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Product information protecting method and system

  • US 7,689,479 B2
  • Filed: 11/29/2005
  • Issued: 03/30/2010
  • Est. Priority Date: 12/06/2004
  • Status: Expired due to Fees
First Claim
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1. A method for protecting product information about one or more selected products attached to one of a plurality of tags, comprising the steps of:

  • receiving the product information for identifying the product stored in one of the plurality of tags attached to one or more selected products;

    generating a local identifier in accordance with a predetermined rule according to the reception of the product information;

    creating a lock for the product information stored in the one of the plurality of tags;

    sending the product information corresponding to the local identifier, in order to store the product information in a product information recording medium isolated from the one of the plurality of tags;

    generating a receipt identifier for identifying the product information recording medium;

    encrypting the receipt identifier without compression of the receipt identifier, with the encryption of the receipt identifier specific to the product information recording medium;

    generating the passcode for the one of the plurality of tags based on the encryption of the receipt identifier;

    storing the passcode on the product information recording medium;

    sending the local identifier to the one of the plurality of tags, in order to replace the product information with the corresponding local identifier, wherein the local identifier is a sequential number;

    assigning each of a plurality of pieces of the product information a separate instance of the sequential number;

    generating a replacement lock for the product information stored in the one of the plurality of tags after replacing the product information with the sequential number;

    generating a replacement passcode for the one of the plurality of tags based on the receipt identifier;

    determining whether there is product information to be restored by comparing a first received passcode to a second passcode stored in the product information recording medium;

    restoring the product information to the one of the plurality of tags in place of the sequential number;

    applying a write protection lock to the one of the plurality of tags after the product information is restored;

    controlling repetition of the sequential number with a repetition controller, wherein the sequential number is unique within the product information but not unique to a product; and

    determining whether the number of selected products is greater than the sequential number.

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