.wpb_animate_when_almost_visible { opacity: 1; }
  • Facts
  • Interesting
  • Biographies
  • Sights
  • Home
  • Facts
  • Interesting
  • Biographies
  • Sights
Unusual facts

What is captcha

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.

Watch the video: What is CAPTCHA and What are Its Different Types? (June 2025).

Previous Article

What is ping

Next Article

Euclid

Similar Articles

Igor Vernik

Igor Vernik

2020
Confidence quotes

Confidence quotes

2020
15 facts about the husky: the breed that traveled around the world from Russia to Russia

15 facts about the husky: the breed that traveled around the world from Russia to Russia

2020
Valery Kharlamov

Valery Kharlamov

2020
Hanging Gardens of Babylon

Hanging Gardens of Babylon

2020
10 facts about pines: human health, ships and furniture

10 facts about pines: human health, ships and furniture

2020

Leave Your Comment


Interesting Articles
Amazing facts about the Chukchi

Amazing facts about the Chukchi

2020
Alexandra Pakhmutova

Alexandra Pakhmutova

2020
Vasily Stalin

Vasily Stalin

2020

Popular Categories

  • Facts
  • Interesting
  • Biographies
  • Sights

About Us

Unusual facts

Share With Your Friends

Copyright 2025 \ Unusual facts

  • Facts
  • Interesting
  • Biographies
  • Sights

© 2025 https://kuzminykh.org - Unusual facts