A device is classified into a plurality of categories. Disabling data for disabling a device key owned by a particular device of each category is generated for each category from a medium key and device key data owned by the device belonging to each category and recorded in a recording medium.
申请公布号
WO2005013550(A1)
申请公布日期
2005.02.10
申请号
WO2004JP11303
申请日期
2004.07.30
申请人
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.;YAMAMOTO, NAOKI;ISHIHARA, HIDESHI;TATEBAYASHI, MAKOTO;NAKANO, TOSHIHISA
