Title :
Secret Key Generation Rate vs. Reconciliation Cost Using Wireless Channel Characteristics in Body Area Networks
Author :
Ali, Syed Taha ; Sivaraman, Vijay ; Ostry, Diethelm
Author_Institution :
Sch. of Electr. Eng. & Telecommun., Univ. of New South Wales, Sydney, NSW, Australia
Abstract :
In this paper, we investigate the feasibility of real time derivation of cryptographic keys in body area networks using unique characteristics of the underlying wireless channel. We perform experiments to confirm that motion does indeed provide significant highly correlated randomness on either end of the wireless link between base station and mobile mote to enable real-time key generation. Furthermore, we demonstrate that channel characteristics for a dynamic body area network consist of two different components, a fast and a slow component, each of which make a qualitatively different contribution to key generation. These components can be isolated to address specific needs of the application scenario: the fast component can yield high entropy keys at a fast rate between base station and mobile mote with some bit disagreement between the two devices, the slow component generates keys at a lower rate but with very high level of bit agreement. Our experimental results highlight this tradeoff, and our key generation protocol details the key extraction process.
Keywords :
body area networks; private key cryptography; wireless channels; body area networks; cryptographic keys; reconciliation cost; secret key generation rate; wireless channel characteristics; body area networks; secret key generation; wireless sensor networks;
Conference_Titel :
Embedded and Ubiquitous Computing (EUC), 2010 IEEE/IFIP 8th International Conference on
Conference_Location :
Hong Kong
Print_ISBN :
978-1-4244-9719-5
Electronic_ISBN :
978-0-7695-4322-2
DOI :
10.1109/EUC.2010.103