As the third information technology revolution after computers and the internet, the Internet of Things (IoT) has attracted much attention in modern technology. It has changed the traditional way of human-computer interaction (HCI), innovated interactions between machines and machines, and brought about historical changes. IoT technology has improved production efficiency and economic benefits and brought great convenience to people’s lives. Since its initial development, IoT technology has been applied in many fields and has the highest popularity and the broadest range of applications in the industrial field. Industrial IoT technology is an organic combination of industrial automation and IoT technology and is becoming increasingly widely used to monitor and manage production equipment, supply chain management, and industrial operations and maintenance. The application of industrial IoT fully integrates industrial production systems, industrial monitoring systems, and industrial management systems to both improve industrial efficiency and product quality during manufacturing and to effectively reduce management costs.

Given the broad application of industrial IoT technology in the industrial field, the information security of industrial IoT has become the focus of attention. Industrial control systems, networking equipment, and industrial cloud platforms are more vulnerable to intrusions under increasingly open network connections, causing system downtime, production interruptions, and asset losses. Therefore, it is particularly important to study information security protection technology in industrial IoT. Among various industrial IoT security protection technologies, secure software development methods should be followed, appropriate open-source software should be selected, and multi-level security protection methods should be constructed following the necessary industrial IoT levels. Firewalls can protect the entire industrial IoT system, and the various structural levels of the industrial IoT can be simultaneously defended through in-depth traffic inspection, communication authentication and encryption, and virus detection defence. At the current stage, information security technology involves IoT traffic analysis, communication protection, and equipment protection.

This Special Issue aims to provide opportunities and platforms for exchanges between academia and industry by discussing information security prevention and control technologies in the field of industrial IoT, and to highlight the importance of security protection technologies. We welcome both original research and review articles.

Potential topics include but are not limited to the following:

• IoT botnet virus detection
• Data traffic deep packet inspection
• Abnormal traffic monitoring of industrial IoT
• IoT data transmission encryption
• Security protection of industrial IoT equipment
• IoT firewall optimisation
• IoT security protection strategy design
• Industrial IoT port scanning
• Communication server access control
• Industrial IoT data processing
• IoT identity authentication
• Industrial IoT information cracking detection
• Optimisation of industrial IoT defence systems
• Industrial IoT virus detection
• Secure transmission of industrial IoT traffic