Cryptography – Key management – Key distribution
Reexamination Certificate
2004-12-15
2010-12-28
Popham, Jeffrey D (Department: 2437)
Cryptography
Key management
Key distribution
Reexamination Certificate
active
07860255
ABSTRACT:
A content distribution system distributes contents. The content distribution system includes a key issuing center, a server, eight output apparatuses, and a communication path that connects them to each other. The key issuing center and each of the output apparatuses are previously given an individual key shared between them. For example, the key issuing center shares individual key IKa with an output apparatus, individual key IKb with an output apparatus, and individual key IKh with an output apparatus.
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Futa Yuichi
Inoue Tetsuya
Kumazaki Yoji
Nonaka Masao
Ohmori Motoji
Panasonic Corporation
Popham Jeffrey D
Wenderoth , Lind & Ponack, L.L.P.
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