Opacity Generalised to Transition Systems

Recently, opacity has proved to be a promising technique for describing security properties. Much of the work has been couched in terms of Petri nets. Here, we extend the notion of opacity to the model of labelled transition systems and generalise opacity in order to better represent concepts from the work on information flow. In particular, we establish links between opacity and the information flow concepts of anonymity and non-interference such as non-inference. We also investigate ways of verifying opacity when working with Petri nets. Our work is illustrated by an example modelling requirements upon a simple voting system.

• Type: Conference
• Year: 2005
• Where: IFIP
• Authors: Jeremy Bryans, Maciej Koutny, Laurent Mazaré, Peter Y. A. Ryan
• Keywords: Better Represent Concepts, Communications, IFIP 2005, Information flow, Petri Nets