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By Rita Okoye
Adedayo Jalil Bello, a leading Cybersecurity and Digital Resilience Advocate, has published a thought-provoking article titled, “Smart Devices, Old Systems: A Recipe for Disaster,” highlighting the cybersecurity risks posed by integrating legacy systems with modern Internet of Things (IoT) devices.
As technology rapidly evolves, IoT devices—ranging from smart thermostats to connected manufacturing equipment—are transforming daily life and business operations, offering convenience and efficiency. However, Adedayo warns that the growing reliance on IoT devices in tandem with outdated legacy systems could create significant vulnerabilities.
“While IoT devices bring unprecedented convenience, many organizations still rely on older systems that were never designed to interact with these modern technologies,” said Adedayo. “These legacy systems lack the cybersecurity protocols and encryption capabilities necessary to safeguard against the evolving threats that IoT devices may introduce.”
Adedayo’s article details the dangers of connecting IoT devices to older systems, which may lack encryption, authentication, or regular updates. Such devices are vulnerable to cyber threats, and legacy systems, with outdated security frameworks, are often incapable of addressing these risks.
Security and compatibility issues
In addition to security concerns, Adedayo also highlights the compatibility issues that arise when legacy systems and IoT devices are integrated. The failure to communicate seamlessly between these technologies can lead to data leaks, errors, and inefficiencies, which could compromise sensitive information. Over time, these problems could escalate into larger security crises.
As the IoT network expands, legacy systems face scalability issues. They may not be able to accommodate the growing number of connected devices, resulting in network overloads, system downtimes, and degraded performance—all of which increase cybersecurity risks.
To mitigate these risks, Adedayo advocates for adopting a modern cybersecurity approach: Zero Trust architecture. This strategy, based on the principle of “never trust, always verify,” ensures that every device and user on a network is authenticated and authorized before access is granted, regardless of their location within the organization. For environments where IoT and legacy systems coexist, Zero Trust can be particularly effective in reducing vulnerabilities and preventing unauthorized access.
Zero Trust also enables micro-segmentation, which tightly controls network access and monitors activity, thereby containing potential breaches before they spread. Additionally, the integration of continuous monitoring, strong encryption, and real-time anomaly detection provides an extra layer of security for both legacy systems and IoT devices.
Adedayo suggests several best practices to secure networks that rely on legacy systems while incorporating IoT technology. These include conducting thorough risk assessments, applying regular security patches to both IoT devices and legacy systems, and implementing strong authentication protocols, such as multi-factor authentication (MFA) and role-based access control (RBAC). He also emphasizes the importance of staff education and awareness programs to minimize human error and enhance overall security.
With the increasing integration of IoT and AI, Adedayo sees a significant opportunity for AI to play a key role in securing networks. AI’s predictive capabilities will become crucial in identifying emerging threats and fortifying defenses against cyber-attacks on legacy systems and IoT devices alike.
Adedayo, who holds an MSc in Cybersecurity and an MSc in Information Science, has dedicated his career to researching and promoting digital resilience. Through his work as a mentor and researcher, he strives to help others understand the importance of cybersecurity and how they can protect themselves and their organizations from evolving threats.
As IoT networks continue to expand, organizations must prioritize securing their digital infrastructure by adopting modern cybersecurity strategies like Zero Trust, staying proactive with risk assessments, and leveraging emerging technologies such as AI. Adedayo urges businesses to understand the risks of combining old and new technologies and to take immediate steps to safeguard their systems.
