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Improved Secure ZigBee Light Link Touchlink Commissioning Protocol Design

As the number of IoT(Internet of Things) systems grows rapidly, an increasing number of smart lighting devices appear in the market with ZLL(Zigbee Light Link) as communication technology. Security risks of ZLL also spring up at the same time. This paper focus on the security defects of ZLL touchlink commissioning protocol, which is released by Zigbee Alliance. In order to improve its' security, we design an improved ZLL toucklink commissioning protocol consisting of identity authentication based on hash chain. In the end, some performance evaluation is given. Compared with the original protocol, the improved one promotes the safety performance overall. Contrasted with other asymmetric algorithms, the computation speed is at least 1000 times faster.