Side-channel attacks on mobile devices have gained increasing attention since their
introduction in 2007. While traditional side-channel attacks, such as power analysis attacks …

We introduce hand movement, orientation, and grasp (HMOG), a set of behavioral features
to continuously authenticate smartphone users. HMOG features unobtrusively capture subtle …

Mobile devices and technologies have become increasingly popular, offering comparable
storage and computational capabilities to desktop computers allowing users to store and …

Research has brought forth a variety of authentication systems to mitigate observation
attacks. However, there is little work about shoulder surfing situations in the real world. We …

One rising trend in today's consumer electronics is the wearable devices, eg, smartwatches.
With tens of millions of smartwatches shipped, however, the security implications of such …

Research on attacks which exploit video-based side-channels to decode text typed on a
smartphone has traditionally assumed that the adversary is able to leverage some …

Pattern lock is widely used as a mechanism for authentication and authorization on Android
devices. In this paper, we demonstrate a novel video-based attack to reconstruct Android …

Mobile devices have become an important part of our everyday life, harvesting more and
more confidential user information. Their portable nature and the great exposure to security …

Passive non-line-of-sight (NLOS) imaging has drawn great attention in recent years.
However, all existing methods are in common limited to simple hidden scenes, low-quality …

Touchscreen-based mobile devices such as smartphones and tablets are used daily by
billions of people for productivity and entertainment. This paper uncovers a new security …