By Michael K. Reiter (auth.), Joachim Biskup, Javier López (eds.)

This e-book constitutes the refereed complaints of the twelfth ecu Symposium on examine in machine safety, ESORICS 2007, held in Dresden, Germany in September 2007.

The 39 revised complete papers offered have been rigorously reviewed and chosen from 164 submissions. ESORICS is proven because the eu learn occasion in desktop safeguard; it offers unique examine contributions, case experiences and implementation reports addressing any point of desktop protection - in concept, mechanisms, purposes, or useful experience.

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Additional resources for Computer Security – ESORICS 2007: 12th European Symposium On Research In Computer Security, Dresden, Germany, September 24 — 26, 2007. Proceedings

Example text

All the resources in our example are owned by our academic department, and so to access a resource (resource) one must prove that the department has authorized the access (Dept says open(resource)). Alice is the manager in charge of a machine room with three entrances: door1, door2, and door3. , KDept signed delegate(Dept, Alice, door1). Alice’s responsibilities include deciding who else may access the machine room. machine-room)). Suppose that Charlie, who currently does not have access to the machine room, wishes to open one of the machine-room doors.

1. 2). In Section 5, we discuss the use of our techniques in the context of additional logics, systems and applications. Proofs of our theorems, and discussion of related work elided due to space constraints, can be found in our accompanying technical report [5]. 2 Goals and Contributions As discussed in Section 1, we will describe new techniques for generating proofs in an authorization logic that an access request is consistent with access-control policy. It will be far easier to discuss our approach in the context of a concrete authorization logic, and for this purpose we utilize the same sample logic as we used in previous work [4], which is reproduced in Figure 2.

Example construction of LR tactics from an inference rule The insight behind the left tactic is that instead of looking for complete proofs of the delegation premise in the set of facts in the knowledge base, it looks for proofs among the paths precomputed by PC, thus following an arbitrarily long delegation chain in one step. The premise exercising the delegation is then proved normally, by recursively applying tactics to find any remaining choice subgoals. Conversely, the right tactic assumes that the delegation premise can be proved only with the use of a choice subgoal, and restricts the search to only those proofs.

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Computer Security – ESORICS 2007: 12th European Symposium On by Michael K. Reiter (auth.), Joachim Biskup, Javier López
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