Contextual biometric-based authentication for ubiquitous services

Authors:
Ileana Buhan;Gabriele Lenzini;Saša Radomirović
Affiliations:
Philips Research, Eindhoven, The Netherlands;Interdisciplinary Centre for Security, Reliability and Trust, University of Luxembourg, Luxembourg, Luxembourg;Faculty of Science, Technology and Communication, University of Luxembourg, Luxembourg, Luxembourg
Venue:
UIC'10 Proceedings of the 7th international conference on Ubiquitous intelligence and computing
Year:
2010

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Abstract

We introduce and comment on the concept of contextual pseudo identity. A contextual pseudo identity is a soft identity token that is built from both a user's biometric and the context. When it comes to ubiquitous authentication, a contextual pseudo identity promises better security than that offered by traditional biometrics-based identity tokens: the use of context improves the tokens' disposability and renewability, which are two essential properties in the protection of a user's real identity. Our algorithm for generating contextual pseudo identities extends a Fuzzy Embedder so that it accepts both biometric and context-dependent input. We prove that our way of processing the context preserves the security and reliability properties of the Fuzzy Embedder used in our extension. An example shows how a user can utilize contextual pseudo identity to authenticate to and access ubiquitous services.