With billions of interconnected devices transmitting sensitive data, the Internet of Things (IoT) presents new challenges to digital security. Ensuring data privacy and network resilience has become a top priority. Cybersecurity in the IoT Era addresses the vulnerabilities and protection strategies specific to IoT ecosystems. The book discusses encryption, authentication, intrusion detection, and secure communication protocols for smart devices. It also explores threat modeling and AI-based defense mechanisms. By blending theoretical frameworks with real-world case studies, it equips readers with the knowledge to design and manage secure IoT infrastructures.