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CAPTCHA Security: A Case Study

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2 Author(s)
Jeff Yan ; Newcastle University, England ; Ahmad Salah El Ahmad

A simple but novel attack can break some CAPTCHAs with a success rate higher than 90 percent. In contrast to early work that relied on sophisticated computer vision or machine learning techniques, the authors used simple pattern recognition algorithms to exploit fatal design errors.

Published in:

IEEE Security & Privacy  (Volume:7 ,  Issue: 4 )