New role-based access control in ubiquitous e-business environment

Ubiquitous e-business is one of major topics in intelligent manufacturing systems. Ubiquitous e-business environment requires security features including access control. Traditional access control models such as access control list (ACL), mandatory access control (MAC), and role-based access control (RBAC) are unsuitable for a ubiquitous e-business environment because they cannot satisfy its requirements. In this study, we propose a new access control model termed the Ubi-RBAC model. It is based on the RBAC model and adds new components such as space, space hierarchy, and context constraints. Ubi-RBAC covers the context awareness and mobility of subjects (human users), which are the key issues of access control in the ubiquitous e-business environment.