All: In a further effort to deter spam, Roanoke.com has added a "captcha" code bar for readers to type in before they enter a comment. We hope these human-readable images will thwart the loathsome ...

Captcha (Completely Automated Public Turing test to tell Computers and Humans Apart) has become the standard term for simple human-or-robot tests. There are many different types of the process. It was ...

A report from security firm BitDefender suggests that spammers may have found a way to automatically break through certain types of graphical “captcha” code. “Captchas” are used in an attempt to ...