MQTTSec Based on Context-Aware Cryptographic Selection Algorithm (CASA) for Resource-Constrained IoT Devices

With the spread and wide adoption of IoT systems, new security and privacy concerns started to arise and be presented as serious issues. To mitigate these new threats, new countermeasures and prevention techniques based on cryptography are introduced. Since most IoT devices are restrained with the sparse availability of resources, such as memory and computational power, using traditional cryptographic algorithms is not practical as it needs special hardware implementation to accommodate these algorithms. In this work an enhancement of the traditional MQTT protocol called MQTTSec is proposed. MQTTSec allows communicating devices to select the appropriate cryptographic technique based on the available resources. A validation of the proposed technique is also provided.