CAPTCHA tests aim at preventing attackers from performing automatic registration. In this paper we show that our prototype Decaptcha is able to successfully break 75% of eBay audio captchas. We compare its performance with the state of the art, readily available speech recognition system Sphinx and discuss the implications for eBay security.
Decaptcha breaking 75% of ebay audio captchas
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- Conference 3rd USENIX Workshop On Offensive Technologies 2009
- Authors Elie Bursztein , Steven Bethard