With the progress of new technologies of information management, Ubiquitous Resource Management (URM) is a dominant areas of research which requires efficient access management approaches. There have been huge challenges of controlling access to ubiquitous resources among collaborative multi-servers based on the negotiating security policies on URMs. However, the traditional access control mechanisms were insufficient to meet the requirements of role assignment management for URMs that allow accessing services via huge clients. Therefore, Ubiquitous RBAC (Role-based Access Control) with CBR (case-based reasoning) based negotiation technique is proposed in this paper. The novel RBAC scheme could efficiently manage not only one ubiquitous server, but also multiple ubiquitous servers on the cooperation domain through supporting both negotiating role assignment (NRA) task and cooperative role assignment (CRA) task in URM-platform by using a spiral negotiating process. Furthermore, it solves the difficulties in reducing the costs of ubiquitous computing resources, e.g., the role reassigned rate, handover rate, bandwidth, and power consumption, etc. Due to the ease of use and its efficiency in negotiating and managing the user-to-role as well as virtual role assignment by applying CBR approach, it is a highly powerful strategy of information management for conducting the innovative research and design for ubiquitous RBAC scheme.
