Localization-based Secret Key Agreement for Wireless Network
Qiang Wu · OhioLink ETD Center (Ohio Library and Information Network) · 2015
Due to the shared nature of wireless medium, generating secret key between legitimate nodes under the presence of eavesdroppers remains challenging in wireless network environment.In this research, a framework of secret key agreement utilizing observations of nodes' relative location is considered.While many current works concern secret key generation only for 3-nodes (2 legitimate nodes and 1 eavesdropper), this research proposes an approach and analysis for a wireless network environment with m (m≥3) legitimate nodes and 1 eavesdropper.The proposed algorithm uses the distance between a randomly selected node 1 and node 2 as the Reference Distance (RD) to establish the secret key.In order to secure the delivery of RD to other m-2 nodes, an Additive Distance Value (ADV) is used for public discussion.Further, different types of topologies are developed to accomplish secret key agreement for m node wireless network including star, chain and hybrid topologies.After the ADV distribution and RD estimation, the secret key is generated through secret bit extraction.The Maximum achievable Secret key generation Rate (MSR) based on the above network topologies is studied through theoretical analysis and mathematical estimation.Based on these analyze, the feasibility of proposed secret key xi