Abstract
With the adoption of mobile healthcare applications and the success of cloud service models, we propose a privacy management framework for mobile health care applications with support for dynamic privacy management of health data sharing. Our solution extends the XACML policy language by incorporating user access context into the privacy policy rule enforcement. We provide an implementation of our approach that builds on top of the Google App Engine cloud platform. We also provide a preliminary evaluation that indicates that the overhead incurred by our approach is minimal.