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Identification and management of fraudulent credit/debit card purchases at merchant ecommerce sites

  • US 8,065,233 B2
  • Filed: 07/26/2007
  • Issued: 11/22/2011
  • Est. Priority Date: 04/06/2000
  • Status: Expired due to Term
First Claim
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1. A computer implemented method for processing an online transaction, the method being implemented by one or more programmed electronic computer systems and comprising:

  • generating, by at least one programmed electronic computer system, from an online transaction of a purchaser, a plurality of keys from key fields of the transaction that individually do not reliably identify the purchaser;

    for each key, retrieving, by at least one programmed electronic computer system, a profile of historical transactions associated with the key;

    weighting, by at least one programmed electronic computer system, each profile with a weight indicating a degree to which the profile is associated with current purchaser;

    generating a contrast measure using at least two of the profiles;

    generating, by at least one programmed electronic computer system, a fraud score indicative of the likelihood of fraud in the online transaction by using the contrast measure, the weighted profiles, and the current transaction; and

    further processing the online transaction based on the generated fraud score.

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