Patent ID: 9225700
Filing Date: 2015-12-29
Classification: H04L,H04W

Abstract:
1. A method performed by a client access device, the method comprising: sending an authentication request from the client access device to a client authorizing device; in response to sending the authentication request, receiving, at the client access device, a signal from the client authorizing device, the signal including an environmental detection instruction, the environmental detection instruction instructing the client access device to detect an aspect of a local environment, the environmental detection instruction having been received from a remote server by the client authorizing device in response to the client authorizing device forwarding the authentication request to the remote server; detecting, at the client access device, the aspect of the environment indicated by the environmental detection instruction to yield a first environmental detection result; sending the first environmental detection result from the client access device to the remote server; and in response to sending the environmental detection result to the remote server, receiving, at the client access device, a proximity signal from the remote server indicating whether or not proximity between the client access device and the client authorizing device has been established by comparing the first environmental detection result to a second environmental detection result sent from the client authorizing device to the server.