基于ZigBee的智能家居系统安全通信研究

目前基于无线技术的智能家居系统给人们带来了舒适和便利,但系统容易遭受攻击,有较多的隐私数据需要保护。针对无线通信中数据安全问题,设计了一种智能家居系统及其安全通信方法,即设计了系统的组网结构,规划了外网和内网。内网的家居设备节点采集信息并采用ZigBee通信方式,其它设备采用WiFi通信方式。路由器部署为MQTT服务器,手机等控制设备为MQTT客户端,并在服务器上进行SSL通信相关的配置、设计客户端程序。每次外部网络的MQTT客户端访问服务器时,先采用安全的内网穿透方案ZeroTier连接到内部网络,再通过SSL协议产生公钥和证书,进行安全通信。提出基于L-P混沌系统交叉扩散方法产生AES初始轮密钥,并用于ZigBee安全通信。实验结果为外网MQTT客户端和服务器可以连接到一个ZeroTier网络,并通过SSL协议安全通信;ZigBee通信方式达到了加密效果,相对标准AES算法,加密时间短、平均端到端通信延迟小,分别降低了3.77%和28.5%,且能量消耗少,节点平均剩余能量提高了30.22%。因此,实验结果表明,本文提出的通信方法安全,且具有应用性。

Research on the Secure Communication of Smart Home System based on ZigBee

At present, the smart home system based on wireless technology has brought comfort and convenience to people, but the system is vulnerable to attack, and there are more private data to be protected. For the data security problem in wireless communication, a kind of smart home system and its secure communication method is designed, namely, the networking structure of the system is designed, external network and internal network are planned. The home device nodes in internal collect information and apply ZigBee to communicate mode, while other devices apply WiFi to communicate. The router is deployed as MQTT server, mobile phones and other control devices are MQTT clients, and SSL communication is configured on server, client program is designed. While the MQTT client in the external network accesses the server, it uses first secure intranet penetration scheme of Zerotier to connect to the internal network, and then generates public keys and certificates by SSL protocol for secure communication. The cross diffusions method of L-P chaotic system is proposed to generate AES initial round key, and applied to ZigBee secure communication. The experimental results are that MQTT client in internet and server can connect to a ZeroTier network and communicate securely through SSL protocol can communicate securely; ZigBee communication mode achieves the encryption effect, compared with the standard AES algorithm, it is shorter encryption time and shorter communication delay, which are reduced by 3.77%, and 28.5% respectively, and less energy consumption, the average residual energy of nodes is increased by 30.22%. Therefore, the experimental results show that the communication method proposed in this paper is secure and applicable.