An Automatic Key-update Mechanism for M2M Communication and IoT Security Enhancement

An Internet-of-Things (IoT) system is generally composed of endpoint clients, network devices, and cloud servers. As such, data transfers in the network are full of security concerns. Besides, coming booming IoT applications will accelerate the network infrastructure to provide timely and safe information exchange services. Existing network could have a shortcoming of static key authentication. To enable an automatic key-update mechanism for IoT devices to enhance security in Machine-toĮMachine (M2M) communications, we implemented a lightweight key-update mechanism based on the libcoap library. Experimental results show that just 1.03% latency overhead is added for a better security performance.