Patent ID: 8463237
Filing Date: 2013-06-11
Classification: H04M

Abstract:
1. Non-transitory computer-readable media storing computer-executable instructions that, when executed, perform a method of detecting mobile-device-account fraud, the method comprising: receiving communication records describing a set of communication instances of a mobile device, wherein each communication record includes a respective time instant; calculating an average instance-gap duration between consecutive communication instances in the set of communication instances, wherein an instance-gap duration includes a duration of time that passes between a time instant of a communication instance and a subsequent time instant of a consecutive ensuing communication instance; and prompting an unauthorized-use response based on the average instance-gap duration being below an instance-gap threshold, wherein the instance-gap threshold is determined by calculating a multi-user average instance-gap duration that averages instance-gap durations across a plurality of users and wherein the instance-gap threshold is a number of standard deviations below the multi-user average instance-gap duration.