Project Overview

SGA assisted a manufacturing facility in modernising their PLC systems with a focus on cybersecurity best practices. This involved conducting a risk assessment to identify potential vulnerabilities and threats, implementing cybersecurity best practices such as network segmentation and access control, replacing legacy PLCs with modern ones equipped with enhanced security features, and ensuring compliance with industry standards and regulations.

As a result of SGA’s efforts, the client was able to improve the efficiency of
their manufacturing processes, enhance the cybersecurity of their PLC systems,
minimise downtime and disruption during the upgrade, and comply with relevant industry standards and regulations.

  • Improved Efficiency
  • Enhanced Cybersecurity
  • Minimal Downtime
  • Regulatory Compliance
The brief

the need to enhance the security of PLCs is now of critical concern

In the modern industrial landscape, the reliance on Programmable Logic Controllers (PLCs) is paramount for the efficient and automated operation of manufacturing processes.

However, as industry 4.0 and the Industrial Internet of Things (IIoT) continue to advance, the need to enhance the security of PLCs becomes a critical concern.

This case study delves into the process of modernising PLCs while implementing cybersecurity best practices in a manufacturing facility.

A leading manufacturing facility with a legacy automation system faced numerous challenges due to outdated PLCs that lacked modern security features. The management recognised the need to upgrade the PLCs to enhance efficiency and protect against potential cyber threats.

The primary objectives of the PLC modernisation project were:

  • Improve the efficiency of manufacturing processes.
  • Enhance the cybersecurity of PLC systems to protect against cyber threats and data breaches.
  • Ensure minimal downtime and disruption during the upgrade.
  • Compliance with relevant industry standards and regulations.
methodology

How did we ensure Security?

Before initiating the modernisation project, a comprehensive risk assessment was conducted to identify potential vulnerabilities and threats to the existing PLC infrastructure. The assessment considered physical security, network security, access controls, and potential entry points for cyberattacks.

The project team followed cybersecurity best practices, which included:

  • Network Segmentation: Segregating the network into different zones to isolate the PLC network from other parts of the organisation, limiting access to critical systems.
  • Access Control: Implementing strict access control measures, including two-factor authentication and role-based access, to limit who could interact with the PLC systems.
  • Regular Updates and Patch Management: Establishing a protocol for regular updates and patches to ensure that the PLC software and firmware were always up to date with the latest security enhancements.
  • Intrusion Detection Systems (IDS): Deploying IDS to monitor network traffic for unusual or unauthorised activities, alerting administrators to potential security breaches.
  • Security Training: Conducting employee training to raise awareness about cybersecurity threats and best practices.
  • Identifying PLCs to be upgraded and their compatibility with the new systems.
  • Replacing legacy PLCs with modern ones equipped with enhanced security features.
  • Ensuring minimal downtime during the transition through careful planning and scheduling.
  • Testing the new PLC systems extensively to ensure functionality and security.

The project adhered to industry standards and regulations such as NIST cybersecurity framework, IEC 62443, and ISO 27001 to ensure that the new PLC infrastructure is cybersecurity compliant.

The Results?

The PLC modernisation project with a focus on cybersecurity best practices yielded the following results:

Regulatory Compliance: The company’s adherence to industry standards and regulations ensured compliance with cybersecurity best practices.

Improved Efficiency: The new PLC systems enabled more efficient manufacturing processes, leading to increased productivity.

Enhanced Cybersecurity: The implemented best practices significantly improved the security of the PLC infrastructure, reducing the risk of cyber threats and data breaches.