Patent ID: 8737607

Claim:
A method in one or more servers communicatively coupled to a wireless communication network in which a first portable device and a second portable device operate, the method comprising: electronically receiving, at the one or more servers, a first secure location indicator from the first portable computing device, wherein the first secure location indicator is generated using a location of the first portable computing device, and wherein the first secure location indicator does not reveal the location of the first portable computing device to the one or more servers; electronically receiving, at the one or more servers, a second secure location indicator from the second portable computing device, wherein the second secure location indicator is generated using a location of the second portable computing device, and wherein the second secure location indicator does not reveal the location of the second portable computing device to the one or more servers; comparing the first secure location indicator to the second secure location indicator; and in response to determining that the first secure location indicator is identical to the second secure location indicator, causing an indication of physical proximity of the second portable computing device to be electronically transmitted to the first portable computing device.