METHOD AND APPARATUS FOR EVALUATING FRAUD RISK IN AN ELECTRONIC COMMERCE TRANSACTION
First Claim
1. A method comprising:
- generating and storing two or more fraud risk mathematical models;
receiving information about a transaction;
for each fraud risk mathematical model of the two or more fraud risk mathematical models, applying at least the information about the transaction to said each fraud risk mathematical model, said each fraud risk mathematical model producing a corresponding raw score;
transforming the corresponding raw score into a corresponding risk estimate for said each fraud risk mathematical model;
blending the corresponding risk estimate of said each fraud risk mathematical model into a single fraud score for the transaction by determining a plurality of pair-wise fusion proportion values for the two or more fraud risk mathematical models;
combining the corresponding risk estimate of said each fraud risk mathematical model according to a ratio specified by the pair-wise fusion proportion values.
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Abstract
Transaction information is received and applied to multiple fraud risk mathematical models that each produce a respective raw score, which are transformed with respective sigmoidal transform functions to produce optimized likelihood of fraud risk estimates to provide to a merchant. Respective fraud risk estimates are combined using fusion proportions associated with the respective risk estimates, producing a single point risk estimate, which is transformed with a sigmoidal function to produce an optimized single point risk estimate. The sigmoidal functions approximate a relationship between risk estimates produced by fraud risk detection models and a percentage of transactions associated with respective risk estimates; the relationship is represented in terms of real-world distributions of fraudulent and non-fraudulent transaction.
156 Citations
18 Claims
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1. A method comprising:
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generating and storing two or more fraud risk mathematical models; receiving information about a transaction; for each fraud risk mathematical model of the two or more fraud risk mathematical models, applying at least the information about the transaction to said each fraud risk mathematical model, said each fraud risk mathematical model producing a corresponding raw score; transforming the corresponding raw score into a corresponding risk estimate for said each fraud risk mathematical model; blending the corresponding risk estimate of said each fraud risk mathematical model into a single fraud score for the transaction by determining a plurality of pair-wise fusion proportion values for the two or more fraud risk mathematical models;
combining the corresponding risk estimate of said each fraud risk mathematical model according to a ratio specified by the pair-wise fusion proportion values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A computer-readable medium encoded with one or more sequences of instructions which when executed by one or more processors cause performing:
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generating and storing two or more fraud risk mathematical models; receiving information about a transaction; for each fraud risk mathematical model of the two or more fraud risk mathematical models, applying at least the information about the transaction to said each fraud risk mathematical model, said each fraud risk mathematical model producing a corresponding raw score; transforming the corresponding raw score into a corresponding risk estimate for said each fraud risk mathematical model; blending the corresponding risk estimate of said each fraud risk mathematical model into a single fraud score for the transaction by determining a plurality of pair-wise fusion proportion values for the two or more fraud risk mathematical models;
combining the corresponding risk estimate of said each fraud risk mathematical model according to a ratio specified by the pair-wise fusion proportion values. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification