The technology essential for IoT (Internet of Things) security includes end-to-end encryption, which protects data transmitted between devices and ensures privacy. Other critical technologies involve firewalls, intrusion detection systems, and secure access protocols to safeguard networks against unauthorized access and cyber threats. Additionally, implementing strong authentication mechanisms and regular software updates further enhance IoT security. As the number of connected devices continues to grow, adopting these security technologies is vital for preserving user confidence and preventing data breaches.