Information flow vs. resource access in the asynchronous pi-calculus

Hennessy, Matthew, Riely, James and Unset (2002) Information flow vs. resource access in the asynchronous pi-calculus. ACM Transactions on Programming Languages and Systems, 24 (5). pp. 566-591. ISSN 0164-0925

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We propose an extension of the asynchronous π-calculus in which a variety of security properties may be captured using types. These are an extension of the input/output types for the π-calculus in which I/O capabilities are assigned specific security levels. The main innovation is a uniform typing system that, by varying slightly the allowed set of types, captures different notions of security.We first define a typing system that ensures that processes running at security level σ cannot access resources with a security level higher than σ. The notion of access control guaranteed by this system is formalized in terms of a Type Safety Theorem.We then show that, by restricting the allowed types, our system prohibits implicit information flow from high-level to low-level processes. We prove that low-level behavior can not be influenced by changes to high-level behavior. This is formalized as a noninterference theorem with respect to may testing

Item Type: Article
Schools and Departments: School of Engineering and Informatics > Informatics
Depositing User: Matthew Hennessy
Date Deposited: 06 Feb 2012 19:16
Last Modified: 28 Nov 2012 10:58
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