Abstract
This paper proposes a new biometric-based key distribution scheme, BodySec, for energyefficient secure communications in wireless body sensor networks. To the best of our knowledge, BodySec is the first approach that can remove the timing synchronization assumption of the biometric inter-pulse signals among different biomedical sensors. The basic design is to represent the biometrics as an unordered set of short-term slots, then transform the problem of key agreement using biometrics into a problem of set reconciliation, finally ensure the different sensors can possess the same keys with low energy consumption. The experimental results on the PhysioBank electrocardiogram database demonstrate that BodySec opens up a new feasible way for energy-efficient key distribution in the future human-centered wireless system characterized by timing asynchronism and limited power.
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