Patent ID: 7929959
Filing Date: 2011-04-19
Classification: H04B,H04W

Abstract:
1. A machine-implemented method of activating a mobile device, the method comprising: issuing from a mobile device having a currently inserted SIM card an activation request, the activation request comprising data that uniquely identifies the device and data that uniquely identifies the currently inserted SIM card; storing in the mobile device a signed activation record comprising the device data and the SIM card data, the activation record having been generated and signed by an activation server responding to the activation request; verifying the activation record against the currently inserted SIM card, wherein verifying the activation record stored in the device further comprises decrypting a content of the activation record using a device obfuscation key that is derived from a hardware thumbprint of the device and a shared obfuscation key; and registering the device with a communications network after successfully verifying the activation record.