Monday, December 01, 2008

Metadata: An Invisible CAPTCHA

"Sanjay Sehgal thinks the average CAPTCHA, that collection of deformed characters that Web sites ask users to type out when registering for an account, is both too easy and too demanding. The image tests designed to weed out spam-spewing bots often annoy real people--and rarely keep out determined spammers."

Metadata: An Invisible CAPTCHA -

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