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Method and apparatus for high security crypto-marking for protecting valuable objects

  • US 5,139,812 A
  • Filed: 06/29/1990
  • Issued: 08/18/1992
  • Est. Priority Date: 07/07/1989
  • Status: Expired due to Fees
First Claim
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1. A high security crypto-marking method for protecting valuable objects in which a target chemical compound suitable for subsequent detection by an appropriate detection means is applied to an object to be marked, wherein the method comprises the following operations:

  • a) preparing a solution of a target nucleic acid having a known nucleotide sequence and possessing a selected degree of fluidity;

    b) incorporating a chosen quantity of said solution in each object of a class of objects to be marked; and

    c) identifying or authenticating the object by bringing a probe means including a chemical agent reactive with said target nucleic acid into contact with said target nucleic acid, and detecting a reaction between said agent and said target nucleic acid and/or a reaction product.

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