Security and Trust Management: 8th International Workshop, by Peter Drábik, Fabio Martinelli, Charles Morisset (auth.),

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By Peter Drábik, Fabio Martinelli, Charles Morisset (auth.), Audun Jøsang, Pierangela Samarati, Marinella Petrocchi (eds.)

This e-book constitutes the completely refereed post-conference complaints of the eighth overseas Workshop on safeguard and belief administration, STM 2012, held in Pisa, Italy, in September 2012 - together with the seventeenth eu Symposium learn in desktop defense (ESORICS 2012). The 20 revised complete papers have been rigorously reviewed and chosen from fifty seven submissions. The papers are prepared into topical sections on coverage enforcement and tracking; entry keep watch over; belief, attractiveness, and privateness; dispensed platforms and actual safeguard; authentication and safeguard policies.

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Extra info for Security and Trust Management: 8th International Workshop, STM 2012, Pisa, Italy, September 13-14, 2012, Revised Selected Papers

Example text

1 and 2) with respect to the same monitor, and shows that they capture the intuition that a monitor that enforces a policy without being tailored for a specific target can enforce the policy on any target, while the inverse does not hold in general. , independently of a specific monitor. Surprisingly, in such a comparison the two definitions turn out to be equivalent. Theorem 1. ∀P∀T : ∃M : P is specifically soundly enforceable on T by M ⇔ ∃M : P is generally soundly enforceable by M . The right-to-left direction of the theorem is straightforward: any generalized monitor can be used as a target-specific monitor.

T. ∀i ≥ 1. (qi−1 , σi , qi ) ∈ δ. pdf Lazy Security Controllers Fig. 2. The FSM of a target 39 Fig. 3. The FSM recognizing bad prefixes for the LTL property ϕ = G¬(b ∧ Xb) we can associate an infinite word W(π ) ∈ Σ ω to such a path. The set of all infinite paths from q is denoted P athsω (q). When a FSM is interpreted as an automaton on finite words its semantics is a language L ⊆ Σ ∗ . Given a FSM A, we denote its language on finite words as L(A), where x ∈ L(A) iff there is path from the initial state ι to any final state.

Choice (1) can be expressed in our model by appropriately restricting the renaming function applied to the target. For example, in Fig. , OpenFile, CloseFile, and WriteFile). This models monitors that mediate inputs sent to the target and can prevent, for example, SQL injections attacks. Similarly, renaming only the outputs of the target models monitors that mediate only output actions (and can prevent, for example, cross-site scripting attacks). Choice (2) is closely related to representing previous models of monitors in our framework; please see our technical report for more detail on this and on modeling different trace-modification capabilities [20].

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