Vulnerability analysis of captcha using Deep learning. (arXiv:2302.09389v1 [cs.CR])

Several websites improve their security and avoid dangerous Internet attacks
by implementing CAPTCHAs (Completely Automated Public Turing test to tell
Computers and Humans Apart), a type of verification to identify whether the
end-user is human or a robot. The most prevalent type of CAPTCHA is text-based,
designed to be easily recognized by humans while being unsolvable towards
machines or robots. However, as deep learning technology progresses,
development of convolutional neural network (CNN) models that predict
text-based CAPTCHAs becomes easier. The …

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