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Method and apparatus for generating and authenticating security documents

  • US 9,652,814 B2
  • Filed: 03/27/2012
  • Issued: 05/16/2017
  • Est. Priority Date: 03/29/2011
  • Status: Active Grant
First Claim
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1. A method for generating a document for use with a personal identifier, personal data and an image, the method comprising:

  • inputting the personal identifier into a processor, the personal identifier including alphanumerical characters identifying a user;

    inputting the personal text data into the processor;

    inputting an image of the user into the processor;

    generating, by the processor, a first Message Authentication Code (MAC) based on the personal identifier;

    generating, by the processor, a periodic wave structure based on the MAC, the periodic wave structure is an image of periodic wavy lines which are each positioned based on the MAC, the periodic wave structure is defined as;

    x′

    y′

    =f(x,y,a,b,c,d), where;

    a is a first portion of the MAC,b is a second portion of the MAC,c is a third portion of the MAC,d is a remaining portion of the MAC,x includes a plurality of different horizontal axis coordinates in the image,y includes a plurality of different vertical axis coordinates in the image,x′

    are horizontal axis coordinates of the wavy lines,y′

    are vertical axis coordinates of the wavy lines, andf is a periodic function;

    generating, by the processor, a periodic waved microtext by replacing the periodic wavy lines at the x′ and

    y′

    coordinates of the periodic wave structure with alphanumerical characters of personal text data of the user;

    generating, by the processor, a letter screen image from the input image with the periodic waved microtext, by recreating the image of the user by altering selected portions of the periodic waved microtext at the x′ and

    y′

    coordinates; and

    outputting the letter screen image.

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