Abstract: CAPTCHAs are widely employed to safeguard systems against automated bots by differentiating human interactions from machine activities. They exist in various formats, including text, audio, ...

Abstract: A CAPTCHA is one of the popular, secure methods for securing web content from unauthorized access or malicious intruders. It ensures that the user is not a malicious user but a human being.

See how we created a form of invisible surveillance, who gets left out at the gate, and how we’re inadvertently teaching the ...

Because of its vast reach, and stellar text recognition capabilities, CAPTCHA software has been used in a range of other ways ...