Research On Access Control Model Of Smart Home System Based On Blockchain And Trust Management Mechanism

As the smart home system is gradually being realized,the quality of life of residents is improved.At the same time,smart home systems also bring many privacy and security concerns.To solve such problems,the access control model is the most effective means,which can prevent attackers from accessing the data on the device.And it plays a crucial role in the protection of resources and information in the smart home system.However,the environment of a smart home system is a dynamic and distributed Io T network environment.Therefore,the traditional access control model faces some security and performance challenges,such as performance bottlenecks,single point of failure,permission tampering,and inflexible authorization methods.Trust management is a promising solution to the problem that traditional access control models cannot perform flexible authorization in a dynamic and distributed environment,enabling dynamic and secure authorization.In addition,the rise of blockchain technology as a decentralized and immutable data protection mechanism is paving the way for addressing the shortcomings of the centralized authorization method of the traditional access control model.Based on the distributed capability access control model,this paper proposes a capability access control model that combines smart contracts and trust management mechanisms to achieve safe and reliable access control for smart home systems.First of all,Considering the limited resource of equipment in smart home systems,this paper proposes a lightweight framework for smart home systems based on blockchain.It ensures the privacy,security,and integrity of data in smart home systems.Then,on the basis of this framework,a blockchain-based device trust management mechanism is designed.The trust management mechanism gradually quantifies the trust value of each device in the smart home system.And it incorporates the trust value of the device into the access control model to achieve dynamic and flexible access control.Through experiments and simulations,it is found that the trust management mechanism can improve the trust degree and safety factor of the devices in the smart home system.Finally,on the framework and trust management mechanism,the smart contract technology is used to realize the capability access control model.Furthermore,the function test and performance test of the model are carried out.Theoretical and simulation analysis shows that the capability access control model based on smart contracts and trust management mechanism can effectively improve the execution efficiency and security in the access authorization process of smart home systems.As a result it can provide reliable and efficient access control for smart home systems.