AES ON MODBUS ASCII TO PREVENT AGAINST ACTIVE ATTACKS

Abstract

The integration of industrial control systems with standard network infrastructure has amplified their vulnerability to cyberattacks, thereby underscoring the urgent need for robust security mechanisms. Modbus, a widely adopted communication protocol in industrial automation, is particularly susceptible to various cyber threats due to its inherent lack of security features. This research delves into the application of Advanced Encryption Standard on Modbus ASCII to fortify industrial control systems against evolving cyber threats, especially active attacks.  Active attacks targeting Modbus networks can have dire consequences, ranging from financial losses for control system operators to safety concerns for the public who rely on these services. In light of the escalating number and complexity of cybersecurity incidents and threats, it has become crucial to analyze the cybersecurity of Modbus/TCP and to develop cryptography-based solutions. This study aims to investigate the effectiveness of AES encryption in mitigating these risks, focusing on its implementation within the Modbus ASCII framework. Man-in-the-middle attacks, intercepted information replay, and abnormal byte transferring are just a few of the many potential attacks that SCADA communication may face.