Digital car key scheme based on BLE SIM card

Abstract

The digital car key is available on smart devices now. People no longer have to bring the key fob to unlock and start the engine. The existing schemes have some problems, such as poor device compatibility and poor user experience. In this paper, we proposed an unperceived digital car key scheme based on Bluetooth Low Energy (BLE) SIM card. After owner paring, the vehicle automatically locks/unlocks when the terminal device with the BLE SIM card approaches/leaves it. The data of the digital car key is stored in the secure element of the Bluetooth SIM card. The digital credentials are exchanged and mutually authenticated through a Bluetooth connection between the vehicle and the BLE SIM card. Compared to the existing schemes, our scheme has better device compatibility and a better user experience.