Research On Key Technologies Of Of Mass Data Sharing Based On Blockchain Technology

With the popularization of Io T devices,more and more innovative applications have emerged.In the meantime these applications generate a large amount of Io T data.To realize the great vision of connecting all objects in the real world to the Internet and making communication between things and things,people and things more convenient.We must consider Io T data transmission and sharing.However,up to now,cloud centric sharing architecture of the Internet of things,which can not establish full trust,leading to organizations are unwilling to share or fear sharing.Because data cannot be interconnected,it limits the potential of the Internet of Things to analyze global data to create unlimited value.Therefore,it is necessary to propose a new architecture to ensure high-level data sharing,reduce the pressure on centralized servers,and realize valuable data exchange.Blockchain can realize the decentralized verification of transactions,thereby greatly saving costs and alleviating the performance pressure of the central organization.Blockchain providing a new solution for Io T data sharing.The key problem of massive data sharing based on blockchain technology is to study the methods to improve the speed of data access authentication between heterogeneous organizations and the long-term self-operation method without operators.First of all,in view of the slow speed of authentication protocol in the process of crossdomain access,a method for optimizing the speed of data access authorization between heterogeneous organizations is proposed.Based on certificateless public key cryptography and smart contract technology,a certificateless cross-domain authentication scheme that supports parameter differentiation is designed and implemented.Through theoretical analysis and experiments,comparing the communication volume,identity signature and verification calculation cost,it is verified that the proposed method effectively improves the ability to quickly complete cross-domain identity authorization authentication.Secondly,in order to solve the problem that there must be a third-party platform to operate the data sharing system and use tokens to encourage users to participate,a long-term selfoperation method for massive data sharing system without operators is proposed.Based on the theory of two-way auction and smart contract technology,a quality driven incentive contract for two-way auction is designed and implemented.Through simulation experiments,comparing the participant utility and system social welfare in the case of continuous competition in shortterm and long-term scenarios.It is verified that the proposed method,an incentive mechanism for long-term participation in data sharing,achieves a completely distributed,without additional token incentives,and can attract more users.