×

Hiding and Detecting Auxiliary Data in Media Materials and Signals

  • US 20100172538A1
  • Filed: 10/13/2009
  • Published: 07/08/2010
  • Est. Priority Date: 11/18/1993
  • Status: Active Grant
First Claim
Patent Images

1. A method comprising the acts:

  • receiving plural-symbol identification data, each symbol having one of plural values;

    receiving pseudo-random data;

    combining the identification data and the pseudo-random data to yield a 2D pattern, wherein the combining includes applying the identification data and the pseudo-random data to a hardware processor, the processor deciding—

    based on the applied data—

    to combine certain of the applied data in the 2D pattern, but not to combine other of the applied data in the 2D pattern; and

    providing data corresponding to the 2D pattern for input to a marking system, to steganographically mark on a substrate.

View all claims
  • 5 Assignments
Timeline View
Assignment View
    ×
    ×