How IoT security works
IoT devices are often built with minimal processing power, so they may lack strong authentication, encryption or a way to patch. Many ship with default passwords, expose management interfaces, and run for years without updates after the vendor loses interest.
Security therefore focuses on the surrounding environment: discovering which devices exist, placing them on isolated network segments, limiting their communications to what they need, and monitoring their traffic for anomalies. Device identity and secure update mechanisms are also important. Examples include IP cameras, badge readers, building controls, medical devices, printers and environmental sensors, many of which connect through consumer-grade components.
Why it matters for Canadian organizations
Compromised IoT devices have been used as entry points into corporate networks and as members of botnets. Because they are often unmanaged and unmonitored, a camera or sensor can be an unnoticed foothold.
In sectors such as healthcare, manufacturing and utilities, connected devices may affect safety and operations. Canadian organizations should treat them as part of their regulated attack surface, supporting duties under PIPEDA, Quebec Law 25 and sector requirements. Procurement is a control point, so ask vendors about update policies, vulnerability disclosure, default credential handling and how long security fixes will be provided.
How to defend against it
Keep an inventory of every connected device, change default credentials, disable unused services and apply firmware updates where available. Segment IoT into separate networks with strict firewall rules.
Monitor device traffic for unusual destinations, and include devices in vulnerability management. Consider security and support lifespan when purchasing, and plan to replace devices that can no longer be patched. Passive network monitoring can identify devices without disturbing them, which is useful for fragile equipment that cannot tolerate active scanning. Document ownership for each device.
Frequently asked questions
Why are IoT devices hard to secure?
They often have limited resources, weak default settings, infrequent or unavailable updates and long lifespans, and they are numerous and poorly inventoried. These traits make consistent patching and monitoring difficult, so network-level controls matter more.
Is IoT security the same as OT security?
They overlap but differ. IoT usually refers to general connected devices, while operational technology refers to industrial control systems that run physical processes and prioritize safety and availability. Many techniques apply to both, but OT needs specialized care.
What is the first step in securing IoT devices?
Discover and inventory them. You cannot protect what you do not know exists. After that, change default credentials, segment the devices onto their own network and restrict their communication to only what they need.
Related service: Managed security