System and method for limiting access to data
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United States of America Patent
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-
Aug 28, 2012
Grant Date -
Sep 8, 2005
app pub date -
Apr 11, 2005
filing date -
Dec 12, 2002
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A controlling device provides conditional access to secured content renderable by an appliance. The controlling device transmits a data frame to the appliance and encrypts at least a part of the data frame that includes data to be used by the appliance to provide access to the secured content. At the appliance a decryption key complimentary to the encryption key is used to decrypt the received the data frame. The appliance allows the secured content to be rendered only after the appliance determines that the data in the received, decrypted data frame includes the data the appliance requires to provide access to the secured content.
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