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US 2007/0192810 A1Published application
Encrypting Content In A Tuner Device And Analyzing Content Protection Policy
AssigneeMicrosoft Corporation
InventorsThaddeus Pritchett, Kenneth Reneris, Bernhard Kotzenberg, David Cheng
Life of this patent
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Abstract
A tuning device uses a counter mode encryption cipher to encrypt counters associated with media content in order to protect the media content when it is sent to requesting device or controller. The encrypted counters are decrypted in order to consume the media content. The controller may send particular direction to the tuning device as to how the media content, encrypted counters, and other associated data are sent to the controller.
Claims20
A method performed at a tuner device comprising:
- receiving a request from a requesting device for media content;
- establishing trust with the requesting device, that the media content can be sent to the requesting device;
- encrypting media content to the requesting device using a counter;
- wherein the requesting device can assign a specific counter to selective sub-streams;
- and the requesting device can assign a shared counter to other sub-streams.
2 more elements
A method performed at a device comprising:
- providing to tuner device, management rights of the device as to certain content;
- establishing a connection with the tuner device;
- requesting for encrypted or unencrypted content to be sent from the tuner device;
- and
- receiving the encrypted or unencrypted content through one or more streams.
2 more elements
A tuner device comprising:
- a processor;
- a packet identifier controlled by the processor, that identifies packets;
- a counter generator controlled by the processor, that provides distinct counters which have a default associated identified packet;
- an interface to a receiver device, wherein the receiver device configures which counters are associated to the identified packets;
- and
- an encrypter that encrypts the distinct counters, wherein the encrypted counters are combined with the packets and are sent to a device for consumption.
3 more elements
Dependencies are inferred from the claim text.