Method and apparatus for implementing revocation in broadcast networks
First Claim
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1. A method for controlling access to copy controlled content to a host device comprising:
- receiving copy controlled content;
receiving a revocation list corresponding to a given range of host identifiers;
verifying that an identifier of a host device associated with an access module is within the range of host identifiers;
determining whether the host device associated with the access module is on the revocation list after the identifier of the host device is verified to be within the range of the host identifiers for the revocation list; and
if the identification of the host device is on the revocation list, causing the associated access module to deny the copy controlled content to the host device.
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Abstract
A method of revoking a descrambling privilege for copy controlled content to a host device is provided. The method includes receiving copy controlled content at a conditional access module. A revocation list is also received at the module. The method includes determining whether the host device associated with the module is on the list. If so, the conditional access module will not descramble the content.
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Citations
42 Claims
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1. A method for controlling access to copy controlled content to a host device comprising:
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receiving copy controlled content;
receiving a revocation list corresponding to a given range of host identifiers;
verifying that an identifier of a host device associated with an access module is within the range of host identifiers;
determining whether the host device associated with the access module is on the revocation list after the identifier of the host device is verified to be within the range of the host identifiers for the revocation list; and
if the identification of the host device is on the revocation list, causing the associated access module to deny the copy controlled content to the host device. - View Dependent Claims (2, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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3. A method comprising:
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receiving copy controlled content;
receiving a revocation list corresponding to a given range of host identifiers;
the revocation list is received out of band over a separate channel from a digital bitstream including the copy controlled content;
determining whether a host device associated with an access module is on the revocation list; and
if the host device is on the revocation list, causing the associated access module to deny the copy controlled content to the host device. - View Dependent Claims (4)
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16. An apparatus for controlling access to copy controlled content to a host device comprising:
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means for receiving copy controlled content;
means for receiving a revocation list corresponding to a range of identifiers;
means for determining whether a host device associated with an access module is on the revocation list after an identifier of the host device is determined to be within the range of identifiers associated with the revocation list;
means for causing the access module to deny the copy controlled content to the host device if the identifier associated with the host device is on the revocation list. - View Dependent Claims (17, 18, 19, 20)
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21. A computer readable medium containing instructions, which when executed by a processing system, controls access to copy controlled content, the computer readable medium comprising:
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means for receiving copy controlled content;
means for receiving a plurality of revocation lists each corresponding to a different range of host identifiers;
means for determining whether a host device associated with an access module is on the revocation list by initially verifying whether an identifier of the host device is within a range of host identifiers associated with one of the plurality of revocation lists, and if so, verifying whether the identifier of the host device is contained in the one of the plurality of revocation lists;
means for causing the associated access module to deny the copy controlled content to the host device. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A device for controlling access to copy controlled content, comprising:
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a tuner to tune to a selected frequency for receipt of the copy controlled content;
a demodulator unit coupled to the tuner, the demodulator unit to demodulate the copy controlled content and output the demodulated copy controlled content; and
an access unit configured to receive the demodulated copy controlled content and a plurality of revocation lists each corresponding to a different range of host identifiers, the access unit to determine whether an identifier of the device is within a range of any of the plurality of revocation lists, and if so, to (i) determine whether the identifier of the device on one of the plurality of revocation lists and (ii) deny the copy controlled content to the device if the identifier is listed on one of the plurality of revocation lists. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35)
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36. A method for controlling access to copy controlled content to a device comprising:
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receiving a revocation list corresponding to a given range of identifiers;
verifying that an identifier of a device is within the range of idnetifiers;
determining whether the device is on the revocation list after the identifier of the device is verified to be within the range of the identifies for the revocation list; and
denying copy controlled content to the device if the device is on the revocation list. - View Dependent Claims (37, 38, 39, 40, 41, 42)
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Specification