Security remains a top concern for IoT developers in 2020,and distributed ledgers have emerged as a way to secure IoT solutions.Blockchain has gradually become an important solution to IoT security problems because of its decentralization,immutability and traceability.However,IoT devices cannot meet the computing and storage resources demand of blockchain due to their large scale and resource constraints.This paper conducts a preliminary survey of some representative international papers devoted to the use of blockchain to solve IoT security problems,through the technology they employ,the design of the security problem,and the attacks they addressed,whether there are resource constraints and so on.It is found that there is still a lot of research space for the integration of blockchain and the IoT,especially the integration framework,the design of blockchain and consensus mechanism,etc.are the keys to whether it can be applied to large-scale IoT practical application sce-narios.
关键词
区块链/物联网/物联网安全/身份验证/访问控制
Key words
blockchain/IoT/IoT security/authentication/access control
维普
万方数据