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» Reverse Engineering CAPTCHAs
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WCRE
2008
IEEE
10 years 4 days ago
Reverse Engineering CAPTCHAs
CAPTCHAs are automated Turing tests used to determine if the end-user is human and not an automated program. Users are asked to read and answer Visual CAPTCHAs, which often appear...
Abram Hindle, Michael W. Godfrey, Richard C. Holt
WMCSA
2008
IEEE
10 years 4 days ago
Making CAPTCHAs clickable
We show how to convert regular keyboard-entry CAPTCHAs into clickable CAPTCHAs. The goal of this conversion is to simplify and speed-up the entry of the CAPTCHA solution, to minim...
Richard Chow, Philippe Golle, Markus Jakobsson, Lu...
SAC
2010
ACM
10 years 18 days ago
CAPTCHA smuggling: hijacking web browsing sessions to create CAPTCHA farms
CAPTCHAs protect online resources and services from automated access. From an attacker’s point of view, they are typically perceived as an annoyance that prevents the mass creat...
Manuel Egele, Leyla Bilge, Engin Kirda, Christophe...
USS
2010
9 years 3 months ago
Re: CAPTCHAs-Understanding CAPTCHA-Solving Services in an Economic Context
Reverse Turing tests, or CAPTCHAs, have become an ubiquitous defense used to protect open Web resources from being exploited at scale. An effective CAPTCHA resists existing mechan...
Marti Motoyama, Kirill Levchenko, Chris Kanich, Da...
RAID
2015
Springer
4 years 1 months ago
Reverse Engineering Intel Last-Level Cache Complex Addressing Using Performance Counters
Cache attacks, which exploit differences in timing to perform covert or side channels, are now well understood. Recent works leverage the last level cache to perform cache attacks...
Clémentine Maurice, Nicolas Le Scouarnec, C...
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