Layered Access Method for Heterogeneous Data in the Internet of Things Based on Data Sensitivity
Different sources and types of data in the Internet of Things constitute heterogeneous data,which has differ-ent formats,protocols and standards.The heterogeneity creates difficulties for secure data access and management.Therefore,hierarchical access to heterogeneous data in the Internet of Things was investigated based on data sensitivity.By obtaining low rank coefficients of data based on parameter changes,constructing a heterogeneous data matrix for the Internet of Things,and evaluating the information sensitivity of heterogeneous data within this matrix,a hierarchical data access model was established.By determining user access permissions based on information sensitivity and historical access re-cords,and breaking away from security threshold thinking,and in combination with user access permissions to determine whether to deny access or allow access,the layered access to heterogeneous data in the Internet of Things was realized.The experimental results showed that the average response delay of the proposed method for layered access does not ex-ceed 2 000 ms,and the highest success probability of data layering reaches 98％,and the average hit rate of data layer-ing access is 98.1％.The security of layered access is high,which makes the layered access a practical method.
Internet of Thingsheterogeneous dataLagrange coefficientEuler's formulalayered access method
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