The difference between CAPTCHA and RECAPTCHA

Question

What is the difference between CAPTCHA and RECAPTCHA?

What is the best situation for choosing RECAPTCHA?

Answer 1

CAPTCHA is an identity verification test (usually blurred letters that need to be decrypted) used by many sites to prevent spam.

reCAPTCHA is the reverse CAPTCHA - the same test that is used not only to prevent spam, but also to help with the digitalazion project. In other words, reCAPTCHA tests are not a meaningless combination of words, but excerpts from books that pass a number, while CAPTCHA uses several methods of verification of identity, including mathematical or general questions of knowledge, visual puzzles and even chess puzzles.

Google bought reCAPTCHA a few years ago, and now it is also used to collect street view data.

Answer 2

CAPTCHA (Turing's fully automated public test that talks about computers and people separately) is a program that can determine if its user is a person or a computer. The process includes a computer requesting a simple test generated by the computer from the user. Since other computers cannot solve CAPTCHA, any user entering the correct solution is considered human. It is sometimes described as a Turing reverse test because it is performed by a machine and is intended for humans. reCAPTCHA does just that, directing the effort spent solving CAPTCHA online to reading books.
reCaptcha is hosted by Google, and one of the most interesting things about it is that it is used to digitize the text of old newspapers and books. That's why there are two "sections" of reCaptcha instead of one series of characters for CAPTCHA - one is known text, the other is not. If you correctly know the known, it assumes that you have received the second. Then next time, when he offers the same "unknown" text, he is considered, possibly, known. A few more times with the same result for an “unknown” text, and it becomes “known”, and the text from which it arose can be correctly digitized. Clever, huh? In addition, due to frequent updates, I would expect reCAPTCHA to be slightly better at preventing bots from resolving them.
Link: https://anydifferencebetween.com/difference-between-captcha-and-recaptcha/

Answer 3

Recaptcha is a captcha type. This is easier for humans and relatively difficult for hacking bots, which is the only goal - to have captcha in forms. If you need captcha, go to recaptcha.

Answer 4

I think I remember captcha from a few years ago for Gmail. Recaptcha is easier for people, I usually had some difficulties with the old captcha, because I could not read the letters, it was difficult for me to understand the difference between “O” and “Q” or other similar letters, such as “mn” or “nm "recommend recaptcha over captcha, as it’s easier for real users, and you can always add a firewall to block bots.