Online Signature Verification and Authentication using Smart Phones

Abstract

The proposed system is designed to determine whether the person signing on any touch screen device is authenticated user or not. This can be done by verifying his/her handwritten signature which is a socially accepted biometric trait for authenticating an individual. There are two types of handwritten signature verification systems: offline and online systems. In an off-line system, just an image of the user?s signature is acquired without additional attributes, whereas, in an online system, a sequence of x-y coordinates of the user?s signature, along with many other attributes are also acquired. In our paper, we have created a client (mobile) application which captures the user?s signature and extracts various features like pressure, time and x-y co-ordinates and the server application verifies these features to find whether the signature has been done by an authenticated user or a forger. The implementation is done using Python and the GUI is coded using Xcode.