Online Fraud Detection Dynamic Scoring Aggregation Systems and Methods
First Claim
1. A method comprising:
- employing a computer system to determine an aggregate fraud score of a target document as a combination of a first fraud score and a second fraud score of the target document, wherein the first and second fraud scores are determined according to distinct fraud-evaluation procedures;
employing the computer system to determine a third fraud score of the target document;
in response to determining the third fraud score, employing the computer system to modify the aggregate fraud score by a first amount determined according to a product of the third fraud score and a difference between the aggregate score and a maximum allowable aggregate score; and
in response to modifying the aggregate fraud score, employing the computer system to determine whether the target document is fraudulent according to the modified aggregate score.
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Accused Products
Abstract
In some embodiments, an online fraud prevention system combines the output of several distinct fraud filters, to produce an aggregate score indicative of the likelihood that a surveyed target document (e.g. webpage, email) is fraudulent. Newly implemented fraud filters can be incorporated and ageing fraud filters can be phased out without the need to recalculate individual scores or to renormalize the aggregate fraud score. Every time the output of an individual filter is calculated, the aggregate score is updated in a manner which ensures the aggregate score remains within predetermined bounds defined by a minimum allowable score and a maximum allowable score (e.g., 0 to 100).
51 Citations
27 Claims
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1. A method comprising:
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employing a computer system to determine an aggregate fraud score of a target document as a combination of a first fraud score and a second fraud score of the target document, wherein the first and second fraud scores are determined according to distinct fraud-evaluation procedures; employing the computer system to determine a third fraud score of the target document; in response to determining the third fraud score, employing the computer system to modify the aggregate fraud score by a first amount determined according to a product of the third fraud score and a difference between the aggregate score and a maximum allowable aggregate score; and in response to modifying the aggregate fraud score, employing the computer system to determine whether the target document is fraudulent according to the modified aggregate score. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A computer system comprising at least a processor programmed to:
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determine an aggregate fraud score of a target document as a combination of a first fraud score and a second fraud score of the target document, wherein the first and second fraud scores are determined according to distinct fraud-evaluation procedures; determine a third fraud score of the target document; in response to determining the third fraud score, modify the aggregate fraud score by a first amount determined according to a product of the third fraud score and a difference between the aggregate score and a maximum allowable aggregate score; and in response to modifying the aggregate fraud score, determine whether the target document is fraudulent according to the modified aggregate score. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method comprising:
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employing a computer system to determine whether a target document comprises a fraud-indicative feature; in response to determining whether the target document comprises the target-indicative feature, when the target document comprises the fraud-indicative feature, employing the computer system to modify a current value of an aggregate fraud score for the target document by an amount proportional to a difference between the current value of the aggregate score and a maximum allowable value of the aggregate fraud score, wherein the aggregate score is determined as a combination of a plurality of individual fraud scores; and in response to modifying the current value of the aggregate fraud score, employing the computer system to determine whether the electronic document is fraudulent according to the modified current value of the aggregate fraud score.
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Specification