IoT security approach based random distribution of communication frequency.

IoT is a technology that can be found everywhere in our daily lives. The bulk of Internet of Things (IoT) technologies relies on wireless transmissions; however, these are often subjected to security threats such as communication intercepts. The aims of this paper is to address these threats by suggesting a method based on a random distribution of communication frequencies. The proposed approach was tested using LoRa technology within an experimental testbed. The validation results show that randomly changing communication frequencies introduce a processing delay of less than one second during transmission and reception. Furthermore, the experiments showed that the proposed strategy enhances coexistence with other LoRa devices. The performance achieved is promising for secure and efficient data transmission applications.•The concentrate on the vulnerabilities that arise in the network of IoT systems at the physical layer•We propose a method to close this security gap by using a random allocation of communication frequency between LoRa cards.•The results show that the coexistence between IoT is possible and the random allocation of communication frequencies introduced less than a second in transmission and reception of packets.