Intelligent electronic lock with user-defined graphical key

In this paper, we present a novel authentication method based on image feature matching to make intelligent lock key can be defined by user which will improve the security and ease-use of intelligent electronic lock. It is a new unlock scheme for intelligent lock that may replaces the text passwords and biological features which are typically used in intelligent lock system. In this method, an object or a digital picture displayed on a physical user-owned device such as a mobile phone can be defined as the intelligent electronic lock key. Firstly, obtain the image of object or digital picture that user defines as the key and the image of the user used for unlocking respectively. Secondly, highly distinctive optical features are extracted from two images and then matching with the features, afterwards the distance between two image's keypoints constitute a discriminant vector. Finally, a LINEAR Support Vector Machine (SVM) is used to classify the discriminant vector. Simulation and experimental results demonstrate the feasibility of proposed approach. The experimental results have obtained satisfactory effect.