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Computational secrecy by typing for the pi-calculus. (English) Zbl 1168.68433
Kobayashi, Naoki (ed.), Programming languages and systems. 4th Asian symposium, APLAS 2006, Sydney, Australia, November 8–10, 2006. Proceedings. Berlin: Springer (ISBN 978-3-540-48937-5/pbk). Lecture Notes in Computer Science 4279, 253-269 (2006).
Summary: We define and study a distributed cryptographic implementation for an asynchronous pi calculus. At the source level, we adapt simple type systems designed for establishing formal secrecy properties. We show that those secrecy properties have counterparts in the implementation, not formally but at the level of bitstrings, and with respect to probabilistic polynomial-time active adversaries. We rely on compilation to a typed intermediate language with a fixed scheduling strategy. While we exploit interesting, previous theorems for that intermediate language, our result appears to be the first computational soundness theorem for a standard process calculus with mobile channels.
For the entire collection see [Zbl 1133.68007].

MSC:
68Q85 Models and methods for concurrent and distributed computing (process algebras, bisimulation, transition nets, etc.)
94A60 Cryptography
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