Mitigating DoS attacks in publish-subscribe IoT networks

Internet of Things (IoT) is an emerging subject which enables multiple applications and requires robust security solutions. IoT architectures contribute to critical aspects of our society like transportation, health-care, industry, telecommunications and many others. Security is difficult to be implemented in the IoT context because the embedded devices are resource constrained and deployed in uncontrolled areas, thus being targeted by various security attacks. In scenarios like smart city, IoT networks are populated by both trusted and untrusted transient devices, thus mechanisms for mitigating complex security attacks must be implemented. Embedded networks with near real-time constraints are subject to denial-of-service attacks which can easily affect the applications availability by injecting malicious packets into the network. This paper proposes a lightweight security mechanism which addresses DoS attacks in IoT publish-subscribe applications.