Utilizing data reduction in steganographic and cryptographic systems

• US 10,461,930 B2
• Filed: 01/02/2018
• Issued: 10/29/2019
• Est. Priority Date: 03/24/1999
• Status: Expired due to Term

• Current Assignee: Wistaria Trading Inc.
• Original Assignee: Wistaria Trading Inc.
• Inventors: Moskowitz, Scott A., Berry, Mike W.
• Primary Examiner(s): Hoffman, Brandon S
• Application Number:
  US15/860,267
• Publication Number:
  US 20180109382A1
• Time in Patent Office: 665 Days
• Field of Search: None
• 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
• CPC Class Codes: G06T 1/0021 Image watermarking
• CPC Class Codes: H04L 2209/046 of operations, operands or results of the operations
• CPC Class Codes: H04L 2209/608 Watermarking
• CPC Class Codes: H04L 9/16 the keys or algorithms being changed during operation
• 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 1/32272 Encryption or ciphering

Abstract

The present invention relates to methods for protecting a data signal using the following techniques: applying a data reduction technique to reduce the data signal into a reduced data signal; subtracting the reduced data signal from the data signal to produce a remainder signal; embedding a first watermark into the reduced data signal to produce a watermarked, reduced data signal; and adding the watermarked, reduced data signal to the remainder signal to produce an output signal. A second watermark may be embedded into the remainder signal before the final addition step. Further, cryptographic techniques may be used to encrypt the reduced data signals and to encrypt the remainder signals before the final addition step.

Claims

1. A method of protecting a data signal comprising the steps of:

applying a data reduction technique to reduce the data signal into a reduced data signal;

subtracting said reduced data signal from the data signal to produce a remainder signal;

embedding a first watermark into said reduced data signal to produce a watermarked, reduced data signal; and

adding said watermarked, reduced data signal to said remainder signal to produce an output signal.

2. The method of claim 1, wherein said data signal defines executable code.

3. The method of claim 1, wherein said data signal defines computer code.

4. The method of claim 1, wherein said data signal defines binary code.

5. The method of claim 1, wherein said data signal defines executable binary code.

6. The method of claim 1, further comprising the step of splitting the data signal into distinct streams.

7. The method of claim 6 wherein one of said distinct streams comprises video data and another one of said distinct stream does not comprise video data.

8. The method of claim 6 wherein one of said distinct streams comprises video data and another one of said distinct streams does not comprise video data.

9. The method of claim 6 wherein one of said distinct streams comprises aesthetic information and another one of said distinct streams does not comprise aesthetic information.

10. The method of claim 6 wherein one of said distinct streams comprises video data and another one of said distinct streams comprises text data.

11. A method of protecting a data signal comprising the steps of:

applying a data reduction technique to reduce the data signal into a reduced data signal;

subtracting said reduced data signal from the data signal to produce a remainder signal;

scrambling said reduced data signal to produce a scrambled reduced data signal; and

adding said scrambled reduced data signal to said remainder signal to produce an output signal.

12. The method of claim 11, wherein said data signal defines executable code.

13. The method of claim 11, wherein said data signal defines computer code.

14. The method of claim 11, wherein said data signal defines binary code.

15. The method of claim 11, wherein said data signal defines executable binary code.

16. The method of claim 11, further comprising the step of splitting the data signal into distinct streams.

17. The method of claim 16 wherein one of said distinct streams comprises video data and another one of said distinct stream does not comprise video data.

18. The method of claim 16 wherein one of said distinct streams comprises video data and another one of said distinct streams does not comprise video data.

19. The method of claim 16 wherein one of said distinct streams comprises aesthetic information and another one of said distinct streams does not comprise aesthetic information.

20. The method of claim 16 wherein one of said distinct streams comprises video data and another one of said distinct streams comprises text data.