Authentication of identification documents and banknotes
First Claim
Patent Images
1. A method comprising:
- selecting a set of data from at least one of a photograph or information, wherein the information and photograph are carried by a physical document, the document further including a design;
reducing the selected set of data to a first number; and
altering characteristics of the design according to the first number,wherein evidence of the altered design characteristics is found through analysis of data corresponding to the altered design characteristics in both a spatial domain and a frequency domain, andwherein the evidence in either of the spatial domain or the frequency domain provides an authentication clue.
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Abstract
The present invention provides methods and systems that are helpful authentication of physical and electronic documents like financial documents and identification documents. Steganographic indicia plays a role in some of our implementations. In other implementations we bind design features to a user or to a document. In still other implementations we provide authentication methods to evaluate security documents.
208 Citations
26 Claims
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1. A method comprising:
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selecting a set of data from at least one of a photograph or information, wherein the information and photograph are carried by a physical document, the document further including a design; reducing the selected set of data to a first number; and altering characteristics of the design according to the first number, wherein evidence of the altered design characteristics is found through analysis of data corresponding to the altered design characteristics in both a spatial domain and a frequency domain, and wherein the evidence in either of the spatial domain or the frequency domain provides an authentication clue. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of marking a banknote comprising:
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providing a pattern including a group of concentric shapes; modifying characteristics of the pattern, said act of modifying resulting at least in part in a modified pattern; and changing data representing information or artwork to be placed on or in the banknote in accordance with the modified pattern, wherein evidence associated with the modified pattern is found through analysis of data corresponding to the modified pattern in a frequency domain, and wherein the evidence in the frequency domain provides an indication. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 21)
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20. An apparatus comprising:
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a receiver mechanism to receive digital data representing a physical banknote, the banknote comprising a modified pattern including a group of concentric shapes, the modified pattern being represented on the banknote through changes to information or data carried by the banknote; and a processor comprising hardware or processing circuitry to; transform the data into a frequency domain, wherein evidence associated with the modified pattern is found through analysis of data corresponding to the modified pattern in the frequency domain, identify the evidence in the frequency domain, the evidence indicating that the banknote is a banknote; and provide a signal to prevent reproduction of the banknote based at least in part on the evidence.
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- 22. A banknote comprising a modified pattern including a group of concentric shapes, the modified pattern being represented on the banknote through alterations to artwork or graphics carried by the banknote, wherein evidence associated with the modified pattern is found through analysis of data corresponding to the modified pattern in a frequency domain, and wherein the evidence provides an indication.
Specification