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Research Topics in Lightweight Authentication for MQTT Protocol

Research Topics in Lightweight Authentication for MQTT Protocol

   The authentication mechanisms depict the trust level of the communicating entities through authentication certificates and key pairs. There are several authentication schemes proposed for various wireless network scenarios which are not straightly applicable to the MQTT environment. The resource-limited nature and device heterogeneity make the design of IoT authentication protocols a complex task. Device authentication is one of the main concerns in MQTT security over IoT applications. The reason is that the open and unprotected MQTT servers create security vulnerabilities that allow hackers to read the messages during transfer. Hence, it requires the best security solution suitable for resource-limited IoT.

   Most IoT devices are restricted in resource and power consumption, so it is not easy to design and implement robust authentication mechanisms for MQTT. The lightweight authentication mechanisms are widely suggested for IoT environments due to their simplicity and less computing power. The lightweight authentication models utilize certificates and shortest key pairs to establish secure communication among the devices. The lightweight authentication models are most powerful in the MQTT environment compared with classical authentication schemes. However, authentication-based is a challenging task in the IoT environment, as the open wireless characteristics, resource-limited nature, and heterogeneous environment are highly vulnerable to novel attacks.