During the present era, mobiles and smart devices are in abundance. A number of services have been provided through these devices. Ubiquitous services is gaining popularity in the present era. Ubiquity in healthcare is a sector which has gained importance in the current decade, as medical costs are not affordable to the common man. Ubiquitous healthcare has scope in seamlessly monitoring patients and identifying their health conditions. However privacy is at risk when using ubiquitous healthcare as personal health data are given to third party individuals for monitoring, storage and retrieval. This paper proposes a privacy preserving model of an e-health system, so as to maintain the security of patient data across different domains in the e-health system. Copyright 2015 ACM.