A User Authentication Scheme Using Physiological and Behavioral Biometrics for Multitouch Devices

Algorithm 1

Check orientation algorithm.

Input: DeviceOrientationEvent //By JavaScript

Output: alert()

(1) assign beta = event.beta; //event is provided by JavaScript

(2) if  Math.round(beta * 10)/10) < 10 then

    alert (“please hold the tablet to start input procedure”);

(3) else

(4)  start physiological biometrics extraction;