Patent ID: 8588814
Filing Date: 2013-11-19
Classification: G01C,H04L,H04M,H04W

Abstract:
1. A mobile device comprising: global positioning system (GPS) receiver circuitry that, during operation, determines a location of the mobile device; client software that, during operation, interacts with the GPS receiver circuitry and activates navigation towards a destination; the client software receiving, from a second mobile device, information identifying the location of the second mobile device as the destination and a request to the client software to navigate to the destination; the client software accepting the request; the client software, responsive to receiving the request, automatically navigating to the second mobile device and providing directions to the destination to the user of the mobile device; the client software automatically sending at least one notification to the second mobile device when the client software determines that the mobile device has moved to within a certain distance of the second mobile device while traveling to the location of the second mobile device; wherein the mobile device receives a challenge in response to the at least one notification, and in response to the challenge, sends security information and an associated GPS coordinate to the sender of the challenge to enable verification that the mobile device has successfully reached the destination; and wherein the security information comprises one or more of a digital signature computed and sent, a passcode entered by a corresponding user, coupon information, and a membership identification.