System and method for detecting fraudulent transactions

Claim 1

A computer implemented system for detecting fraudulent transactions between a customer and a vendor, said computer comprising a memory and a processor coupled with said memory, said system comprising: a positive database comprising data representing a plurality of past non-fraudulent transactions known to said vendor; a negative database comprising data representing a plurality of past known fraudulent transactions; one or more transaction databases comprising consumer and geographic transaction information; a commodity database comprising data representing valuation and propensity to incite fraudulent activity for a plurality of commodities; transaction logic resident in said memory and operative to be executed by said processor to receive a transaction of a commodity from a vendor and decompose said transaction into a plurality of transaction parameters, said plurality of transaction parameters being characterized by an authenticity; result logic resident in said memory and operative to be executed by said processor to send an indication to said vendor whether said transaction is one of fraudulent and non-fraudulent; valuation logic resident in said memory and coupled with said transaction logic, said result logic and said commodity database and operative to be executed by said processor to compute the total value of said transaction and cause said result logic to indicate that said transaction is non-fraudulent if said total value is less than a first pre-determined threshold; comparison logic resident in said memory and coupled with said transaction logic, said result logic and said positive database and operative to be executed by said processor to compare said transaction with said positive database and cause said result logic to indicate that said transaction is non-fraudulent if said transaction matches at least one of said plurality of past non-fraudulent transactions in said positive database; and fraud logic resident in said memory and coupled with said transaction logic, said result logic and said negative database, said one or more transaction databases and said commodity database and operative to be executed by said processor to compute a first score as a function of said past fraudulent transactions and said propensity to incite fraudulent activity of said commodity, a second score as a function of said authenticity of said plurality of transaction parameters and a fraud score as a function of said first and second scores, said fraud logic being further operative to cause said result logic to indicate that said transaction is fraudulent if said fraud score exceeds a second pre-determined threshold.