Jinhyung Kim Jun Hwang Taemin Kim Byungwook Lee Device Certification System and Method for User's Convenient Contents Use. 553-558 2007 FGCN (2) http://dx.doi.org/10.1109/FGCN.2007.103 conf/fgcn/2007 db/conf/fgcn/fgcn2007.html#KimHKL07