Patent ID: 8655314

Claim:
One or more non-transitory computer-readable media having computer-executable instructions embodied thereon that, when executed, perform a method of detecting unauthorized use of telecommunication services that is attributable to an account, the method comprising: receiving location information that describes a location of a mobile device, which is authorized to use services attributable to the account; using the location information to quantify a measure of location uncertainty, which suggests a variability of the location information that was received, wherein the measure of location uncertainty is calculated based on a measure of Shannon entropy defined by H ⁡ ( A ) = - ∑ i = 1 m ⁢ ( k i / T ) ⁢ log 2 ⁡ ( k i / T ) ; and wherein k i is equal to a number of times the mobile device appeared at a particular location, and T is equal to a total number of appearances of the mobile device; upon receiving subsequent location information, applying differential analysis to assess an effect of the subsequent location information on the measure of Shannon entropy; and when the effect includes a change that exceeds a threshold, deeming that the subsequent location information describes another communication session of a different mobile device.