What is the Internet of Things (IoT)?

The Internet of Things describes the sprawling network of physical devices—beyond traditional computers and phones—that connect to the internet and exchange data.

This includes everything from smart thermostats and refrigerators to industrial sensors, medical devices, and building automation systems. In cybersecurity terms, IoT represents a massive and often poorly defended attack surface. Most IoT devices were designed with convenience in mind rather than security, which creates serious vulnerabilities.

The problem isn't just that these devices exist—it's how they're built and managed. Many ship with default passwords that users never change. They rarely receive security updates, and some manufacturers abandon support entirely after a product launch. Authentication mechanisms are often weak or nonexistent once initial setup is complete. This matters because IoT devices aren't isolated toys anymore. They're embedded in critical infrastructure, healthcare systems, manufacturing plants, and corporate networks. A compromised smart device can serve as an entry point for attackers to move laterally through a network, exfiltrate data, or disrupt operations. The sheer volume of IoT devices—projected to reach tens of billions globally—makes comprehensive security incredibly difficult.

The term "Internet of Things" emerged in 1999, coined by Kevin Ashton while working on radio-frequency identification (RFID) technology at Procter & Gamble. The concept itself predates the name—researchers had been connecting devices to networks since the early 1980s, with a modified Coke machine at Carnegie Mellon often cited as an early example. But the real explosion came with the convergence of cheap sensors, ubiquitous wireless connectivity, and cloud computing in the late 2000s and early 2010s.

Initially, IoT was framed as a convenience revolution. Smart homes would adjust themselves to your preferences. Industrial equipment would predict its own maintenance needs. Cities would optimize traffic and energy consumption. Security was an afterthought, if it was considered at all. The first major wake-up call came in 2016 with the Mirai botnet, which compromised hundreds of thousands of IoT devices—primarily cameras and routers with default credentials—and used them to launch massive distributed denial-of-service attacks. That incident forced the industry to reckon with what they'd built: a vast network of insecure devices with significant destructive potential.

IoT security failures create ripple effects that extend far beyond a single compromised device. When attackers gain access to an IoT device, they often use it as a foothold to explore the broader network. A vulnerable security camera can reveal network architecture. A compromised building management system can provide access to corporate data. Medical IoT devices—pacemakers, insulin pumps, hospital monitors—introduce life-or-death stakes to security considerations.

The operational technology world faces particular challenges. Industrial control systems and SCADA networks increasingly incorporate IoT sensors and controllers, blurring the line between IT and OT environments. A breach that starts with a temperature sensor in a manufacturing plant could cascade into production shutdowns or safety incidents. The problem compounds because many organizations lack visibility into their own IoT footprint. Shadow IoT—devices connected to networks without IT approval or knowledge—is rampant. Employees bring in smart speakers, fitness trackers, or personal assistants that create unmonitored access points. As IoT devices proliferate in both consumer and enterprise contexts, the security gap widens rather than narrows.

Plurilock addresses IoT security challenges through comprehensive assessment and hardening services. Our operational technology and industrial control security testing identifies vulnerabilities in IoT-heavy environments before attackers exploit them. We evaluate device configurations, network segmentation, authentication mechanisms, and potential attack pathways.

Our adversary simulation services test real-world IoT attack scenarios, from compromised sensors to lateral movement through connected devices. We help organizations gain visibility into their complete IoT footprint and implement practical controls that balance security with operational requirements.

This isn't about theoretical frameworks—it's about securing the devices that actually run your operations.