KEY INFORMATION MANAGEMENT DEVICE, KEY INFORMATION MANAGEMENT METHOD, AND NON-TRANSITORY COMPUTER-READABLE RECORDING MEDIUM

A key information management device includes an information processing device. The information processing device is configured to deliver key information to a mobile terminal as the mobile terminal transmits a predetermined transmission signal toward a vehicle. The key information is information for unlocking the vehicle, starting the vehicle, or unlocking and starting the vehicle. The information processing device is configured to register permission for a user of the vehicle to use a predetermined service using the vehicle. The permission is permission to cause the information processing device to deliver the key information to a mobile terminal of a third party concerned with the predetermined service, other than the user of the vehicle.