Secure wireless lock-actuation exchange

A method for secure wireless lock-actuation exchange, the method comprising:

• transmitting, by a device, a request to a vehicle to actuate a lock of the vehicle, the request including an identifier for the vehicle;
• and
• performing a loop of verification iteration responses, a verification iterations response including:
• receiving a response from the vehicle to a last transmission from the device, the response including;
• a vehicle signature created by the vehicle from the identifier and a freshness value;
• and
• the freshness value;
• verifying the freshness value;
• creating a verification vehicle signature based on a key stored in the device, the verified freshness value, and the first vehicle signature;
• and
• transmitting the verification vehicle signature to the vehicle, wherein the loop exits when a new vehicle signature is not received from the vehicle.

A non-transitory machine-readable medium including instructions for a secure wireless lock-actuation exchange, the instructions, when execute, cause circuitry of a device to perform operations comprising:

• transmitting a request to a vehicle to actuate a lock of the vehicle, the request including an identifier for the vehicle;
• and
• performing a loop of verification iteration responses, a verification iterations response including:
• receiving a response from the vehicle to a last transmission from the device, the response including:
• a vehicle signature created by the vehicle from the identifier and a freshness value;
• and
• the freshness value;
• verifying the freshness value;
• creating a verification vehicle signature based on a key stored in the device, the verified freshness value, and the first vehicle signature;
• and
• transmitting the verification vehicle signature to the vehicle, wherein the loop exits when a new first vehicle signature is not received from the vehicle.