An Implementation of Convergence Security Solution for Overcoming of Security Vulnerabilities in Industrial Control Communication Network

摘要

As ICT has been introduced into the traditional industrial field and the convergence industry environment has been developed, the industrial devices operated as closed networks are exposed to external networks, resulting in increased security vulnerability. If ICT networks with open and bi-directional features control industrial devices using unprotected industrial protocols, the physical and economic damage will increase rapidly. General Internet security equipment can be applied, but it is impossible to completely block security threats. In this paper, we analyze security flaws in ICT convergence industry control network and propose security technology to overcome these vulnerabilities. In addition, the convergence industry security gateway system has been developed by applying DPI Filtering Technology, Self-Similarity Technology, OPC-UA Protocol Gateway Technology and Unidirectional Communication Technology proposed in this paper. This system can be applied to the ICT convergence industry to improve the overall security level, and it is expected that the stability of ICT convergence products and services, which cover a wide range of household devices including automobiles and TVs. Future research will develop an industrial standard protocol conversion technology such as MQTT in addition to OPC-UA, and improve the processing performance and bandwidth of the system.