关键词: 工业控制系统, Modbus-TCP协议, 隐蔽信道, 数据完整性

Abstract:

With the rapid advancement of information technology, Internet of Things have?been applied in many?fields, which bring new chances for connecting industrial control system to the Internet. However, since these systems are originally designed for using in physically isolated environments, the protocols used by industrial control system have almost no security features and are vulnerable to a variety of attacks. This paper proposes a Modbus-TCP integrity check based on covert channel, simulation results and security analysis show that using this technology as a secure communication method can resist many network attacks, improve the data security capability of industrial control system.

Key words: Industrial Control System（ICS）, Modbus-TCP protocol, covert channel, data integrity