中文摘要：

为了研究工业控制网络的安全,对工业控制网络中应用最广泛的Modbus协议的安全性进行了分析.分析比较了Modbus主设备认证算法和Modbus Sec认证算法两种算法的优劣,明确了今后对Modbus工控网络安全的研究方向.

英文摘要：

In order to study the safety of industrial control networks, the most widely used Modbus protocol security in industrial control networks is analyzed. The Modbus master authentication algorithm and ModbusSec authentication algorithm are analyzed comparatively. Analysis of the advantages and disadvantages of the two algorithms is conducted. The future research direction of Modbus industrial network security is clarified.