Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular node for directing data and applying cryptography
Reexamination Certificate
2011-01-04
2011-01-04
Chen, Shin-Hon (Department: 2431)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular node for directing data and applying cryptography
C713S165000, C713S166000, C713S189000, C713S193000
Reexamination Certificate
active
07865716
ABSTRACT:
A key distribution system distributes key data for using content to a second encryption device that has been legitimately outsourced processing by a first encryption device. The first encryption device acquires permission information indicating that the first encryption device has permission to use the content, generates certification information by making an irreversible alteration the to permission information, and transmits the permission information and the certification information to the second encryption device. The second encryption device receives the permission information and the certification information, sends them to a key distribution device, and acquires the key data from the key distribution device. The key distribution device receives the permission information and the certification information, judges whether or not the certification information was generated by the by the first encryption device, and if judging in the affirmative, transmits the key data to the second encryption device.
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Ishihara Hideshi
Nakano Toshihisa
Tatebayashi Makoto
Chen Shin-Hon
Panasonic Corporation
Wenderoth , Lind & Ponack, L.L.P.
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