Patent ID: 8260316

Claim:
A movement distance falsification preventing system for a system in which points are added according to a movement distance of a user owning a portable terminal, the movement distance falsification preventing system, comprising: a position information acquisition unit which acquires position information of the portable terminal; a time information acquisition unit which acquires time information; a movement distance calculation unit which successively acquires position information from the position information acquisition unit for each predetermined time interval on the basis of the time information obtained from the time information acquisition unit and calculates a movement distance; and a determination unit which determines whether the calculated movement distance is within a range allowed for a transportation mode assumed on the basis of the position information, the time information, and the calculated movement distance, wherein when the determination unit determines that the calculated movement distance is not within the range allowed for any of the transportation modes, the determination unit determines that the movement distance is improper, and wherein the determination unit detects whether or not same or close values of a parameter to be added to the position information obtained from the position information acquisition unit appear repeatedly for every predetermined number of information acquisitions, and determines that the movement distance is improper when the repeated appearance of same or close values has been detected.