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Method for authenticating objects identified by images or other identifying information

  • US 5,351,302 A
  • Filed: 05/26/1993
  • Issued: 09/27/1994
  • Est. Priority Date: 05/26/1993
  • Status: Expired due to Term
First Claim
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1. A method for authenticating an object identified by a data string, the data string including a digitized image of the object, comprising the steps of:

  • generating a signature of the data string using a private key of a public-key cryptosystem pair, the public-key cryptosystem pair also having a public key M;

    decrypting the signature using the public key M of the public-key cryptosystem pair; and

    comparing the decrypted signature with the digitized image to thereby authenticate the object.

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