Won Jay Song Won Hee Kim Bo Gwan Kim Minho Kang Mun Kee Choi Contents protection system using smart card interface for digital CATV network based on the OpenCable specification. 693-702 2003 49 IEEE Trans. Consumer Electron. 3 https://doi.org/10.1109/TCE.2003.1233806 db/journals/tce/tce49.html#SongKKKC03