What is Use your Illusion
Use your Illusion is a novel mechanism for user authentication
that is secure and usable regardless of the size of the device on which
it is used. The system relies on the human ability to recognize a
degraded version of a previously seen image.
You can try Use Your Illusion on your browser.
Try it now!
To better understand the cognitive process behing Use Your Illusion,
try the following experiment.
- The above image is a distortion of a photo. Try to guess what the
original photo represents.
- Click the image, the original photo pops up.
Compare your guess to the original photo.
- Look again at the distorted image. Do you see what it looks like now?
To someone who has
seen both pictures, it is clear that the distorted image
represents the object in its original image, and
that seeing the distorted image evokes
the original object. However, without having been exposed to
the original photo, the distorted image does
not carry much meaning.
More details? Check our papers
Eiji Hayashi, Nicolas Christin, Rachna Dhamija, and Adrian Perrig
Use Your Illusion: Secure Authentication Usable Anywhere
In Proceedings of the Fourth Symposium on Usable Privacy and Security (SOUPS'08).
Pittsburgh, PA. July 2008
See also preliminary version:
Mental Trapdoors for User Authentication on Small Mobile Devices
CMU CyLab Technical Report
CMU-CyLab-07-011, August 2007