Abstract

In the Internet of Things (IoT) paradigm, boundless solutions have been designed and implemented to do effective and secure communication among it’s smart objects and it’s network. The outcome of effective and secure communication always relies on which IoT protocol has been used at the application layer. Generally IoT devices communicates using various IoT push protocols such as XMPP (Extensible Messaging and Presence Protocol), MQTT (Message Queuing Telemetry Transport), AMQP (Advanced Message Queuing Protocol) among which MQTT protocol is widely used protocol within IoT platform because it requires nominal resources as it’s lightweight and efficient, it also support bi-directional communication among smart objects and cloud and MQTT also guarantees and support reliable message delivery through 3 Quality of Service (QoS) levels. This research paper focuses on key concepts on MQTT protocol architecture, basic security fundamentals such as identity, authentication, authorization and MQTT advance security fundamentals which includes X.509 client certification authentication, OAuth 2.0 and payload encryption.

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