The New Rules of IoT Security: Building Resilience for 2025

As global IoT adoption surpasses 19 billion connected devices in 2025, enterprises face an unprecedented expansion of the attack surface — with IoT security spending projected to top $11 billion this year and climb toward $50 billion by 2026. Despite these investments, one in three breaches now involves an IoT device, and over half of deployed IoT systems still carry critical vulnerabilities.

This article explores why traditional IT security models are insufficient for today’s hyperconnected, resource-constrained, and physically integrated IoT environments. It examines how emerging capabilities like AI, edge computing, and zero trust architectures are redefining defense strategies, and offers sector-specific best practices for industries such as healthcare, manufacturing, smart cities, and consumer IoT. Finally, it details what a 2025-ready IoT security posture must include to protect not only data, but also the physical safety and business continuity of the modern enterprise.