that (R ∪ T )(a) ⊆ Y , and thus a ∈ {x | (R ∪ T )(x) ⊆ Y }. Because a was an arbitrary element of {x | R(x) ⊆ Y } ∩ {x | T (x) ⊆ Y }, we have shown that {x | R(x) ⊆ Y } ∩ {x | T (x) ⊆ Y } ⊆ {x | (R ∪ T )(x) ⊆ Y }. Having demonstrated that each set is a subset of the other, we have shown that {x | (R ∪ T )(x) ⊆ Y } = {x | R(x) ⊆ Y } ∩ {x | T (x) ⊆ Y }.

Thus, if we wish to associate all of P’s statements to Q, then we need to know that J(Q)(w) ⊆ J(P)(w) for 32 Access Control, Security, and Trust: A Logical Approach all worlds w. If J(Q) ⊆ J(P), then this relationship naturally holds. Therefore, we define W, if J(Q) ⊆ J(P) EM [[P ⇒ Q]] = / 0, otherwise. The following examples illustrate these semantic definitions. 7. 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}.

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Access Control, Security, and Trust : A Logical Approach by Shiu-Kai Chin

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