1## 9.14\. Automotive Vehicle System Isolation 2 3Android Automotive devices are expected to exchange data with critical vehicle 4subsystems by using the [vehicle HAL](http://source.android.com/devices/automotive.html) 5to send and receive messages over vehicle networks such as CAN bus. 6 7The data exchange can be secured by implementing security features below the 8Android framework layers to prevent malicious or unintentional interaction with 9these subsystems. 10