Security for IoT: An effective DTLS with public certificates

The IoT (Internet of Things) is a scenario in which things, people, animal or any other object can be identified uniquely and have the ability to send or receive data over a network. With the IPV6 the address space has been increased enormously, favors allocation of IP address to a wide range of objects. In near future the number of things that would be connected to internet will be around 40 million. In this scenario it is expected that it will play a very vital role in business, data and social processes in which devices will interact among themselves and with the surrounding by interchanging information [5]. If this information carries sensitive data then security is an aspect that can never be ignored. This paper discusses some existing security mechanism for IoT and an effective DTLS mechanism that makes the DTLS security more robust by employing public certificates for authentication. We can use a Certificate authority that can give the digital certificates to both the client and server and can increase the effectiveness of this communication. This work aims to introduce a CA for the communication and to provide some results that can show its improved performance in contrast to the pre-shared key communication.