Augmentation in UCON Access Control Model for E-Healthcare Domain

Nowadays, computing environment is dynamically changing which demands for new technical approaches to cope with the increasing security challenges. Access control is one of the earliest computer securities and it still remains a continuing challenge. There are many traditional access control models available but some of them uses static authorization decisions which implies subjects have preassigned permission on objects, so it is more of a closed system and hence not suitable in a dynamic environment. UCON has emerged as next generation usage control model suitable for a modern computing environment. In this paper we propose an enhanced architecture of UCON model using cloud infrastructure. This enhanced architecture apart from including all features of UCON can scale effectively as per user demand, isolates sensitive and non-sensitive data, and ensures data transmission via secure network. For implementation we have extended Sun's implementation of XACML and have used Microsoft's Cloud Azure.