System and method for augmented reality gaming using a mobile device

A system for preventing a replay attack for a system in which a player uses a mobile device with an image capturing camera to become eligible for mobile promotions, wherein a replay attack occurs when an unscrupulous person captures multiple images of a promotion-win triggering event and submits the images as multiple entries, thereby attempting to earn multiple promotions for the same event, the system comprising:

• a promotion device comprising:
• (i) at least one display device;
• (ii) a plurality of input devices;
• (iii) at least one processor;
• and (iv) at least one memory device storing a program;
• a network that connects and enables communication between components in the system;
• a server connected to the network, the server including one or more server processors;
• a plurality of mobile devices, each mobile device comprising a device processor and enabling interaction with the server over the network;
• wherein the server receives event image data representing one or more images captured by a user's mobile device of a promotion-win triggering event associated with the promotion device, the occurrence of which entitles the user to a promotion;
• wherein the server compares an arrangement of indicia obtained from the captured one or more images of a promotion-win triggering event against possible arrangements of indicia for a same event to confirm that the captured one or more images represent different winning results;
• wherein the server compares the promotion-win triggering event image data to stored image data representing at least one promotional event entitled to a promotion;
• wherein the server compares a time and geographic location of a promotion-win triggering event against times and geographic locations of previously submitted promotion-win triggering events to confirm that the images represent a new promotion-win triggering event;
• and
• the server configured to award an entitlement to the promotion upon confirmation of new and unique promotion-win triggering events, and when a replay attack is not detected.