A Security-enhanced Key Distribution Scheme for AODVjr Routing Protocol in ZigBee Networks

ZigBee network is a kind of flexible wireless network technology for control and monitoring applications and new techniques of security measures are essential for high-survivability network. Based on the effectiveness of AODVjr (Ad hoc on-demand distance vector junior) routing protocol in ZigBee networks, in this paper, we proposed a new security-enhanced key distribution scheme for AODVjr routing protocol in ZigBee networks. The key distribution was scheme implemented by combining the parameter exchange of Diffie-Hellman algorithm into the handshake protocol for node's joining a ZigBee network. Especially, the major improvement of Diffie-Hellman algorithm is to mix the parameters of key exchange with XOR operation so as to defend against typical man-in-the-middle attacks. Meanwhile, we analyzed the effect of XOR operation on key parameters by deducing the related theorems. Through the security analysis, the key distribution scheme demonstrates stronger security. We can verify that the AODVjr routing protocol with security enhancement has larger flexible application in ZigBee networks.