Pay-per-click system and method that determine whether a requested link to a merchant website is legitimate or fraudulent

  • US 7,249,104 B2
  • Filed: 02/07/2003
  • Issued: 07/24/2007
  • Est. Priority Date: 02/07/2003
  • Status: Expired due to Fees
First Claim
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1. In a pay-per-click system including a search engine to list merchant websites in an order according to incremental compensation for click-through to the websites, a method for determining whether a click on a link is legitimate or fraudulent, the method comprising:

  • generating on a side of the search engine a code to associate with a user of the search engine who clicks on one of the merchant websites, the code uniquely identifying a device being used by the user;

    returning the code to the device;

    generating another code when the one of the merchant websites is clicked again by the user from the device;

    concatenating the another code to the code previously generated; and

    determining whether the requested link to the merchant website is legitimate or fraudulent by examining a duration between two visits to the one of the merchant websites in the code.

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