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When you sign up why do Internet sites need to know if you're human?
Wiki User
∙ 13y ago
Well some times people get bots to sign in for sites and later try to hack the site, or to use a site to spread spam-type messages or advertising. Other sites use Captcha to verify "human registration" when the site offers rewards or gifts for participation.
Captcha is a program (more accurately a script) that presents a website visitor with a series of letter and number combinations which must be typed into a box for a form submission. The Captcha format is often slanted in some way, and the background may be white or with a design. Each component of Caputcha is designed to make it nearly impossible for a computer bot to randomly access multiple websites for malicious purposes.
Wiki User
∙ 13y ago
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