A system and method for authenticating a log-in request based on location using an authentication application. The authentication application includes a processing unit, a location module, an authentication module, a user interface engine, and a notification module. The processing unit receives a log-in request from a third party application. The processing unit also receives a location of the log-in request and a location of a registered user device. The location module computes a distance between the location of the log-in request and the location of the registered user device. The authentication module determines whether the computed distance exceeds a threshold. The authentication module authenticates the log-in request responsive to determining that the computed distance is within or less than the threshold. The authentication module denies authentication to the log-in request responsive to determining that the computed distance exceeds the threshold.