Patent ID: 7457418
Filing Date: 2008-11-25
Classification: G07B,G07C

Abstract:
1. A method, comprising: transmitting, by a first transmitter, an inquiry from a mobile device of a user to a key authority via a wide area transmission network in order to obtain an access key for accessing functions of a user operable device having limited accessibility, the key authority verifying said inquiry, said key authority assigning said access key if the inquiry is validated, said key authority transmitting said access key via the wide area transmission network to said mobile device, the mobile device storing said access key in said mobile device, transmitting, by a second transmitter, said access key via a short range communication network from said mobile device to a controller unit controlling said user operable device, the controller unit generating a validation key, the controller unit validating said access key by comparing said access key with said validation key, and the controller unit granting said user access to said functions of said user operable device if the access key is valid, wherein said transmitting and verifying said inquiry comprises several transmissions and retransmissions, including a request to operate said user operable device, a response by the key authority, the response being a response to said request to operate said user operable device and a request for information, and a transmission of requested information to the key authority, wherein said information is used by the key authority for co-coding the access key with one or more conditions for operating the user operable device.