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.

Abstract: There is a substantial emphasis on security design of Text based CAPTCHA by way of providing the security at pre-processing layer, segmentation layer and character recognition layer. The ...

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 ...