Multiple selective encryption with DRM
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
N/A
Issued Date -
Aug 4, 2005
app pub date -
Oct 13, 2004
filing date -
Feb 3, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method of encrypting a digital television signal consistent with certain embodiments involves examining unencrypted packets of data in the digital television signal to identify a packet type; duplicating packets identified as being of the packet type to create first and second duplicate packets; encrypting the first duplicate packets according to a conditional access encryption method to create conditional access encrypted packets; encrypting the second duplicate packets according to a Digital Rights Management (DRM) encryption method to create DRM encrypted packets; and replacing the unencrypted packets of the packet type with the conditional access encrypted packets and the DRM encrypted packets in the digital television signal to produce a multiple partially encrypted digital television signal. This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.
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