Information security – Prevention of unauthorized use of data including prevention... – Access control
Reexamination Certificate
2011-01-18
2011-01-18
Pyzocha, Michael (Department: 2437)
Information security
Prevention of unauthorized use of data including prevention...
Access control
C713S168000, C380S201000
Reexamination Certificate
active
07874014
ABSTRACT:
The present invention relates to a content distribution server or the like, capable of more surely preventing an unauthorized use of a content. Content distribution servers2and3are arranged to be connectable via a telecommunication circuit to a user terminal device, and include: a distribution-content storing section14for storing a distribution content file composed of: content data; and a regulatory program including a first key for regulating reproducing the content data; a key storing section15for storing a second key which forms a pair with the first key; a key generating section34for generating, when receiving the terminal identification information transmitted from the user terminal device, a third key including the received terminal identification information and information of the second key; and transmitting controllers16and34for transmitting the third key to the user terminal device. When the distribution content file is opened on the user terminal device, the regulatory program transmits the terminal identification information to the content distribution servers2and3before the content data are reproduced.
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Heartland Co., Ltd.
Pyzocha Michael
Westerman Hattori Daniels & Adrian LLP
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