Paper Title
An Intelligent Digital Door Locking System

Abstract
Technology has been evolved a lot in last few decades and one of the major evolutions is smart devices. Smart devices make a person’s life convenient and updated. As the technology is improved, the security is also increased by using this modern technology. One of the uses of the technology is in used to make the smart door locking system. The manual locking system consists of lock and key has the disadvantage which is losing the keys or keys in wrong hand or, to overcome this advantage the concept of smart door locking system is come to the picture. Smart door locks, which do not require a physical key to operate, let you unlock your door without one. A smartphone app can be used to remotely operate them. The smart door lock can be access by fingerprint recognition, RFID (Radio frequency identification), Internet of Things (IoT), face recognition and many more ways. Keywords - smart door lock system, security, RFID, GSM, face recognition, and fingerprint recognition, Door lock, Smart door lock System, Security, RFID, GSM, Arduino microcontroller, Fingerprint recognition, Facial recognition, Internet of Things, Knock-pattern, Colour Image Edge Detection