Industrial Controls Cyber Security (IMAGE) Southwest Research Institute Caption SwRI used programmable logic controllers (PLCs) connected to input/output (I/O) modules to a test network. Algorithms scanned the network for cyberattacks through data packets transferred over the Modbus/TCP protocol. Credit Southwest Research Institute Usage Restrictions Images/videos may be used by the media and the public for educational and informational purposes only. License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.