Design of dual authentication algorithm for Modbus protocol

ZHANG Yupeng1, WEN Mi2

1. 1.School of Automation Engineering, Shanghai University of Electric Power, Shanghai 200090, China
2.School of Computer Science and Technology, Shanghai University of Electric Power, Shanghai 200090, China
• Online:2018-10-15 Published:2018-10-19

针对Modbus协议的双重认证算法设计

1. 1.上海电力学院 自动化工程学院，上海 200090
2.上海电力学院 计算机科学与技术学院，上海 200090

Abstract: With the development of modern industrial networks, more and more security problems appear. The Modbus protocol application is widely used in the industrial control network. However, the Modbus protocol is not secure, thus, it is vulnerable to malicious attacks. As far as is known there is no effective solution till now. In order to solve these security problems, this paper presents a dual authentication model, algorithm and configuration scheme for master and slave devices of Modbus based industrial network. The algorithm utilizes some features of Hash chain and symmetric encryption, and it is a lightweight authentication algorithm designed for the limited computing and storage capacity of Modbus based remote control system. The security analysis shows that the authentication algorithm can effectively resist the security problems of the common Modbus based industrial control network, and the algorithm configuration scheme can effectively reduce the interference of the authentication algorithm to the master and slave devices.