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SUMMARY:Colour\, usability and computer security - Jeff Yan\, Newcastle Un
 iversity
DTSTART:20100701T151500Z
DTEND:20100701T161500Z
UID:TALK25070@talks.cam.ac.uk
CONTACT:Jonathan Anderson
DESCRIPTION:The use of colour in user interfaces is extensive. It is typic
 ally a usability issue\, and has rarely caused any security concerns. In t
 his talk\, I show that the use of colours in the design of CAPTCHA\, a sta
 ndard security technology that has found widespread applications in commer
 cial websites\, can have interesting but critical implications on both sec
 urity and usability. For example\, we have broken multiple CAPTCHAs\, incl
 uding the scheme deployed by Megaupload.com (one of the largest file shari
 ng websites)\, by exploiting the colour patterns in these schemes. 
LOCATION:Room SS03\, Computer Laboratory\, William Gates Building
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