CONTENT IDENTIFICATION METHOD AND SYSTEM, AND SCIDM CLIENT AND SERVER

• US 20090319639A1
• Filed: 08/07/2009
• Published: 12/24/2009
• Est. Priority Date: 06/19/2008
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Gao, Hongtao, Liu, Yijun
• Granted Patent: US 8,527,651 B2
• Time in Patent Office: Days
• US Class Current: 709/219
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/16 Program or content traceability, e.g. by watermarking

Abstract

A content identification method and system, and a secure content identification mechanism (SCIDM) client and server are provided. The content identification method includes: selecting an identification mechanism for a content to be identified; extracting identification information of the content to be identified corresponding to the selected identification mechanism; and sending a first content identification request, in which the first content identification request contains the selected identification mechanism and the identification information, and is adapted to request an SCIDM server to identify an attribute of the content to be identified by using the identification mechanism and according to the identification information. Thus, a load of a content identification system is reduced, and an efficiency of content identification is improved.

Claims

1. A content identification method, comprising:

selecting an identification mechanism for a content to be identified;

extracting identification information of the content to be identified corresponding to the selected identification mechanism; and

sending a first content identification request, wherein the first content identification request comprises the selected identification mechanism and the identification information and is adapted to request a secure content identification mechanism (SCIDM) server to identify an attribute of the content to be identified by using the identification mechanism and according to the identification information.

2. The content identification method according to claim 1, wherein the selecting the identification mechanism for the content to be identified comprises:

selecting the identification mechanism for the content to be identified according to a load condition of a content identification system, a specific application scenario, or preset security requirements.

3. The content identification method according to claim 2, wherein the identification mechanism comprises a content ID-based identification mechanism, a tampering history-based identification mechanism, a content metadata-based identification mechanism, a watermark-based identification mechanism, or a fingerprint-based identification mechanism;

and the identification information comprises a content ID, content size information, content source address information, content destination address information, metadata, a digital watermark or a content fingerprint of the content to be identified.

4. The content identification method according to claim 3, wherein the extracting the identification information of the content to be identified corresponding to the selected identification mechanism comprises:

extracting the content ID and first auxiliary identification information of the content to be identified when the selected identification mechanism is the content ID-based identification mechanism, wherein the first auxiliary identification information comprises the content size information;

extracting the content ID and second auxiliary identification information of the content to be identified when the selected identification mechanism is the tampering history-based identification mechanism, wherein the second auxiliary identification information comprises the content source address information or the content destination address information;

extracting the metadata of the content to be identified when the selected identification mechanism is the content metadata-based identification mechanism;

extracting the digital watermark in the content to be identified when the selected identification mechanism is the watermark-based identification mechanism; and

extracting the content fingerprint of the content to be identified when the selected identification mechanism is the fingerprint-based identification mechanism.

5. The content identification method according to claim 3, wherein after sending the first content identification request, the method further comprises:

selecting a new identification mechanism when correct identification instruction information sent by the SCIDM server is received;

or selecting a new identification mechanism when identification failure information sent by the SCIDM server is received and the identification mechanism comprised in the first content identification request is not the fingerprint-based identification mechanism;

additionally extracting identification information corresponding to the new identification mechanism; and

sending a second content identification request to the SCIDM server, wherein the second content identification request comprises the new identification mechanism and the additionally extracted identification information.

6. The content identification method according to claim 3, wherein the sending the first content identification request comprises:

encapsulating a plurality of selected identification mechanisms and the identification information corresponding to each of the selected identification mechanisms into the first content identification request, and sending the first content identification request to the SCIDM server.

7. A secure content identification mechanism (SCIDM) client, comprising:

a selecting module, adapted to select an identification mechanism for a content to be identified;

an extracting module, adapted to extract identification information of the content to be identified corresponding to the selected identification mechanism; and

a sending module, adapted to send a first content identification request, wherein the first content identification request comprises the selected identification mechanism and the identification information and is adapted to request an SCIDM server to identify an attribute of the content to be identified by using the identification mechanism and according to the identification information.

8. The SCIDM client according to claim 7, wherein the selecting module is further adapted to select the identification mechanism for the content to be identified according to a load condition of a content identification system, a specific application scenario, or preset security requirements.

9. The SCIDM client according to claim 8, wherein the identification mechanism comprises a content ID-based identification mechanism, a tampering history-based identification mechanism, a content metadata-based identification mechanism, a watermark-based identification mechanism, or a fingerprint-based identification mechanism;

the identification information comprises a content ID, content size information, metadata, a digital watermark or a content fingerprint of the content to be identified; and

the extracting module comprises at least one of the following units;

a content information extracting unit, adapted to extract the content ID and first auxiliary identification information of the content to be identified when the identification mechanism selected by the selecting module is the content ID-based identification mechanism, wherein the first auxiliary identification information comprises the content size information;

a tampering history extracting unit, adapted to extract the content ID and second auxiliary identification information of the content to be identified when the identification mechanism selected by the selecting module is the tampering history-based identification mechanism, wherein the second auxiliary identification information comprises the content source address information or the content destination address information;

a metadata extracting unit, adapted to extract the metadata of the content to be identified when the identification mechanism selected by the selecting module is the content metadata-based identification mechanism;

a watermark extracting unit, adapted to extract the digital watermark in the content to be identified when the identification mechanism selected by the selecting module is the watermark-based identification mechanism; and

a fingerprint extracting unit, adapted to extract the content fingerprint of the content to be identified when the identification mechanism selected by the selecting module is the fingerprint-based identification mechanism.

10. The SCIDM client according to claim 9, wherein

the selecting module is further adapted to select a new identification mechanism when correct identification instruction information sent by the SCIDM server is received;

or select a new identification mechanism when identification failure information sent by the SCIDM server is received and the identification mechanism comprised in the first content identification request is not the fingerprint-based identification mechanism;

the extracting module is further adapted to additionally extract identification information corresponding to the new identification mechanism; and

the sending module is further adapted to send a second content identification request, wherein the second content identification request comprises the new identification mechanism selected by the selecting module and the identification information additionally extracted by the extracting module.

11. The SCIDM client according to claim 9, wherein the sending module is further adapted to encapsulate a plurality of identification mechanisms selected by the selecting module and the identification information extracted by the extracting module corresponding to each of the selected identification mechanisms into the first content identification request, and send the first content identification request.

12. A secure content identification mechanism (SCIDM) server, comprising:

an acquiring module, adapted to receive a first content identification request sent by an SCIDM client, and acquire an identification mechanism and identification information corresponding to the identification mechanism comprised in the first content identification request; and

an identifying module, adapted to identify an attribute of a content to be identified by using the identification mechanism and according to the identification information and prestored content data information.

13. The SCIDM server according to claim 12, further comprising:

a content database, adapted to store the content data information, wherein the content data information comprises actual attribute information, tampering records, actual watermark information, actual metadata, or protected content fingerprints of the content;

the actual attribute information comprises an actual content ID and actual content size information; and

the tampering records comprise a tampered content ID, content identification time information, content source address information, and content destination address information.

14. The SCIDM server according to claim 13, wherein the identifying module comprises at least one of the following units:

a content information identifying unit, adapted to query whether an actual content ID matching the content ID exists in the actual attribute information stored in a content database or not according to the content ID when the acquired identification mechanism is a content ID-based identification mechanism and the acquired identification information comprises a content ID and first auxiliary identification information of the content to be identified, adapted to compare whether the first auxiliary identification information corresponding to the stored actual content ID matches corresponding information comprised in the identification information or not if the actual content ID matching the content ID exists in the actual attribute information stored in the content database, and adapted to send a content identification success message if the first auxiliary identification information corresponding to the stored actual content ID matches corresponding information contained in the identification information, wherein the first auxiliary identification information comprises the content size information;

a tampering history identifying unit, adapted to query whether a tampered content ID matching the content ID exists in the stored tampering records or not according to the content ID when the acquired identification mechanism is a tampering history-based identification mechanism and the acquired identification information comprises the content ID and second auxiliary identification information of the content to be identified, adapted to acquire an actual content ID corresponding to the tampered content ID if the tampered content ID matching the content ID exists in the tampering records and the second auxiliary identification information matches corresponding information in the tampering records, and query the actual attribute information stored in the SCIDM server according to the actual content ID wherein the second auxiliary identification information comprises the content source address information or the content destination address information;

a metadata identifying unit, adapted to query whether actual metadata matching the metadata exists in the actual metadata stored in the content database or not according to the metadata when the identification mechanism acquired by the acquiring module is a content metadata-based identification mechanism and the acquired identification information comprises metadata of the content to be identified, and adapted to send a content identification success message if the actual metadata matching the metadata exists in the actual metadata stored in the content database;

a watermark identifying unit, adapted to query whether actual watermark information matching the digital watermark exists in the actual watermark information stored in the content database or not according to the digital watermark when the identification mechanism acquired by the acquiring module is a watermark-based identification mechanism and the acquired identification information comprises a digital watermark in the content to be identified, and adapted to send a content identification success message if the actual watermark information matching the digital watermark exists in the actual watermark information stored in the content database; and

a fingerprint identifying unit, adapted to query whether a protected content fingerprint matching the content fingerprint of the content to be identified exists in the stored protected content fingerprints or not according to the content fingerprint when the identification mechanism acquired by the acquiring module is a fingerprint-based identification mechanism, and the acquired identification information comprises a content fingerprint of the content to be identified, and adapted to send a content identification success message if the protected content fingerprint matching the content fingerprint of the content to be identified exists in the stored protected content fingerprints.

15. The SCIDM server according to claim 14, wherein the identifying module further comprises:

an identification instruction information sending unit, adapted to send correct identification instruction information to the SCIDM client for instructing the SCIDM client to additionally provide a content fingerprint corresponding to the content to be identified when the acquired identification mechanism is the content ID-based identification mechanism, the tampering history-based identification mechanism, the content metadata-based identification mechanism or the watermark-based identification mechanism, and the content identification fails.

16. The SCIDM server according to claim 15, wherein the identifying module is further adapted to receive a second content identification request comprising a new identification mechanism and additionally provided identification information sent by the SCIDM client, and identify the attribute of the content to be identified by using the new identification mechanism and according to the additionally provided identification information.

17. The SCIDM server according to claim 16, further comprising:

an update module, adapted to update or store a tampering record corresponding to the content to be identified according to the actual content ID, the tampered content ID, the content source address information, the content destination address information, or the content identification time information of the content to be identified when the identification mechanism acquired by the acquiring module is the content metadata-based identification mechanism, the watermark-based identification mechanism or the fingerprint-based identification mechanism, and the identifying module successfully identifies the content.

18. The SCIDM server according to claim 14, wherein when the received first content identification request comprises a plurality of identification mechanisms, the identifying module is further adapted to identify the attribute of the content to be identified by using the corresponding identification mechanisms in turn according to a preset execution order of the identification mechanisms.

19. A content identification system, comprising:

a secure content identification mechanism (SCIDM) client, adapted to select an identification mechanism for a content to be identified, extract identification information of the content to be identified corresponding to the selected identification mechanism, and send a first content identification request, wherein the first content identification request comprises the selected identification mechanism and the identification information; and

an SCIDM server, adapted to receive the first content identification request sent by the SCIDM client, and acquire the identification mechanism and the identification information corresponding to the identification mechanism comprised in the first content identification request, identify an attribute of the content to be identified by using the identification mechanism and according to the identification information and prestored content data information.