BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Talks.cam//talks.cam.ac.uk//
X-WR-CALNAME:Talks.cam
BEGIN:VEVENT
SUMMARY:Captchas - the state of play - Dr Jeff Yan\, Newcastle University
DTSTART:20150428T130000Z
DTEND:20150428T140000Z
UID:TALK58608@talks.cam.ac.uk
CONTACT:Laurent Simon
DESCRIPTION:*Abstract: *\nText Captchas have been ubiquitous on the Intern
 et\, and breaking some of them is rarely news. But until very recently\, i
 t had remained an open problem outstanding for about 15 years: Is there a 
 single but generic attack that breaks them all? \n\nIn this talk\, I will 
 introduce a surprisingly simple\, but generic attack that breaks a wide va
 riety of representative schemes\, each with distinctive design features\, 
 including those deployed by Google\, Microsoft\, Yahoo!\, Amazon and other
  Internet giants. As an interesting coincidence\, our attack is deeply roo
 ted in seminal research done for very different purposes by Cambridge acad
 emics John Daugman and David Field (now at Cornell).\n\nOur attack probabl
 y pronounces a death sentence to the current common practice of Captcha de
 signs. To make up for this sin\, I will discuss how to design a game-chang
 ing scheme. Compared to the state of the art\, our new design significantl
 y increases both security and usability\, simultaneously. It also offers o
 ther technical advantages and enables interesting commercial applications.
  \n\n*Bio:*\n Jeff Yan did his PhD with Ross Anderson in the Lab\, and has
  taught at Newcastle\, and Chinese University of Hong Kong.
LOCATION:LT2\, Computer Laboratory\, William Gates Building
END:VEVENT
END:VCALENDAR