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Context Authentication Using Constrained Channels

Kindberg, Tim; Zhang, Kan

HPL-2001-84

Keyword(s): context-aware computing; location-based computing; security; authentication

Abstract: This paper presents a paradigm shift from conventional authentication--of a principal's identity--to authentication of parameters that characterise a principal's context. Location, in particular, is a highly significant contextual parameter. It is one that features in what are known as mobile, ubiquitous, pervasive and nomadic computing systems. We present a model of context authentication based on the characteristics of communication channels. As an example, we present protocols for location authentication that are based on physical channel characteristics. We conclude with a summary and discussion of the work.

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