This paper presents BoD Shapes, a novel authentication method for smartphones that uses
the back of the device for input. We argue that this increases the resistance to shoulder …

In this paper, we present XSide, an authentication mechanism that uses the front and the
back of smartphones to enter stroke-based passwords. Users can switch sides during input …

In this paper, we present SwiPIN, a novel authentication system that allows input of
traditional PINs using simple touch gestures like up or down and makes it secure against …

Smartphones have been widely used with a vast array of sensitive and private information
stored on these devices. To secure such information from being leaked, user authentication …

In this paper we present ColorSnakes, a PIN-based authentication mechanism for
smartphones which uses fake paths on a grid of numbers to disguise user input. In a lab …

Given the nature of mobile devices and unlock procedures, unlock authentication is a prime
target for credential leaking via shoulder surfing, a form of an observation attack. While the …

We present the results of an MTurk survey (n= 383) on the reasons for using and not using
biometric authentication systems on smartphones. We focused on Apple's Touch ID as well …

Smartphones are now frequently used by end-users as the portals to cloud-based services,
and smartphones are easily stolen or co-opted by an attacker. Beyond the initial login …

User authentication is important to protect sensitive and private information for smartphone
users. We propose Waving Authentication (WA) which is a motion gesture authentication …

Most of today's smartphones and tablet computers feature touchscreens as the main way of
interaction. By using these touchscreens, oily residues of the users' fingers, smudge, remain …