In a protected media path for delivering content from a source to a sink, a source authority (SOTA) on behalf of the source decides with regard to a policy corresponding to the content that a particular type of action with the content is to be refused, and provides a particular enabler to an application....http://www.google.se/patents/US8095985?utm_source=gb-gplus-sharePatent US8095985 - Protected media path and refusal response enabler
