Won Jay Song Won Hee Kim Bo Gwan Kim Byung-Ha Ahn Mun Kee Choi Minho Kang Conditional Access Module Systems for Digital Contents Protection Based on Hybrid/Fiber/Coax CATV Networks. 155-162 http://springerlink.metapress.com/openurl.asp?genre=article&issn=0302-9743&volume=2869&spage=155 2003 conf/iscis/2003 ISCIS db/conf/iscis/iscis2003.html#SongKKACK03