Hierarchical Cipher for Controlling Access to Multimedia Contents
Masaaki Fujiyoshi, Wataru Saitou, Shoko Imaizumi, and Hitoshi Kiya,
“Hierarchical Cipher for Controlling Access to Multimedia Contents,”
in Proc. of International Technical Conference on Circuits Systems, Computers and Communications/, vol.II, no.WAM1-4-4, pp.69-72, Chiang Mai, Thailand, 12th July, 2006.