| As an important support for the country's strategic emerging industries,the Internet of Things is the core and foundation of smart cities,military defense,and intelligent manufacturing.The interconnection of all things,open sharing,and security are the foundation for the healthy development and widespread application of the Internet of Things industry.The Internet of Things device divides the management domain according to the attribution,and forms a multi-domain.Aiming at the characteristics of sea-based data,such as sea quantification,isomerization and decentralization,this thesis focuses on multi-domain Io T data sharing and exchange architecture and block-chain-based context-sensitive and fine-grained adaptive access control method.The domain Io T data sharing and exchange platform realizes sub-domain system interconnection and intercommunication,data crossdomain controlled sharing,service cross-domain controlled collaboration,and application system cross-domain controlled linkage.Aiming at the characteristics and requirements of massive Io T data heterogeneous data,data domain storage,and data cross-domain integration,a multi-domain Io T decentralized data sharing exchange architecture is proposed to realize the dynamic unified identification and cross-distribution of massively differentiated data and services.Domain collaborative management.The proposed data sharing switching architecture can be compatible with differentiated networking nodes and heterogeneous Io T systems,and realizes data domaindomain storage and service domain-distributed deployment centered on massive heterogeneous data,with high availability and loose coupling,and is an application system.Interconnection provides the basic guarantee.Aiming at the characteristics and requirements of Io T system sharing openness and diversified access rights requirements,this paper studies the multi-domain Internet of Things massive resources cross-domain access rights management method,and proposes a blockchain-based fine-grained context-sensitive access control mechanism for cross-domain Resource request scenario,a model and method of Cap BAC is proposed.Compared with RBAC and ABAC in 10 domain scenarios The average authorization time is shortened by 2ms and reduced by 1%.The blockchain-based Cap BAC implements distributed and decentralized rights management,which reduces the single point of failure of authorization management.For a single intra-domain scenario,a Ris BAC is proposed,compared to ACL,when the access history is less than 400,the average authorization time of Ris BAC is 70% of ACL,and the single-node server supports 800 permission decisions at the same time.Ris BAC passes history.Dynamically change the access record and resource sensitivity,dynamically judge the authority,and meet the dynamic changes of the Io T scenario.Based on the technology and method,a multi-domain Io T data sharing exchange platform is designed and implemented,and the platform has functions of heterogeneous data access,data identification,data visualization,service release registration,service management,and rights management,and the system has single node support.The concurrency is 800,and the average response time is 500 ms,which satisfies the real-time and performance requirements of data sharing exchange.The platform has been applied in the dream town of Chang'an University City,and the sub-domain system of the access sub-domain sharing open platform has verified the research.Availability of technology and methods. |
