Abstract
A role and node based access control model(RNBAC model) for industrial control network is proposed, which is aimed at satisfying the high-security requirements in the industrial control network by improving the problem of static authorization in a role-based access control model(RBAC model). The RNBAC model utilizes the deterministic characteristics of nodes in the industrial control network and the predictable characteristics of node information, and introduces a series of concepts such as nodes. First, give the formal definition of RNBAC model. Then, discuss the node trust calculation, user access threshold calculation and user trust value. Finally, verify that the RNBAC model can dynamically manage user access behavior in a scenario of the industrial control network, laying a foundation in the use of RNBAC model in the real environment.
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