Improving secret key generation performance for on-body devices

Authors:
Linjia Yao;Syed Taha Ali;Vijay Sivaraman;Diethelm Ostry
Affiliations:
University of New South Wales, Sydney, Australia;University of New South Wales, Sydney, Australia;University of New South Wales, Sydney, Australia;ICT Centre, CSIRO, Sydney, Australia
Venue:
Proceedings of the 6th International Conference on Body Area Networks
Year:
2011

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Abstract

In this paper, we undertake experiments to assess the feasibility of generating common secret keys between two bodyworn devices using the near-body channel. Deriving secret keys using the wireless channel is a practical and lightweight alternative to public-key key-agreement approaches. Our results indicate that key generation is good for dynamic scenarios where communicating devices are placed in non-line-of-sight positions on the body. Furthermore, we enhance existing key generation mechanisms by proposing a filtering method to reduce bit mismatch.