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 examine Laboratory, Access keep watch over, safeguard, and belief: A Logical Approach equips readers with an entry regulate good judgment they could use to specify and ensure their protection designs. through 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 publication offers the syntax and semantics of entry keep watch over good judgment, easy entry keep watch over techniques, and an advent to confidentiality and integrity guidelines. the second one part covers entry keep watch over in networks, delegation, protocols, and using cryptography. within the 3rd part, the authors specialise 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 booklet exhibits how good judgment is an invaluable software for reading defense designs and spelling out the stipulations upon which entry keep watch over judgements rely. it's designed for machine engineers and laptop scientists who're accountable for designing, imposing, and verifying safe computing device and data systems.

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Sample text

7 Prove that, for any Kripke structure M = W, I, J , principal P, and formulas ϕ1 and ϕ2 , the following relationship holds: EM [[P says (ϕ1 ≡ ϕ2 )]] ∩ EM [[P says ϕ1 ]] ⊆ EM [[P says ϕ2 ]]. 8 Prove that, for every Kripke structure M = W, I, J , principal P, and formulas ϕ1 and ϕ2 , the following relationship holds: M |= P says (ϕ1 ≡ ϕ2 ) ⊃ (P says ϕ1 ⊃ P says ϕ2 ). 7 is helpful here. 9 Prove that, for any Kripke structure M = W, I, J and formulas ϕ1 and ϕ2 , EM [[ϕ1 ≡ ϕ2 ]] = W if and only if EM [[ϕ1 ]] = EM [[ϕ2 ]].

Thus, for example, the formula p ⊃ q ∧ r is an abbreviation of (p ⊃ (q ∧ r)). Likewise, the formulas ((¬q ∧ r) ⊃ s) and (Jill says (r ⊃ (p ∨ q))) can be abbreviated respectively as follows: ¬q ∧ r ⊃ s, Jill says (r ⊃ p ∨ q). When the same binary operator appears multiple times in a formula—for example, p ⊃ q ⊃ r—the parentheses associate from left to right: (p ⊃ q) ⊃ r. The operators says and controls bind even more tightly than ∧, and thus have as small a scope as 22 Access Control, Security, and Trust: A Logical Approach possible.

If EM [[ϕ1 ]] = EM [[ϕ2 ]], then EM [[ϕ1 ≡ ϕ2 ]] = W . 4 Summary Providing and maintaining security—in both the physical and digital worlds— requires us to be able to determine whether or not any given decision to grant access to resources or services is correct. Unfortunately, natural language expressions have imprecise meanings. We need a way to unambiguously express the policies, trust assumptions, recognized authorities, and statements made by various principals and be able to justify the resulting access-control decisions.

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

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