Patent ID: 11932197
Assignee: TOYOTA MOTOR NORTH AMERICA, INC.
Field: Control (Instruments)
Classification: CPC B  G | IPC B  G

Claim 1:
2. A method comprising:
determining, by an authentication system of a vehicle, a threshold response time for a wireless communications device to process a challenge field;
sending, by the authentication system, the challenge field to the wireless communications device;
receiving, by the authentication system, a response to the challenge field from the wireless communications device within a response time; and
authenticating, by the authentication system, the wireless communications device based on the response time being less than the threshold response time;
wherein determining the threshold response time comprises:
determining, by the authentication system, a benchmark response time for the wireless communications device to respond to the challenge field based on one or more conditions of the wireless communications device; and
setting the threshold response time to the benchmark response time; and
wherein determining the benchmark response time is based on a series of receptions of challenges and transmissions of responses under varying load conditions of a processor of the wireless communications device.