Location Information Storage System Of Internet Of Things Devices Based On Blockchain

With the rapid improvement of hardware performance and software technology,the types of Internet of things devices are becoming more and more abundant,which makes their application field more extensive.Due to the uneven production quality and the lack of censorship mechanism,floods of devices are exposed with very serious security problems.One common phenomenon is that Internet of things equipment location information leak out or is used illegally.Traditional methods of protecting location information,like approximately processing numeric data,are not suitable for the current location-based service scenario.It's an inevitable trend to realize the protection and sharing of massive user equipment precise location information.A new solution is urgently needed to solve the problem of safe storage and rational use of equipment location information.Blockchain is the first distributed record system with trust mechanism,which builds a reliable architecture without central control through the information redundancy of multiple nodes.Blockchain technology has been successfully applied to the bitcoin project,and its characteristics of anonymity and no-modification have been verified.Based on the above information,this thesis proposes a device location information storage scheme which introduces the feature of blockchain on the basis of traditional database.This study solves two levels of problems:protecting users' location privacy by eliminating connections between users and devices,safely sharing location information by setting user's permissions independently.In the design of the Alliance-chain storage system,the asymmetric key technology is used to realize the effective authentication of anonymous identity,which is maintained by many device manufacturers together.Finally,the feasibility of the system used for the safe storage of location information is successfully verified by the experiment.