What is captcha on a website

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Those who regularly access the Internet know about captcha firsthand, since they have entered it on different sites more than once. However, not all users understand why captcha is needed, and simply enter it without much thought and lengthy reasoning. Moreover, those who have their own web resource realize that captcha on the site is extremely desirable, but do not fully understand the essence of its idea.

The World Wide Web is, at first glance, an france business email list easy, comfortable space. Shopping in online stores is simple and convenient. Website developers are constantly introducing new features to attract buyers to their resource, since their financial well-being depends on the number of leads. Everything is quiet, peaceful and in its own way.

Captcha

But this simplicity is only apparent. To make a dishonest move, to play against the rules - such actions are everywhere where profit is at stake. On the Internet, robot programs actively operate under the guise of people. They imitate human actions, send letters, actively register on various sites. But bots do not do this in order to order and buy something - SEO optimizers use spam programs so that they place external links.

Owners of Internet resources do not welcome robot attacks. Therefore, they use captcha as one of the ways to protect the site from spam.

CAPTCHA is an abbreviation of English origin. It consists of the expression "Completely Automated Public Turing test to tell Computers and Humans Apart". It is translated into Russian as "completely automated and public Turing test to tell a computer from a human".

Turing, mentioned in the translation, stood at the origins of computer development and proposed the first model of a computer at the beginning of the 20th century.

Captcha is designed to protect a web resource from spammers. It is required to be entered for any type of communication between a visitor and a site, namely:

during registration;

when entering comments;

upon authorization;