What is captcha? Almost from the very beginning of the Internet, users are faced with such a thing as captcha or CAPTCHA. However, not everyone knows what it is and why it is needed.
In this article, we will take a closer look at what captcha means and what its role is.
What does captcha mean
Captcha is a computer test in the form of a set of corresponding characters used to determine whether a user is a human or a computer.
For example, you may be asked to enter the characters shown in the adjacent picture into a string. In another case, a person needs to perform a simple arithmetic operation or designate the requested pictures with birds.
All of the above puzzles are actually called CAPTCHAs.
In simple words, the word captcha is the Russian-language analogue of the English abbreviation "CAPTCHA", which means a special test to distinguish real users from computers (robots).
Captcha is protection against automatic spam
Captcha helps protect against spam messages, mass registrations on Internet sites, website hacking, etc.
As a rule, the rebus given by the CAPTCHA can be solved by any person without any problems, while for a computer this task is impossible.
Most often, letter or digital captcha is used, on which the inscriptions are depicted with some blur and interference. Such interference often annoys users, but they help to reliably protect Internet resources from hacker attacks.
Since a person does not always manage to read the captcha, the user can update it, as a result of which a different combination of symbols will appear on the picture.
Today, the so-called "reCAPTCHA" is often encountered, where the user just needs to put a "bird" in the designated field, instead of entering letters and numbers.
