Wearable computing is rapidly getting deployed in many—commercial, medical, and
personal—domains of day-to-day life. Wearable devices appear in various forms, shapes …

We present acoustic barcodes, structured patterns of physical notches that, when swiped
with eg, a fingernail, produce a complex sound that can be resolved to a binary ID. A single …

In this chapter, we briefly review the development of natural user interfaces and discuss their
role in providing human-computer interaction that is immersive in various ways. Then we …

We present Fiberio, a rear-projected multitouch table that identifies users biometrically
based on their fingerprints during each touch interaction. Fiberio accomplishes this using a …

Mobile authentication is indispensable for preventing unauthorized access to multi-touch
mobile devices. Existing mobile authentication techniques are often cumbersome to use and …

As we are surrounded by an ever-larger variety of post-PC devices, the traditional methods
for identifying and authenticating users have become cumbersome and time-consuming. In …

At present, touchscreens can differentiate multiple points of contact, but not who is touching
the device. In this work, we consider how the electrical properties of humans and their attire …

Wearables are a rapidly emerging device category with wide-reaching use scenarios. The
novel form factors and broad potential of this technology pose new security challenges …

Interactive surfaces have great potential for co-located collaboration because of their ability
to track multiple inputs simultaneously. However, the multi-user experience on these devices …

We propose a new approach for touch detection on optical multi-touch devices that exploits
the fact that the camera images reveal not only the actual touch points, but also objects …