A method for encrypting application data units in a water conservancy industrial control system
A technology that applies data units and industrial control systems, applied in the information field, can solve problems such as fieldbus network security issues, and achieve the effects of high resistance, reliable security, high compatibility and versatility
Active Publication Date: 2021-12-28
JIANGSU PROVINCE HYDROLOGY & WATER RESOURCES INVESTIGATION BUREAU
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[0005] To sum up, the idea of reusing relevant theories and technologies in computer networks to solve the security problems of fieldbus networks in water conservancy industrial control systems has quite high limitations under the current personnel and technical conditions
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[0037] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0038] Assume that in a water industry control system, there are control devices D1, D2, and D3 on the same field bus, among which D1 is the upper computer, set to master mode, and the address is 0x01; D2, D3 are lower computers, set to slave mode, The addresses are 0x02 and 0x03 respectively.
[0039] Application data unit encryption method in a kind of water conservancy industrial control system of the present invention, comprises the following steps:
[0040] S1: Use the configuration file in advance to write keys to the key configuration files of the copies G1, G2, and G3 of the encryption agent according to the following rules:
[0041] In G1, write the address 0x01 of D1, the session key of D1; write the address 0x02 of D2, the session key of D2; write the address 0x03 of D3, the session key of D3.
[0042] In G2, writ...
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The invention discloses an encryption method for an application data unit in a water conservancy industrial control system. An encryption agent program is installed between an application program of the water conservancy industrial control system and a field bus communication program to realize transparent encryption of the application data unit. In the encryption agent program, through the encryption scheme based on the domestic symmetric encryption algorithm, the functions of control device identity verification, fieldbus communication data confidentiality, and protocol packet integrity verification are realized, effectively preventing unauthorized and illegal devices from being on the fieldbus channel Monitoring, interception, and tampering of data monitoring and control information have high resistance to man-in-the-middle attacks, and reduce the security risks caused by intrusion of fieldbus channels in water conservancy automation control systems. The encryption agent program can be seamlessly connected to the existing water conservancy industrial control system, and has high equipment compatibility and versatility.
Description
technical field [0001] The invention belongs to the field of information technology, and in particular relates to a method for encrypting application data units in a water conservancy industrial control system. Background technique [0002] Among the water conservancy industrial control systems currently deployed in our country, most of them use the Field Bus (Field Bus) network to network the programmable logic controller (PLC) and the lower computer. The reason is that the physical layer media used in computer networks, such as STP, single-mode or multi-mode optical fibers, etc., have physical properties that cannot meet high weather resistance and high-intensity industrial application scenarios. With its excellent performance and price advantages, RS232 / 485 cables have been used in industrial automation control systems for more than 20 years and cannot be replaced in a short time. However, to replace the existing physical layer, the transformation cost is too high, even ...
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IPC IPC(8): H04L9/06H04L1/00
CPCH04L9/0631H04L9/0643H04L1/0061H04L2209/76
Inventor 陈宁高祥涛王美玲朱月曹晓宁张磊王培陈辉陆明赵峰
Owner JIANGSU PROVINCE HYDROLOGY & WATER RESOURCES INVESTIGATION BUREAU