| Summary: | In the community medical Internet of Things (IoT) environment, there exist a large number of device nodes, network nodes and user nodes which form a heterogeneous network. In order to ensure smooth data exchange, some gateway nodes are adopted to connect different network spaces. Therefore, how to identify and authenticate the identities of heterogeneous nodes is an urgent problem to be solved. In this paper, we start with node security identity authentication, make uses of the mechanism of elliptic curve encryption algorithm signature and session key symmetric encryption, design an efficient community medical IoT node secure two-way identity authentication method, and propose a secure and reliable update mechanism for the update of authentication keys and session keys. These measures can effectively ensure the legality of nodes and communication security in the community medical IoT system. Through the analysis and comparison of experimental performance, this scheme is more suitable for the scene of community medical Internet of Things.
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