Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Central trusted authority provides computer authentication
Reexamination Certificate
2007-05-15
2007-05-15
Moazzami, Nasser (Department: 2136)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Central trusted authority provides computer authentication
C713S155000, C713S193000, C380S270000, C380S277000
Reexamination Certificate
active
10130302
ABSTRACT:
A license server (10) includes a CRL database (306) holding a revocation list recording therein classes predetermined corresponding respectively to a memory device, such as a memory card, and a content reproduction circuit, such as a cellular phone, that are subjected to revocation of distributing, reproducing and transferring content data. A distribution control unit (315) suspends an operation distributing content data if the distribution is addressed to a class listed on the revocation list. The revocation list is also held in the memory card and distribution control unit (315) in distributing content also transmits information for updating the revocation list in the memory card.
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Anazawa Takeaki
Furuta Shigeki
Hasebe Takayuki
Hatakeyama Takahisa
Hioki Toshiaki
Abedin Santo M Z
Moazzami Nasser
Sanyo Electric Co,. Ltd.
Westerman, Hattori, Daniels & Adrian , L.L.P.
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