A Hybrid Sharing Control Model for Context Sharing and Privacy in Collaborative Systems

Complex Web-based information systems involving multiple entities and their dynamic mobile-based collaborations require efficient techniques for context information sharing. Sharing control is a requirement for preserving the privacy of personal context and shared context. Our sharing control mechanism is hybrid, based on sharing control rules defined by enterprise as well as by individuals users. Our complex scenario involves multiple entities which require prioritization and conflict handling mechanism for entities and their policy rules. This paper presents a sharing control model, Web services-based architecture and its implementation with a running example. The system is evaluated by comparing our hybrid sharing control policy with enterprise-defined role -based policy and shows effectiveness of our hybrid policy in collaborative information sharing environments.