Securing devices designed for a lifespan measured in decades presents unique challenges vastly different from traditional IT security. Unlike computers or smartphones updated frequently, long-life Internet of Things (IoT) devices often operate remotely, with limited processing power, memory, and intermittent connectivity. Protecting these essential assets over their extended service requires a strategic, security-first approach from the outset.
One fundamental layer of defense is ensuring the device boots only trusted software. Implementing a secure boot process verifies the authenticity and integrity of the firmware before execution, establishing a hardware root of trust. This prevents malicious code from taking control during startup.
Given the long operational life, the ability to remotely update device software is absolutely critical. Over-The-Air (OTA) firmware updates are essential for patching vulnerabilities discovered years after deployment. The update mechanism itself must be highly secure, employing cryptographic verification to ensure only authorized and unaltered updates are installed.
Communication security is paramount. Devices must use robust, industry-standard encryption protocols for all data transmitted and received. This protects sensitive information from eavesdropping and tampering. Likewise, data stored on the device (data at rest) should be encrypted whenever possible, especially if it contains sensitive information.
Controlling access is another vital component. Strong authentication and authorization mechanisms are necessary to ensure only legitimate users, systems, or other devices can interact with or command the device. Default credentials must be eliminated, and secure key management practices are crucial.
Continuous monitoring and threat detection are vital over a long lifespan. Devices or a central platform should monitor for unusual behavior, unauthorized access attempts, or signs of compromise. An effective incident response plan is necessary to address security events promptly.
Finally, the entire lifecycle management of the device, from manufacturing supply chain security to secure decommissioning at the end of its service, must be considered. Ensuring secure provisioning and having a plan for securely erasing data and disabling a device when it’s retired prevents it from becoming a lingering vulnerability. Embracing security by design, integrating these strategies from the very first concept phase, is the only way to build truly resilient, long-lasting IoT deployments.
Source: https://www.helpnetsecurity.com/2025/06/20/rob-ter-linden-signify-iot-devices-network-security/
