Learn to protect PLC software from tampering, copying, and cyber threats.
Understanding The Need For Software Security In PLCs
Modern manufacturing plants and equipment depend on software-driven programmable logic controllers (PLCs) to run safely and efficiently. As these systems become more connected, they also become more vulnerable—plc code is a valuable target for tampering, theft, and sabotage. What once required physical access can now be exploited through networked vulnerabilities.
Securing software in industrial control systems isn’t just about protecting intellectual property—it’s also about preventing unauthorized changes that could disrupt production, damage machinery, or compromise human safety.
For ISVs building industrial applications, understanding PLC cybersecurity best practices is critical to developing trusted, resilient solutions.
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Layers Of Protection For PLC Code
Security measures must be implemented across the entire PLC environment—from hardware and firmware to runtime environments and communication protocols. Below are the most common strategies used to secure PLC code and prevent unauthorized actions.
Preventing Unauthorized Access to PLCs
Use secure authentication and role-based access controls to prevent unauthorized access to PLCs, both physically and over the network.
Protecting PLC Code from Tampering
Implement encryption and integrity checks to stop people from copying machine code or altering it during updates or remote transmissions
Securing the Development and Runtime Environments
Control access to IDEs, runtime binaries, and configuration tools to prevent internal threats or code injection during development.
Industrial Control System Cybersecurity Challenges
As industrial systems adopt remote monitoring and IoT integrations, the industrial control system cybersecurity landscape becomes more complex. Attack surfaces expand, and threat actors exploit both physical and digital vectors.
🡆Keeping Automation Systems Safe From Cyberattacks
Firewalls, VPNs, intrusion detection, and continuous monitoring play a vital role in keeping automation systems safe from cyberattacks.
🡆Securing Communication Between Devices
Encrypt communication channels to secure software in manufacturing machines that interact across distributed networks or remote facilities.
🡆Maintaining Long-Term Software Integrity
Periodic software validation, patch management, and license enforcement help maintain software reliability throughout the PLC’s life cycle.
Benefits of Strong PLC Software Security
- Avoid Downtime and Sabotage: Secure PLC software minimizes the risk of malicious changes that could halt operations or damage equipment.
- Protect Intellectual Property: Safeguard your code from reverse engineering and unauthorized duplication.
How PLC Security Works
Security tools work by embedding protection at multiple points in the software lifecycle. This includes encrypting plc code, binding licenses to specific hardware, and using runtime monitoring to detect unauthorized changes. These protections are compatible with common embedded systems like ARM, x86, and PowerPC.
By combining strong licensing controls with anti-tampering technology, ISVs can build resilient software that protects both their intellectual property and the integrity of industrial operations.
Why ISVs Trust Software-Licensing As a Resource
- We provide clear, actionable guidance on software security for industrial environments
- Our insights are tailored to the needs of independent software vendors building automation solutions
- We stay current on PLC cybersecurity best practices and threat trends
- We explain not only how to apply protection, but why it matters—educating our readers every step of the way
Take Control of Your PLC Software Security
Protecting PLC code is no longer optional—it’s essential for building reliable, tamper-resistant, and secure automation systems. Whether you’re designing for manufacturing, energy, or infrastructure, strengthening your software against unauthorized access and manipulation protects your IP and your end users.