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Students: Heather Hutchings ,
Shwetak Patel
Small, portable devices such as PDAs and cellular phones provide a
convenient way for users to access data anytime and anywhere. Inherent
to the portability of these devices are small displays and the limited
input capabilities of pen input and phone keypads. To overcome these
difficulties we propose a system which would allow small device users to
opportunistically annex input and output devices that they encounter in
their environment. Users could annex a keyboard to quickly type an
email on their PDA or a monitor to view their calendar while talking on
their cellular phone. Current issues that we are exploring include
short range connections over Bluetooth and the value of splitting
interfaces between small devices and desktop computers.
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The goal of opportunistic annexing is to allow users to improve their
interaction experience by taking advantage of input and output resources
in their local environment. Annexing allowing users to improve the capability
of their personal devices without improving their luggability. |
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Users can potentially annex devices by pulling the desired interface
from the personal device using a public device, or by pushing it using the
personal device. We have augmented a cell phone with an accelerometer to explore
gesture authentication mechanisms when pulling interfaces. |
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A possible gesture users might make is to shake their device in a displayed
or predetermined sequence; such a gesture proves physical possession of the device
without requiring direct interaction with it. Authenticating by proving possession
is not vulnerable to reply attacks, unlike authenticating by demonstrating secret
knowledge (e.g. passwords). |
Publications:
Jeffrey S. Pierce and Heather E. Mahaney.
Opportunistic Annexing for Handheld
Devices: Opportunities and Challenges.
Human-Computer Interaction Consortium (HCIC) 2004, Fraser, CO.
Heather E. Mahaney and Jeffrey S. Pierce.
Opportunistic Awareness: Annexing
Peripheral Devices for Information Monitoring.
Position paper and presentation for the Workshop on Multi-Device
Interfaces for Ubiquitous Peripheral Interaction at the Conference on
Ubiquitous Computing (UBICOMP) 2003, Seattle, WA.
Shwetak N. Patel, Jeffrey S. Pierce, and Gregory D. Abowd.
A Gesture-based Authentication Scheme for Untrusted Public Terminals..
Proceedings of UIST '04, pages 157-160.
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