Data Exchange Protocol for Cryptographic Key Distribution System Using MQTT Service

There is an increasing demand for capturing reliable data from IoT network devices. Due to the limited capabilities of such devices to process and store sensitive data and the range and performance of the communication link, it is a significant challenge to develop a secure solution for symmetric key distribution. This paper presents a secure data exchange protocol for a cryptographic key generation, renewal, and distribution (KGR) system. The Trusted Platform Module (TPM) supports the trust establishment, key generation, all cryptographic procedures of the KGR system and secure data exchange in the described protocol. The protocol uses the MQTT (Message Queuing Telemetry Transport) service, which IoT devices widely use.