Abstract
Several notions of non-interference have been proposed in the literature to study the problem of confidentiality in concurrent systems. The common feature of these non-interference properties is that they are all defined as extensional properties based on some notion of behavioural equivalence on systems. Here we also address the problem of defining non-interference by looking at the structure of the net systems under investigation. We define structural non-interference properties based on the absence of particular places in the net. We characterize a structural property, called PBNI+, that is equivalent to the well-known behavioural property SBNDC. We start providing a characterization of PBNI+ on contact-free Elementary Net Systems, then we extend the definition to cope with the richer class of Trace nets.
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Busi, N., Gorrieri, R. (2004). Positive Non-interference in Elementary and Trace Nets. In: Cortadella, J., Reisig, W. (eds) Applications and Theory of Petri Nets 2004. ICATPN 2004. Lecture Notes in Computer Science, vol 3099. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-27793-4_1
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DOI: https://doi.org/10.1007/978-3-540-27793-4_1
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