A security solution for Modbus TCP protocol to prevent attacks on SCADA system using this protocol

Abstract

Modbus protocol is widely deployed in critical industrial systems or supervisory control and data acquisition (SCADA) systems. With the increasing demands on industrial networks, the Modbus protocol is also connected over the Internet using TCP/IP protocol or other transmission protocol. Using the Internet infrastructure, the systems are likely vulnerable to risks, which causes unpredictabe damages. In this paper, the author propose a solution of symmetric key cipher AES for high-secured Modbus TCP/IP protocol. This approach aims at reducing vulnerabilities, enhancing security, authentication and integrity in Modbus TCP/IP protocol to prevent cyber attacks on SCADA systems using this protocol.