Absicherung von SCADA-Protokollen

Bachelor Thesis



The complexity of the technical processes in the industry increases more and more. The so-called SCADA (Supervisory Control and Data Acquisition) systems are often used to monitor these processes. As applications also include critical infrastructure, the security of these systems is very important. However, as previous research has pointed out several times, the security aspect is often realized insufficiently. In this thesis the Modbus TCP protocol is considered, which is widely used in the SCADA systems in the industry.

There already exist many approaches and research that deal with the basic cryptographic protocol weaknesses. Furthermore, the ability of internal attackers to send faulty instructions must be considered. In this thesis, a program is developed that allows filtering requests. For this purpose the user can determine constraints to deny faulty instructions.

The analysis has shown that the performance of the program depends on the rule configuration. Considering this aspect, the program is suitable for practical operation and definitely provides additional benefits in security to systems that communicate with Modbus TCP.

Start: 15.04.2017

End: 14.07.2017


Student: Felix Kosterhon

Research Areas: CROSSING, CYSEC, Sichere Mobile Netze , S1



Prof. Dr.-Ing. Matthias Hollick

Technische Universität Darmstadt
Department of Computer Science
Secure Mobile Networking Lab 

Mornewegstr. 32 (S4/14)
64293 Darmstadt, Germany

Phone: +49 6151 16-25472
Fax: +49 6151 16-25471


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