A Novel Physical-layer Security Scheme for Internet of Things

Addressing the security of Internet of Things from the physical layer is a promising study. This paper proposes a security strategy for authentication and conversation key generation between IoT devices at the physical layer. The physical layer parameters are constructed according to the received signal strengths of different frequencies. With the help of packet interleaving, smoothing and normalization, the double threshold quantized data are used for the key agreement and location-based authentication. We deploy the IoT nodes to evaluate the performance of the proposed method and demonstrate the feasibility of implementation in low cost and static environments.