Dynamic digital watermark

• US 9,497,349 B2
• Filed: 08/27/2014
• Issued: 11/15/2016
• Est. Priority Date: 08/28/2013
• Status: Active Grant

• Current Assignee: Idemia Identity & Security USA, LLC (Advent International Corporation)
• Original Assignee: Morphotrust USA Incorporated (Advent International Corporation)
• Inventors: Martin, Brian
• Primary Examiner(s): CHANG, JON CARLTON
• Application Number:
  US14/470,499
• Publication Number:
  US 20150063625A1
• Time in Patent Office: 811 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: G06T 1/0071 using multiple or alternating watermarks
• CPC Class Codes: G06T 1/0085 Time domain based watermarking, e.g. watermarks spread over several images
• CPC Class Codes: G06T 2201/0062 Embedding of the watermark in text images, e.g. watermarking text documents using letter skew, letter distance or row distance
• CPC Class Codes: G06T 2201/0065 Extraction of an embedded watermark; Reliable detection
• 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 1/32309 in colour image data
• CPC Class Codes: H04N 1/32325 the embedded data being visible
• CPC Class Codes: H04N 1/32352 Controlling detectability or arrangements to facilitate detection or retrieval of the embedded information, e.g. using markers for decoding, detection or retrieval operations H04N1/32149 and subgroups take precedence

Abstract

Some implementations may provide a computer-implemented method for validating a digital document, the method including: receiving, at a computing device, the digital document comprising at least two digital watermarks, the digital document issued by a central entity; retrieving a first digital watermark from the digital document, the first digital watermark visually presented at a first time point; retrieving a second digital watermark from the digital document, the second digital watermark visually presented at a second time point, the second digital watermark being different from the first digital watermark and the second time point being different from the first time point; and reading the digital document based on the retrieved first and second digital watermarks.

Claims

1. A computer-implemented method for reading a digital identification document, the method comprising:

receiving, at a computing device, the digital identification document comprising at least two digital watermarks, the digital identification document issued by a central entity;

retrieving a first digital watermark from the digital identification document, the first digital watermark visually presented at a first time point;

retrieving a second digital watermark from the digital identification document such that a sequence of digital watermarks is retrieved, the sequence comprising the first digital watermark and the second digital watermark, the second digital watermark visually presented at a second time point, the second digital watermark being different from the first digital watermark and the second time point being different from the first time point; and

validating the digital identification document as authentic based on the first digital watermark, the second digital watermark, as well as a sequential order of the sequence of digital watermarks.

2. The method of claim 1, wherein retrieving the sequence of digital watermarks comprises:

retrieving a sequence of digital watermarks comprising the first digital watermark, the second digital watermark, and a third digital watermark, the third digital watermark being different from the first digital watermark and the second digital watermark.

3. The method of claim 1, further comprising:

analyzing the sequence of digital watermarks to confirm that the digital identification document is issued by the central entity.

4. The method of claim 1, further comprising:

analyzing the sequence of digital watermarks to confirm that a person holding the digital identification document is the person identified by the sequence of digital watermarks.

5. The method of claim 1, further comprising:

detecting a first temporal pattern in which the first digital watermark is visually presented intermittently.

6. The method of claim 5, further comprising:

decoding, from the first temporal pattern, information linking an entity who has generated the digital identification document; and

determining whether the linked entity is the central entity.

7. The method of claim 5, further comprising:

decoding, from the first temporal pattern, information linking a holder of the digital identification document; and

determining whether the linked holder is the person presenting the digital identification document.

8. The method of claim 1, further comprising:

detecting a second temporal pattern in which the second digital watermark is visually presented intermittently.

9. The method of claim 8, further comprising:

decoding, from the second temporal pattern, information linking an entity who has generated the digital identification document; and

determining whether the linked entity is the central entity.

10. The method of claim 8, further comprising:

decoding, from the second temporal pattern, information linking a holder of the digital identification document; and

determining whether the linked holder is the person presenting the digital identification document.

11. The method of claim 1, further comprising:

extracting information from the first digital watermark, the information correlatable with data encoded by the second digital watermark;

correlating the extracted information with data encoded by the second digital watermark; and

using results of the correlation to determine whether the digital identification document is authentic.

12. The method of claim 1, further comprising:

extracting information from the second digital watermark, the information correlatable with data encoded by the first digital watermark;

correlating the extracted information with data encoded by the first digital watermark; and

using results of the correlation to determine whether the digital identification document is authentic.

13. A mobile computing device for authenticating a person, the mobile computing device comprising at least one processor configured to perform operations comprising:

receiving, at a mobile device, a digital identification document comprising at least two digital watermarks, the digital identification document issued by a central entity;

retrieving a first digital watermark from the digital identification document, the first digital watermark visually presented at a first time point;

retrieving a second digital watermark from the digital identification document such that a sequence of digital watermarks is retrieved, the sequence comprising the first digital watermark and the second digital watermark, the second digital watermark visually presented at a second time point, the second digital watermark being different from the first digital watermark and the second time point being different from the first time point; and

validating the digital identification document as authentic based on the first digital watermark, the second digital watermark, as well as a sequential order of the sequence of digital watermarks.

14. The mobile computing device of claim 13, wherein retrieving the sequence of digital watermarks comprises:

retrieving a sequence of digital watermarks comprising the first digital watermark, the second digital watermark, and a third digital watermark, the third digital watermark being different from the first digital watermark and the second digital watermark.

15. The mobile computing device of claim 13, wherein the operations further comprise:

analyzing the sequence of digital watermarks to confirm that the digital identification document is issued by the central entity.

16. The mobile computing device of claim 13, wherein the operations further comprise:

analyzing the sequence of digital watermarks to confirm that a person holding the digital identification document is the person identified by the sequence of digital watermarks.

17. The mobile computing device of claim 13, wherein the operations further comprise:

detecting a first temporal pattern in which the first digital watermark is visually presented intermittently.

18. The mobile computing device of claim 17, wherein the operations further comprise:

decoding, from the first temporal pattern, information linking an entity who has generated the digital identification document; and

determining whether the linked entity is the central entity.

19. The mobile computing device of claim 17, wherein the operations further comprise:

decoding, from the first temporal pattern, information linking a holder of the digital identification document; and

determining whether the linked holder is the person presenting the digital identification document.

20. The mobile computing device of claim 13, wherein the operations further comprise:

detecting a second temporal pattern in which the second digital watermark is visually presented intermittently.

21. The mobile computing device of claim 20, wherein the operations further comprise:

decoding, from the second temporal pattern, information linking an entity who has generated the digital identification document; and

determining whether the linked entity is the central entity.

22. The mobile computing device of claim 20, wherein the operations further comprise:

decoding, from the second temporal pattern, information linking a holder of the digital identification document; and

determining whether the linked holder is the person presenting the digital identification document.

23. The mobile computing device of claim 13, wherein the operations further comprise:

extracting information from the first digital watermark, the information correlatable with data encoded by the second digital watermark;

correlating the extracted information with data encoded by the second digital watermark; and

using results of the correlation to determine whether the digital identification document is authentic.

24. A non-transitory computer-readable medium, on which software instructions are stored, which instructions, when executed by a computer processor, cause the computer processor to perform the operations of:

receiving a digital identification document comprising at least two digital watermarks, the digital identification document issued by a central entity;

retrieving a first digital watermark from the digital identification document, the first digital watermark visually presented at a first time point;

retrieving a second digital watermark from the digital identification document such that a sequence of digital watermarks is retrieved, the sequence comprising the first digital watermark and the second digital watermark, the second digital watermark visually presented at a second time point, the second digital watermark being different from the first digital watermark and the second time point being different from the first time point; and

validating the digital identification document as authentic based on the first digital watermark, the second digital watermark, as well as a sequential order of the sequence of digital watermarks.