XPACML eXtensible Privacy Access Control Markup Langua

Privacy in the digital world is a critical problem which is becoming even more imperious with the growth of the Internet, accompanied by the proliferation of e-services (e.g. e-commerce, e-health). One research track for efficient privacy management is to make use of user's and service provider's (SP) privacy policies, and to perform an automatic comparison in between to help any (skilled or unskilled) users preserving their privacy.