Bechara al Bouna Richard Chbeir Stefania Marrara Enforcing role based access control model with multimedia signatures. 264-274 2009 55 Journal of Systems Architecture - Embedded Systems Design 4 http://dx.doi.org/10.1016/j.sysarc.2008.10.003 db/journals/jsa/jsa55.html#BounaCM09