Patent ID: 8441367

Claim:
An apparatus for alerting one or more users to the proximity of an unusually located user, the apparatus comprising: a memory operative to store a geographic location history for a first user, the geographic location history comprising a plurality of geographic locations, wherein each geographic location is associated with at least one time segment; and a processor in communication with the memory, the processor being operative to: determine a confidence value for each of the geographic locations of the plurality of geographic locations stored in the memory, wherein each confidence value for each of the geographic locations represents the likelihood of the first user being at the corresponding geographic location; receive a current geographic location of the first user; retrieve a corresponding confidence value for the received current geographic location of the first user; determine that the current geographic location of the user is unusual based on the comparison of the retrieved corresponding confidence value with a threshold confidence value; and transmit an alert to a second user in proximity to the first user when the processor determines that the current geographic location of the first user is unusual.