Authenticating messages sent between a vehicle and a central facility
AssigneeGeneral Motors Corporation
InventorsKi Hak Yi, Kenneth L. Peirce, Andrew J. MacDonald, Sethu K. Madhavan
Life of this patent
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Abstract
A system and method for transmitting short message service (SMS) messages between a vehicle and a central facility includes determining an authentication tone having a unique characteristic, generating an SMS message that includes computer-readable data representing the authentication tone; sending the SMS message to a central facility, establishing a call between the central facility and the vehicle using a vehicle telematics unit and a wireless carrier system, generating the determined authentication tone at the vehicle, and transmitting the generated authentication tone over the established call to the central facility.
Claims20
A method of transmitting short message service (SMS) messages between a vehicle and a central facility, comprising the steps of:
- (a) determining an authentication tone having a unique characteristic;
- (b) generating an SMS message that includes computer-readable data representing the authentication tone;
- (c) sending the SMS message to a central facility;
- (d) establishing a call between the central facility and the vehicle using a vehicle telematics unit and a wireless carrier system;
- (e) generating the determined authentication tone at the vehicle;
- and
- (f) transmitting the generated authentication tone over the established call to the central facility.
A method of transmitting short message service (SMS) messages between a vehicle and a central facility, comprising the steps of:
- (a) receiving at a central facility an SMS message that is sent from one of a plurality of vehicles and that includes computer-readable data representing an authentication tone having a unique characteristic;
- (b) receiving a call from one of the vehicles at the central facility via a wireless carrier system;
- (c) detecting an authentication tone that is transmitted via the received call from one of the vehicles;
- (d) comparing the detected authentication tone with the computer-readable data representing the authentication tone that is included with the SMS messages;
- and
- (e) validating the SMS message if the detected authentication tone matches the computer-readable data.
A method of transmitting short message service (SMS) messages between a vehicle and a central facility, comprising the steps of:
- (a) specifying at a vehicle an authentication tone having a randomly-chosen frequency, a number of tone pulses, and a time delay between each tone pulse;
- (b) generating an SMS message that includes computer-readable data representing the randomly-chosen frequency, the number of tone pulses, and the time delay;
- (c) sending the SMS message from the vehicle to a central facility via a wireless carrier system;
- (d) establishing a call between the vehicle and the central facility via the wireless carrier system;
- (e) transmitting the authentication tone from the vehicle to the central facility using the established call;
- (f) detecting the frequency of the authentication tone, the number of tone pulses, and the time delay between each tone pulse received at the central facility;
- (g) comparing the results of step (f) with the computer-readable data of the SMS message;
- and
- (h) validating the SMS message if the computer-readable data matches the results of step (f).
Dependencies are inferred from the claim text.