Abstract: The disclosure relates to a method performed by a within-vehicle-confirming system on-board a vehicle for establishing that a key device is within an interior of the vehicle. The system determines that there is a secure communication link between the vehicle and the key device. The system further provides a vehicle sound signal within the interior of the vehicle. Moreover, the system receives from the key device a key device signal via the secure communication link, which key device signal is derived from a sound signal detected by one or more sensors associated with the key device. The system further compares the vehicle sound signal with the key device signal, and enables a start of the vehicle when the key device signal matches the vehicle sound signal. The disclosure also relates to a within-vehicle-confirming system in accordance with the foregoing, and to a vehicle at least partly comprising such a system.

Abstract: A method performed by a vehicle of enabling access to the vehicle using a wireless communication device as a key includes advertising a random number required to access the vehicle, and receiving, from the wireless communication device approaching the vehicle, a request to access the vehicle, the request including authentication data, a signature of the wireless communication device, and booking data required to access the vehicle. The method also includes determining that the received authentication data matches the advertised random number, and verifying correctness of the signature of the wireless communication device in response to determining that the received authentication data matches the advertised random number. The method also includes determining that the booking data is valid in response to verifying correctness of the signature of the wireless communication device, and allowing access to the vehicle in response to determining that the booking data is valid.

Abstract: The disclosure relates to a method performed by a within-vehicle-confirming system on-board a vehicle for establishing that a key device is within an interior of the vehicle. The system determines that there is a secure communication link between the vehicle and the key device. The system further provides a vehicle sound signal within the interior of the vehicle. Moreover, the system receives from the key device a key device signal via the secure communication link, which key device signal is derived from a sound signal detected by one or more sensors associated with the key device. The system further compares the vehicle sound signal with the key device signal, and enables a start of the vehicle when the key device signal matches the vehicle sound signal. The disclosure also relates to a within-vehicle-confirming system in accordance with the foregoing, and to a vehicle at least partly comprising such a system.