A secure client on smart phone to monitor automotive sensor network

This paper presents a proposal on design of a secure client on smart phone to monitor automotive sensor network. Recently, more and more vehicles, such as BMW X5, are connected from outside via smart phone[3]. From smart phone, users can use the internet resources in automotive. Also, from smart phone users can monitor the automotives. When the automotive is moving or stolen by robber, an alert information will be reported to users and users can even brake their automotive via smart phone in emergency status by sending control command to the vehicle information gateway. So a client software in smart phone is required to monitor the sensor network in automotives. And to prevent the client software is maliciously used by robbers, a security mechanism should be given for this client on the constraints of computation power, security level and power consumption. We proposed to encrypt all the messages in IDEA, which is with high security level and prone to implement in software and less demands on computation power. The critical data is suggested being stored in record management set, a mechanism based on Java MIDlet. And a communication transaction management is also proposed for SMS/MMS communication between the client software and its gateway. The verification of the key updating process is verified with model checking in UPPAAL[7].