Information security – Prevention of unauthorized use of data including prevention...
Reexamination Certificate
2004-07-30
2009-11-17
Moazzami, Nasser G (Department: 2436)
Information security
Prevention of unauthorized use of data including prevention...
C380S277000, C380S278000, C380S279000
Reexamination Certificate
active
07620993
ABSTRACT:
Apparatuses are classified into a plurality of categories, and based on a media key and device key data held by apparatuses belonging to the respective categories, revocation data intended for revoking the device key held by a specific apparatus of the respective categories is generated for the respective categories, and recorded on a recording medium.
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Makoto Tatebayashi et al., entitled “Content Protection System for Recordable Media(Kiroku Media no Contents Hogo System)”, Information and Communication Engineers Kiso, Kyokai Society Taikai Koen Ronbunshu, Sep. 7, 2000, pp. 367-368.
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Ishihara Hideshi
Nakano Toshihisa
Tatebayashi Makoto
Yamamoto Naoki
Moazzami Nasser G
Panasonic Corporation
Pogmore Travis
Wenderoth , Lind & Ponack, L.L.P.
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