| 摘要 |
An exemplary method for determining a potentially fraudulent transaction includes receiving present card location information indicating a present location and a present time for a financial transaction card and a first transaction, obtaining past card location information indicating a past location and a past time for the financial transaction card and a second transaction, calculating a distance between the present location and the past location, calculating a time duration based on the present time and the past time, determining feasibility of use of the financial transaction card at the present location and the past location based on the distance and the time duration, and generating a transaction risk alert if the feasibility determination is lower than a predetermined threshold.
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