Research On Guaranteeing The Trustworthiness Of Data Sources In IoT

In the context of today's big data era,the trustworthiness of data is crucial for data analysis and processing.Most data in the Internet of Things(Io T)is collected by sensors,then stored and processed through the fog computing and cloud computing environments.But as sensor devices multiply in size,susceptible nodes are more vulnerable to attacks such as data tampering and unauthorized access.In addition,the complexity of the fog environment and cloud environment makes the data transmission in Io T subject to a new security test,resulting in a rapid increase in security risks.In order to reduce the security threats caused by data sources,this paper proposes security solutions from three perspectives of perception layer,fog environment and cloud environment,which are used to fully guarantee the credibility of the data source of Io T.For the perception layer of Io T,this paper combines a lightweight authentication algorithm and the trusted execution environment,proposing a security framework called SNPL on the basis of building the fingerprint value for the node devices.This solution verifies the legitimacy of the node's identity in a safe and isolated environment,achieving the purpose of filtering malicious data and guaranteeing the credibility of the source data collected by the terminal nodes.Experimental results show that the scheme is very effective in protecting the Io T perception layer from malicious node attacks.In order to solve the problem of secure data transmission and processing in Io T's fog computing environment,this paper implements smart contracts with multiple functions,while building blockchain networks with opposite nature based on the blockchain technology and identity verification algorithms.The propose is to build a safe sharing platform called SBBS for data exchange between various fog environments.Experimental results and performance analysis show that this framework can guarantee the security of node identities in fog environment,and at the same time can provide a safe and efficient way for data transmission.In addition,this paper proposes a security solution for the cloud computing environment to protect the data trustworthiness in the process of cloud storage,cloud computing and cloud service.Based on the initial concept of this design,combined with above security frameworks for Io T perception layer and the fog environment,through a series of security analysis and experimental verifications,to ensure that the data collected from the terminal nodes,transmitted and processed through the fog and cloud,and finally reaching the user,is safe and credible under the whole process.