Accountability in Internet of Things Networks

With the rapid development of communication and Internet technologies, the Internet of Things (IoT) has become increasingly popular. Although IoT devices can bring more benefits to humans, there are a lot of concerns about the security and privacy of the IoT devices. Even though researchers propose some prevention and detection methods for security purposes, cyber-attacks often happen in IoT devices. Thus, we should have an accountability mechanism for the IoT devices. We should know what happens once the IoT devices have security and privacy issues. In this article, we propose an IoT system that can provide accountability. The proposed IoT system can guarantee that the communication behaviors of IoT devices and the local server can be observed and audited. IoT devices and the local server cannot record incorrect messages, deny that messages were sent out, and forge log entries without notice. We prove our proposed IoT system's accountability property and evaluate its performance.