C A P T C H A
Blog posts, Publications and Talks
09
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Easy does it: more usable captchas
Publication - web security - CHI 2014
The Art of Breaking and Designing CAPTCHAS
Talk - web security - RSA 2012
Text-based captcha strengths and weaknesses
Publication - web security - CCS 2011
Five surprising captcha schemes
Blog post - web security - Mar 2011
Decaptcha breaking 75% of ebay audio captchas
Publication - web security - WOOT 2009
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