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Group Secret Key Generation Algorithm from Wireless Signal Strength

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3 Author(s)
Yunchuan Wei ; R&D Center, China Acad. of Launch Vehicle Technol., Beijing, China ; Changmin Zhu ; Jun Ni

In order to generate a group secret key in the multiuser network, we propose an algorithm through all users' collaboration and using the wireless signal strength. Three specific investigations are conducted hereby. First, we explore a pair-wise shared secret key in two-user communication by the Received Signal Strength (RSS) including Cascade reconciliation and the Merkle-Damgard hash function. Second, we generate a group secret key and distribute the key to all users. Third, we analyze the network size in the mobile and static scenarios. Through our experiments, we validate security of the algorithm of shared keys. The advantage of the proposed method lies in the legitimate channel over eavesdropping channel. Under different situations such as different velocities or sites (indoor and outdoor), we obtain the relationship of Group Key Generation Rate (GKGR) and the probing rate. We also estimate the Key Agreement Ratio (KAR) to demonstrate the method's applicability.

Published in:

2012 Sixth International Conference on Internet Computing for Science and Engineering

Date of Conference:

21-23 April 2012