物联网的安全和隐私保护是物联网服务能否大规模应用的关键，物联网的多源异

The security and privacy protection of the Internet of Things are the key to the large-scale application of Internet of Things services. The multi-source heterogeneity of the Internet of Things makes its security face huge challenges. As far as a single network is concerned, the Internet and mobile communication networks have been established. A number of effective mechanisms and methods have provided abundant information resources for our daily life and work, and have changed the way people live and work. Relatively speaking, the security research of the sensor network is still in the initial stage, and a complete solution has not been provided. Due to the resource limitation of the sensor network, it is more difficult to study the security problem. Therefore, the security of the sensor network Research will be an important part of IoT security. At the same time, how to establish an effective multi-network integration security architecture, establish a unified security model that spans multiple networks, and form an effective joint coordinated defense system is also one of the important research directions.

The security and privacy protection of the Internet of Things is the key to the large-scale application of Internet of Things services, the multi-source heterogeneity of the Internet of Things makes its security face great challenges, as far as a single network is concerned, the Internet, mobile communication network, etc. have established some effective mechanisms and methods, for our schedule life and work to provide a wealth of information resources, changed people's lives and ways of working. Relatively speaking, the security research of sensor network is still in the initial stage, has not yet provided a complete solution, because of the resource limitation of sensor network, which makes the research of security problem more difficult, therefore, the security research of sensor network will be an important part of Internet of Things security. At the same time, how to establish an effective multi-network fusion security architecture, establish a unified security model across the multi-network, the formation of an effective common coordinated defense system is also one of the important research directions.

The security and privacy protection of the Internet of things is the key to the large-scale application of the Internet of things. The multi-source heterogeneity of the Internet of things makes its security face great challenges. As far as a single network is concerned, the Internet and mobile communication network have established a series of effective mechanisms and methods, providing rich information resources for our daily life and work, and changing people's lives and work operation mode. Relatively speaking, the security research of sensor network is still in the initial stage, and a complete solution has not been provided. Due to the resource limitation of sensor network, the research on the security problem of sensor network is more difficult. Therefore, the security research of sensor network will be an important part of the security of the Internet of things. At the same time, how to establish an effective multi network fusion security architecture, establish a unified security model across multiple networks, and form an effective coordinated defense system is also one of the important research directions.<br>