System and method for content validation

• US 9,602,882 B2
• Filed: 08/19/2014
• Issued: 03/21/2017
• Est. Priority Date: 12/10/2008
• Status: Active Grant

• Current Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Ramankrishnan, Kadangode K., Gopalakrishnan, Vijay, Yu, Fang
• Primary Examiner(s): Maung, Zarni
• Application Number:
  US14/463,346
• Publication Number:
  US 20140359682A1
• Time in Patent Office: 945 Days
• Field of Search: 709/203, 709223-229, 709231-232
• US Class Current: 1/1
• CPC Class Codes: H04L 65/612 for unicast
• CPC Class Codes: H04L 9/40 Network security protocols
• CPC Class Codes: H04N 21/26258 for generating a list of items to be played back in a given order, e.g. playlist, or scheduling item distribution according to such list retrieval of multimedia data based on playlists G06F16/40
• CPC Class Codes: H04N 21/47202 for requesting content on demand, e.g. video on demand
• CPC Class Codes: H04N 21/632 using a connection between clients on a wide area network, e.g. setting up a peer-to-peer communication via Internet for retrieving video segments from the hard-disk of other client devices broadcast-related systems characterised by transmission among terminal devices H04H60/80; distributed application using peer-to-peer [P2P] networks H04L67/104
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 21/8352 involving content or source identification data, e.g. Unique Material Identifier [UMID]
• CPC Class Codes: H04N 21/8456 by decomposing the content in the time domain, e.g. in time segments
• CPC Class Codes: H04N 7/17318 Direct or substantially direct transmission and handling of requests

Abstract

A method includes receiving at a directory server a notification from a client system, where the notification indicates that the first client received a corrupt packet of a playfile from a first peer. The method also includes determining if the first peer is a poor quality peer, updating a first peer score for the first peer if the first peer is not a poor quality peer, identifying a second peer that is not on a blacklist, and providing a peer identification associated with the second peer to the client system.

Claims

1. A system, comprising:

a memory that stores instructions;

a processor that executes the instructions to perform operations, the operations comprising;

receiving a playfile associated with content, wherein the playfile includes a first hash of a portion of a chunk of the content;

receiving the chunk of the content from a source of the content;

calculating a second hash of the chunk received from the source of the content;

determining if the first hash of the portion of the chunk matches the second hash of the chunk; and

identifying, when the first hash of the portion of the chunk is determined to not match the second hash of the chunk, a new source for obtaining the chunk.

2. The system of claim 1, wherein the operations further comprise discarding, when the first hash of the portion of the chunk is determined to not match the second hash of the chunk, the chunk received from the source of the content.

3. The system of claim 1, wherein the operations further comprise utilizing the chunk of the content when the first hash of the portion of the chunk is determined to match the second hash of the chunk.

4. The system of claim 1, wherein the operations further comprise determining, when the first hash of the portion of the chunk is determined to not match the second hash of the chunk, that the chunk received from the source of the content is corrupted.

5. The system of claim 1, wherein the operations further comprise determining if the source of the content is a trusted source.

6. The system of claim 5, wherein the operations further comprise utilizing, when the source of the content is determined to be the trusted source, the chunk of the content received from the source of the content.

7. The system of claim 1, wherein the operations further comprise determining, when the source of the content is a peer, that the source of the content is not a trusted source.

8. The system of claim 1, wherein the operations further comprise not calculating the second hash of the chunk when the source of the content is a trusted source.

9. The system of claim 1, wherein the operations further comprise downloading, when the first hash of the portion of the chunk is determined to not match the second hash of the chunk, the chunk from the new source.

10. A method, comprising:

receiving a playfile associated with content, wherein the playfile includes a first hash of a portion of a chunk of the content;

receiving the chunk of the content from a source of the content;

calculating, by utilizing instructions from memory that are executed by a processor, a second hash of the chunk received from the source of the content;

determining if the first hash of the portion of the chunk matches the second hash of the chunk; and

identifying, when the first hash of the portion of the chunk is determined to not match the second hash of the chunk, a new source for obtaining the chunk.

11. The method of claim 10, further comprising discarding, when the first hash of the portion of the chunk is determined to not match the second hash of the chunk, the chunk received from the source of the content.

12. The method of claim 10, further comprising utilizing the chunk of the content when the first hash of the portion of the chunk is determined to match the second hash of the chunk.

13. The method of claim 10, further comprising determining, when the first hash of the portion of the chunk is determined to not match the second hash of the chunk, that the chunk received from the source of the content is corrupted.

14. The method of claim 10, further comprising determining if the source of the content is a trusted source.

15. The method of claim 14, further comprising utilizing, when the source of the content is determined to be the trusted source, the chunk of the content received from the source of the content.

16. The method of claim 10, further comprising determining, when the source of the content is a peer, that the source of the content is not a trusted source.

17. The method of claim 10, further comprising not calculating the second hash of the chunk when the source of the content is a trusted source.

18. The method of claim 10, further comprising downloading, when the first hash of the portion of the chunk is determined to not match the second hash of the chunk, the chunk from the new source.

19. A computer readable device comprising instructions, which, when loaded and executed by a processor, cause the processor to perform operations, the operations comprising:

receiving a playfile associated with content, wherein the playfile includes a first hash of a portion of a chunk of the content;

receiving the chunk of the content from a source of the content;

calculating a second hash of the chunk received from the source of the content;

determining if the first hash of the portion of the chunk matches the second hash of the chunk; and

identifying, when the first hash of the portion of the chunk is determined to not match the second hash of the chunk, a new source for obtaining the chunk.

20. The computer-readable device of claim 19, wherein the operations further comprise determining, when the first hash of the portion of the chunk is determined to not match the second hash of the chunk, that the chunk received from the source of the content is corrupted.