Patent ID: 8429731
Filing Date: 2013-04-23
Classification: G07C,H04W

Abstract:
1. A method for reactivating a telematics device configured to make a data call via a roaming partner of a service provider, the service provider having an authentication bypass feature which uses an authentication bypass key common to the telematics device and the service provider to allow the telematics device to make a data call through the roaming partner without authentication, the method comprising: setting the authentication bypass key on a server of the service provider equal to a previous authentication bypass key, wherein the previous authentication bypass key was used by the authentication bypass feature prior to deactivation of the telematics device; setting the authentication bypass key on the telematics device equal to the previous authentication bypass key; commencing the data call through the roaming partner by sending the authentication bypass key to the service provider from the telematics device via the roaming partner, wherein the previous authentication bypass key is an initial authentication bypass key known to the telematics device and the service provider prior to initial activation of the telematics device; the initial authentication bypass key is determined prior to activation of the telematics device by: calculating a checksum using a checksum function that receives an A-key of the telematics device as input; concatenating the checksum to the A-key of the telematics device; and hashing the result of said concatenating using a hash function; wherein said initial authentication bypass key is an output of said hash function.