关键词: 物联网, 区块链, 智能合约, 去中心化, 安全问题

Abstract: As a large number of mobile terminals are connected to the Internet of Things for information exchange and communication、 identity authentication、data transmission、single point of failure and other security problems are exposed, the security problem of the Internet of Things is a challenge to the Internet of Things technology. Because the traditional security technology is mostly based on the centralization system and the limitation of the topology structure of the Internet of Things, the traditional security technology can only be applied to specific industries. Block chain technology has the characteristics of decentralization, data encryption, smart contract and so on, especially suitable in the complex heterogeneous network. Based on the research of block chain security mechanism and elliptic curve digital signature, the Internet of Things model based on block chain technology is proposed. Based on the security problems faced by the Internet of Things and the block chain technology, this paper studies the characteristics of the application of block chain in the Internet of Things, and proposes the Internet of Things model based on the block chain technology, so as to provide reference for enterprise security.

Key words: IOT, block chain, smart contract, decentralization, security issues