Abstract:

Nowadays, after the Internet, Internet of Things brings great changes to people’s production and life as a new direction of the third industrial revolution and the future internet technology. The development and application of Internet of Things has achieved remarkable results in recent years. A large number of sensors are connected to the machines and are combined with the Internet, which achieves intelligent management and operation. At the same time, the security and privacy problem in the Internet of Things environment is still the one of the threats to the Internet of Things technology. Because of the topology of the Internet of Things as well as the constraint of resources, the traditional security technologies are not entirely applicable to the Internet of Things. As the basic technology of bitcoin, block chain technology has the characteristics of decentralization, detrust, data encryption and so on. It is suitable for building a distributed system. This paper analyzes the characteristics of block chain technology to solve the security problems in the application of Internet of Things, and discusses the security problems of the combination of block chain and Internet of Things.

Key words: block chain, Internet of Things, privacy protection