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Power systems management and associated information exchange. Data and communications security - Role-based access control Ingestion-build-107062 Annex E (informative) Accelerated image-stability1 Scope This technical specification covers the access control of users and automated agents in the following subjects to data objects in power systems by means of role based access control (RBAC). RBAC is not a new concept used by many operating systems to control access to system resources. RBAC is an alternative to the all or nothing super user model. RBAC is in keeping with the security principle of least privilege, which states that no subject