The rapid development of internet of things (IoT) is to be the next generation of the IoT devices are a simple target for attackers due to the lack of security. Attackers can easily hack the IoT devices that can be used to form botnets, which can be used to launch distributed How to cite this article: Mubarakali A, Srinivasan K, Mukhalid R, Jaganathan SCB, Marina N. Security challenges in internet of things: Distributed denial of service attack detection using support vector machine-based expert systems.