IoT-Enabled Smart Door Lock Featuring RFID, OTP and Intrusion Detection

The integration of IoT into modern security systems has significantly improved the access control and monitoring capabilities. This paper presents the design of a smart door lock system that combines the radio frequency identification (RFID), one-time password (OTP), and intrusion detection capabilities using a number of sensors, actuators and cloud-based platform. The proposed system aims to improve residential and institutional security by enabling a multi-factor authentication and real-time breach alerts. The authorized user can unlock the door using RFID tag while an OTP is generated and verified via a cloud server in case of an invalid RFID scan. At the same time, intrusions are detected through motion sensors and alerts are sent immediately to the admin via IoT enabled notifications. The testing results include the authentication success rate of 97%, intrusion detection accuracy of 90%, cloud uptime of 98.5%, RFID latency of 0.8 seconds and OTP latency of 1.2 seconds. The proposed system can be deployed to implement a secure and user-friendly door access in the offices, residential buildings, hostels and academic institutions, etc.