Patent ID: 8051292
Filing Date: 2011-11-01
Classification: G06F,H04L,H04W

Abstract:
1. A method for determining proximity between a first device and a second device, the method comprising: providing a first device storing a first device private key, the first device having an associated secure first device certificate storing secured information, the secured information comprising: providing a second device storing a second device private key, the second device having an associated secure second device certificate storing secured information, the secured information comprising: providing a copy of the second device certificate to the first device; establishing a secure authenticated channel between the first device and the second device; sending a first proximity challenge from the first device to the second device, the proximity challenge including a numeric challenge value; receiving the first proximity challenge at the second device, processing the proximity challenge at the second device to produce a response to the first proximity challenge, and sending the response to the first proximity challenge from the second device to the first device; receiving the response to the first proximity challenge at the first device; and performing the following at the first device: