Research on security access model of coal mine safety supervision cloud data based on blockchain

The management and control of coal mine safety supervision cloud data is very strict, and the design of access authority should satisfy the requirements of classification and security. At present, coal mine safety supervision cloud data has the problems of unclear classification and hierarchy and weak confidentiality in the security management and contrd dimension. And the existing cloud data management and control models are difficult to meet the security requirements of coal mine safety supervision data. In order to solve the above problems, the security access model of coal mine safety supervision cloud data based on blockchain is designed, including access authority model and access control model. Based on the analysis of the access attributes and access objects of coal mine safety supervision cloud data, an access authority model based on user hierarchy and data attributes is designed. The model realizes the classification and hierarchy management and control of cloud data and dynamic generation of authority. Based on the advantages of distributed realization, full transparency and tamper-proof of blockchain, the cloud data access control model is constructed. The model realizes distributed access control, ensures the security of access control by intelligent contract, and enhances the security protection of authority information by encryption technology. The comparative analysis results shows that compared with the common role-based access control(RBAC) model and attribute-based access control(ABAC) model, the access authority model based on user hierarchy and data attributes realizes the fine-grained access authority division for the coal mine safety supervision cloud data. The user authority is intuitive, the authority rules are simple to generate. The access authority model meets the security requirements of the coal mine safety supervision cloud data. Compared with the access control model based on the third party, the access control model based on the blockchain uses the intelligent contract for access control. The model can enhance the security of the coal mine safety supervision cloud data, provide a new solution for the cloud data security problem, and meets the needs of data security access in more scenarios.