A Method For Authenticating Use Of An Activity Tracking Device

A data processor implemented method for authenticating use of an activity tracking device by a user is provided. The method includes obtaining a plurality of first markers, wherein each of the first markers includes a location and time-stamp of the activity tracking device when the activity tracking device is tracking at least one parameter of the user. The method also includes obtaining a plurality of second markers from a transaction data storage, wherein each of the second markers includes a location and time-stamp of an electronic transaction made by the user using at least one payment device of the user. The method further includes comparing the locations of the plurality of first markers with the locations of the plurality of second markers, and determining, based on the comparison, whether the activity tracking device is regularly in use by the user.