System reactions to the detection of embedded watermarks in a digital host content

• US 8,103,049 B2
• Filed: 03/11/2008
• Issued: 01/24/2012
• Est. Priority Date: 04/26/2005
• Status: Expired due to Fees

• Current Assignee: Verance Corporation
• Original Assignee: Verance Corporation
• Inventors: Petrovic, Rade, Tehranchi, Babak, Winograd, Joseph M.
• Primary Examiner(s): Le, Vu
• Assistant Examiner(s): Allison, Andrae S
• Application Number:
  US12/075,596
• Publication Number:
  US 20080310673A1
• Time in Patent Office: 1,414 Days
• Field of Search: 382/100, 382/232, 380/20, 380/28, 380/54, 713/176, 713/179, 713/181
• US Class Current: 382/100
• CPC Class Codes: G06T 1/0071 using multiple or alternating watermarks
• CPC Class Codes: G10L 19/018 Audio watermarking, i.e. embedding inaudible data in the audio signal
• CPC Class Codes: H04L 2209/608 Watermarking
• CPC Class Codes: H04L 9/002 Countermeasures against attacks on cryptographic mechanisms network architectures or network communication protocols for protection against malicious traffic H04L63/1441
• CPC Class Codes: H04L 9/088 Usage controlling of secret information, e.g. techniques for restricting cryptographic keys to pre-authorized uses, different access levels, validity of crypto-period, different key- or password length, or different strong and weak cryptographic algorithms network architectures or network communication protocols for using time-dependent keys in a packet data network H04L63/068
• CPC Class Codes: H04N 1/00037 Detecting, i.e. determining the occurrence of a predetermined state H04N1/00031 takes precedence
• CPC Class Codes: H04N 1/00872 by image quality reduction, e.g. distortion or blacking out
• CPC Class Codes: H04N 1/00875 Inhibiting reproduction, e.g. by disabling reading or reproduction apparatus
• CPC Class Codes: H04N 1/32144 embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
• CPC Class Codes: H04N 1/32149 Methods relating to embedding, encoding, decoding, detection or retrieval operations
• CPC Class Codes: H04N 1/32299 using more than one embedding method
• CPC Class Codes: H04N 1/32304 Embedding different sets of additional information
• CPC Class Codes: H04N 1/3232 Robust embedding or watermarking
• CPC Class Codes: H04N 1/32331 Fragile embedding or watermarking
• CPC Class Codes: H04N 2201/323 for tracing or tracking, e.g. forensic tracing of unauthorized copies

Abstract

Methods for adapting the operation of a system in response to the detection of embedded watermarks from a digital host content are provided. A digital host content is received and examined for the presence of watermarks. In response to the detection of embedded watermarks and in accordance with the value, type, density or spacing of the detected watermarks, one or more system reactions may take place. These reactions include conditionally allowing the system to resume its normal operation, prohibiting the system from resuming its normal operation, degrading the quality of the digital host content or changing the security status of the digital host content. In response to the extraction of weak watermarks that do not meet the desired system requirements, the extraction operation may be modified or extended to enable the detection of strong watermarks.

Claims

1. A method for adapting the operation of a system in response to the detection of multiple watermark states from a digital host content, comprising:

receiving said digital host content;

detecting embedded watermarks from at least two monitoring intervals in said digital host content;

analyzing said detected watermarks to determine a watermark state of each of said detected watermarks, each watermark state having a distinct enforcement rule associated therewith;

selecting one of said enforcement rules associated with said detected watermarks for use in operation of said system; and

commencing an enforcement action if at least a first watermark state is detected from two or more monitoring intervals, said enforcement action corresponding to said enforcement rule associated with said first watermark state.

2. The method of claim 1, wherein:

a most restrictive enforcement rule associated with said detected watermarks is selected.

3. The method of claim 1, wherein

a least restrictive enforcement rule associated with said detected watermarks is selected.

4. The method of claim 1, wherein said enforcement action comprises at least one of:

permitting normal operation of said system,

conditionally permitting an operation of said system;

prohibiting normal operation of said system;

modifying a status of said digital host content; and

degrading a quality of said digital host content.

5. The method of claim 1, wherein said first watermark state is detected in accordance with a predefined value, type, density or spacing associated with said detected watermarks.

6. The method of claim 1, wherein said enforcement action is extended in response to detection of an additional watermark state.

7. The method of claim 1, wherein a duration of said enforcement action is selected randomly.

8. The method of claim 1, wherein a duration of said monitoring intervals is selected randomly.

9. A device, comprising:

a processor; and

a memory comprising processor executable code, said processor executable code, when executed by said processor, configures said device to;

receive a digital host content;

detect embedded watermarks from at least two monitoring intervals in said digital host content;

analyze said detected watermarks to determine a watermark state of each of said detected watermarks, each watermark state having a distinct enforcement rule associated therewith;

select one of said enforcement rules associated with said detected watermarks for use in operation of system; and

commence an enforcement action if at least a first watermark state is detected from two or more monitoring intervals, said enforcement action corresponding to said enforcement rule associated with said first watermark state.

10. The device of claim 9, wherein said processor executable code, when executed by said processor, configures said device to select a most restrictive enforcement rule associated with said detected watermarks.

11. The device of claim 9, said processor executable code, when executed by said processor, configures said device to select a least restrictive enforcement rule associated with said detected watermarks.

12. The device of claim 9, wherein said enforcement action comprises at least one of:

permitting normal operation of said system,

conditionally permitting an operation of said system;

prohibiting normal operation of said system;

modifying a status of said digital host content; and

degrading a quality of said digital host content.

13. The device of claim 9, wherein said processor executable code, when executed by said processor, configures said device to detect said first watermark state in accordance with a predefined value, type, density or spacing associated with said detected watermarks.

14. The device of claim 9, wherein said processor executable code, when executed by said processor, configures said device to extend said enforcement action in response to detection of an additional watermark state.

15. The device of claim 9, wherein said processor executable code, when executed by said processor, configures said device to randomly select a duration of said enforcement action.

16. The device of claim 9, wherein said processor executable code, when executed by said processor, configures said device to randomly select a duration of said monitoring intervals.

17. A non-transitory computer readable medium with program code embodied thereupon, said program code configured to:

receive a digital host content;

detect embedded watermarks from at least two monitoring intervals in said digital host content;

analyze said detected watermarks to determine a watermark state of each of said detected watermarks, each watermark state having a distinct enforcement rule associated therewith;

select one of said enforcement rules associated with said detected watermarks for use in operation of a system; and

commence an enforcement action if at least a first watermark state is detected from two or more monitoring intervals, said enforcement action corresponding to said enforcement rule associated with said first watermark state.

18. A non-transitory computer-readable medium with a host content embodied thereupon, said host content comprising:

one or more watermarks that are imperceptibly embedded in said host content, wherein upon reception of said host content by a content handling device equipped with a watermark extractor triggers said watermark extractor to;

detect embedded watermarks from at least two monitoring intervals in said digital host content;

analyze said detected watermarks to determine a watermark state of each of said detected watermarks, each watermark state having a distinct enforcement rule associated therewith;

select one of said enforcement rules associated with said detected watermarks for use in operation of a system; and

commence an enforcement action if at least a first watermark state is detected from two or more monitoring intervals, said enforcement action corresponding to said enforcement rule associated with said first watermark state.