Secure Distribution of Video On-Demand

• US 20110185380A1
• Filed: 03/25/2011
• Published: 07/28/2011
• Est. Priority Date: 03/12/1999
• Status: Active Grant

• Current Assignee: Comcast IP Holdings I LLC (Comcast Corporation)
• Original Assignee: Comcast IP Holdings I LLC (Comcast Corporation)
• Inventors: Goode, Christopher, Son, Yong Ho
• Granted Patent: US 8,370,883 B2
• Time in Patent Office: Days
• US Class Current: 725/31
• CPC Class Codes: H04N 21/2347 involving video stream encryption
• CPC Class Codes: H04N 21/23473 by pre-encrypting
• CPC Class Codes: H04N 21/23476 by partially encrypting, e.g. encrypting the ending portion of a movie
• CPC Class Codes: H04N 21/4542 Blocking scenes or portions of the received content, e.g. censoring scenes
• CPC Class Codes: H04N 21/47202 for requesting content on demand, e.g. video on demand
• CPC Class Codes: H04N 7/1675 Providing digital key or authorisation information for generation or regeneration of the scrambling sequence pseudo-random number generators in general G06F7/58
• CPC Class Codes: H04N 7/17309 Transmission or handling of upstream communications
• CPC Class Codes: H04N 7/17318 Direct or substantially direct transmission and handling of requests

Abstract

An interactive information distribution system for providing secure distribution of video-on-demand content. The interactive information distribution system includes at least one programming source for storing at least one partially encrypted video program, and a distribution center including a remote server. The remote server stores the at least one partially encrypted video program received from the at least one programming source. The remote server also processes the partially encrypted video program corresponding to a subscriber requested video program to produce a fully encrypted video program. A subscriber-side distribution network, coupled to the distribution center, causes transmission of the fully encrypted video program to the requesting subscriber.

Claims

1. A method, comprising:

processing, by a remote server of a distribution center of a content provider, a video program encrypted in a first encrypted form received from at least one programming source to produce a modified version of the video program;

processing, by the remote server, the modified version of the video program to produce a video program in a second encrypted form;

receiving, by the remote server, a user request for the video program; and

as a response to the user request, transmitting, by the remote server, the video program in the second encrypted form to a user device using a portion of the distribution network of the content provider.

2. The method of claim 1, wherein the video program encrypted in the first encrypted form is a video-on demand program encrypted in the first encrypted form, the user request is requesting the video-on demand program, and the distribution center is located at a location of the content provider.

3. The method of claim 1, further comprising:

transmitting a decryption key to the user device, the decryption key being necessary to decrypt the video program in the second encrypted form.

4. The method of claim 3, wherein the decryption key and the video program in the second encrypted form are transmitted to the user device separately.

5. The method of claim 1, wherein the at least one programming source includes one or more of the following:

a broadcast source, a premium broadcast source, a video-on-demand source.

6. The method of claim 1, wherein transmitting the video program in the second encrypted form to the user device uses a first communications channel of the distribution network;

and the method further comprises;

transmitting a decryption key to the user device using a second communications channel of the distribution network.

7. The method of claim 1, wherein the video program in the second encrypted form is encrypted according to a Data Encryption Standard (DES).

8. The method of claim 1, wherein the video program in the second encrypted form is multiplexed with other signals to create a multiplexed signal for transmission to the user device.

9. A system, comprising:

a distribution center of a content provider comprising a remote server, the remote server configured to;

process a video program encrypted in a first encrypted form received from at least one programming source to produce a modified version of the video program,

process the modified version of the video program to produce a video program in a second encrypted form,

receive a user request for the video program, and

as a response to the user request, transmit the video program in the second encrypted form to a user device using a portion of the distribution network of the content provider.

10. The system of claim 9, wherein the video program encrypted in the first encrypted form is a video-on demand program encrypted in the first encrypted form, the user request is requesting the video-on demand program, and the distribution center is located at a location of the content provider.

11. The system of claim 9, wherein the remote server is configured to cause transmission of a decryption key to the user device, the decryption key being necessary to decrypt the video program in the second encrypted form.

12. The system of claim 11, wherein the decryption key and the video program in the second encrypted form are transmitted to the user device separately.

13. The system of claim 9, wherein the at least one programming source includes one or more of the following:

a broadcast source, a premium broadcast source, a video-on-demand source.

14. The system of claim 9, wherein the video program in the second encrypted form is transmitted to the user device using a first communications channel of the distribution network;

and the remote server is configured to;

transmit a decryption key to the user device using a second communications channel of the distribution network.

15. The system of claim 9, wherein the video program in the second encrypted form is encrypted according to a Data Encryption Standard (DES).

16. The system of claim 9, wherein remote server is configured to multiplex the video program in the second encrypted form with other signals to create a multiplexed signal for transmission to the user device.

17. A method, comprising:

processing, by a remote server of a distribution center of a content provider, a video program encrypted in a first encrypted form received from at least one programming source to produce a modified version of the video program;

processing, by the remote server, the modified version of the video program to produce a video program in a second encrypted form;

receiving, by the remote server, a user request; and

as a response to the user request, transmitting, by the remote server, the video program in the second encrypted form to the user device using one of the content provider'"'"'s distribution networks.

18. The method of claim 17, wherein the video program encrypted in the first encrypted form is a video-on demand program encrypted in the first encrypted form, the user request is requesting the video-on demand program, and the distribution center is located at a location of the content provider.

19. The method of claim 17, wherein the at least one programming source includes one or more of the following:

a broadcast source, a premium broadcast source, a video-on-demand source.

20. A system, comprising:

a distribution center of a content provider comprising a remote server, the remote server configured to;

process a video program encrypted in a first encrypted form received from at least one programming source to produce a modified version of the video program,

process the modified version of the video program to produce a video program in a second encrypted form,

receive a user request for the video program, and

as a response to the user request, transmit the video program in the second encrypted form to a user device using one of the content provider'"'"'s distribution networks.