System and Method for Proximity Detection

A proximity detection system comprising:

• a plurality of target mobile devices capable of a wireless short range data communication protocol;
• each of said target devices having a unique associated digital identity value;
• each of said target devices being associated with a location;
• at least one roving mobile device capable of a wireless short range data communication protocol;
• said roving mobile device capable of detecting said target device unique associated digital identity values;
• said roving mobile device capable of long distance wireless data communication;
• a central server computer capable of data communication with said roving mobile device;
• said central server computer hosting a data processing system which accepts as input sets of said detected target device identity values from said roving mobile device;
• said central computer hosting a database of values corresponding to selected locations and associated said target device identities;
• said central server computer hosting a data processing program which computes the probability of said roving device proximity to said selected location by processing the input sets of detected target device identities by an algorithm which utilizes said database;
• said central server program capable of notifying selected devices of roving device proximity to said location.