What happens if a search engine or other site asks you to enter text from a picture or find in the group of images those that fit a particular condition? This means that you are faced with captcha - a tool that separates people from cars. We tell you why it is needed, why you are sometimes forced to undergo this test and some more interesting facts about captcha.
The last twenty years, it’s hard to imagine the Internet without captcha: the automated Turing test is used to protect websites from spam, automatic registrations, password selection, cheating. These actions are performed by small programs - bots distributed by scammers. CAPTCHA is also a small program, but it solves another problem: it separates bots from people, as its task will be performed by an ordinary person, but the bot will fail.
Captcha - Russian version of the spelling of the word Captcha, which stands for Completely Automated Public Turing test to tell Computers and Humans Apart.
KWhat does a captcha look like
Most often, this is a set of characters - sometimes meaningful words, sometimes just letters and numbers mixed with special characters. To complicate the reading, various special effects are used: noise, transparency, slight deformation, etc. It is believed that in this case the robot will not be able to "read" the text, and an ordinary person will quickly cope. The second popular option is “behavioral captcha”, when the user needs to perform an action that proves that he is not a bot. Most often, just tick the box next to the phrase "I'm not a robot."
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There are other ways to separate bots from people:
Google loves to show blocks of 9 images, on which you need to select images with certain images: cars, fire hydrants, pedestrian crossings, etc .;
logical captchaes are popular: solve a mathematical example, select the nth number in a sequence of numbers, enter a word that starts with a certain letter, type a number in the keyboard that is written in letters, and vice versa;
on sites that are adapted for people with low vision, audio captcha is found;
on Facebook, the correct answer for captcha will be the name of the friend shown in the picture;
sometimes tasks are used as captcha where you need to deploy several objects in a row in the correct position.
CAPTCHA does not protect against spam by 100%, but it creates a lot of inconvenience to the person who sends it.
Often, captcha contains pictures with words from scanned books, magazines and newspapers. And Google as a captcha suggests recognizing house numbers and street names photographed by cars as part of the Google Street View project. Interestingly, five years ago Google itself developed an algorithm that correctly recognizes such labels in 99.8% of cases - that is, better than the average Internet user.
ПWhy Google and Yandex ask you to enter captcha
These search engines are accessed daily by millions of users, but bots send more requests. By asking for captcha input, Yandex and Google protect their servers from automatic requests.
Bots (or rather, special programs and services) need information about the positions of certain pages in the search results, sometimes they research keywords or simply click on the results or contextual advertising. The latter, by the way, is done to the detriment of competitors - in order to spend as much of their money allocated on an advertising campaign as possible. Bots are uninteresting and even harm search engines: they waste the computing resources of their servers, steal user information and disrupt the usual operation of ranking algorithms.
Search engines ask users to enter captcha when they notice suspicious activity. For example, Google uses this test in such cases:
You receive too many searches per unit of time;
You register a new mailbox, account on YouTube or other Google service;
You change the password in the service that you used before
You are setting up a connection to your smartphone on Android.
Many users are annoyed that sometimes captcha is so illegible that it has to be entered several times.
Add a description
Create carousel
Create carousel
You will also have to deal with captcha input, if you have installed browser extensions or plugins for keyword analysis, you use the text verification services for uniqueness or determine the ranking of websites in the search results. For example, often the cause of the ill-fated captcha to appear on the screen is the seemingly innocuous RDS Bar plugin for analyzing site performance. He asks for the citation index of the site, the number of pages in the search, the number of backlinks - all this seems extremely suspicious to search engines.
Both Yandex and Google are forced to enter captcha if many requests come from one IP address. This happens in large offices where the Internet is distributed to employees from one IP. To solve the problem, it is enough to ask the management to conduct a separate channel or give a dedicated IP address to those employees whose work involves a regular search of information on the Internet.
PWhy CAPTCHA is becoming more difficult
An outdated captcha written by laymen is a loophole for bots. They can use the information from the pages of the site to answer questions, guess the captcha with a small number of options (up to several hundred), or use the databases to select the correct answer. In the early 2000s, a simple picture or checkmark opposite the phrase "I am not a robot" was enough for a test of humanity.
Add a description
Create carousel
Create carousel
Today, site developers use more sophisticated verification methods that prevent crowds of bots from breaking through.
Captcha is one of the ways to train artificial intelligence (AI). When AI becomes smart enough to solve one problem, it is offered another, more complex one. Now the captcha that Google generates does not just separate people from bots, but watches us, collects information about behavior in standard and not very situations.
On the other hand, such tests still have a limit of difficulty: ordinary people should still be able to easily solve them. That’s why now scientists do not complicate tasks, but make them more humane and universal - such that a resident of any country, a bearer of any culture, language, religious beliefs, etc. copes well with the same captcha.
KHow to make money on captcha
Imagine the situation: you enter captcha several times in a row, and the site still does not agree with the correct answer and considers you a robot. Is that familiar? Fortunately, there is a solution, and one of the types of real earnings on the Internet is built on it. There are sites where users recognize captcha and get paid for it.
Who needs a captcha mass recognition service? The largest category is webmasters who use software to collect statistics on sites, keywords, promote web pages in search results. This software sends captcha to special services, there ordinary people solve it, and then the service sends a response back to the application. One captcha usually takes from 2 to 10 seconds. Such a job is worth a little, it is very monotonous, requires perseverance and certainly will not make you a millionaire. For example, to earn just one dollar, you need to recognize at least 1000 images! And the minimum amount for withdrawal in such services is several dollars. But if you still want to make the first money on the Internet for ice cream, or, conversely, order captcha recognition services, here you are: RuCaptcha, Anti-Captcha , 2Captcha or another similar service.
Add a description
Create carousel
Create carousel
What happens if a search engine or other site asks you to enter text from a picture or find in the group of images those that fit a particular condition? This means that you are faced with captcha - a tool that separates people from cars. We tell you why it is needed, why you are sometimes forced to undergo this test and some more interesting facts about captcha.
The last twenty years, it’s hard to imagine the Internet without captcha: the automated Turing test is used to protect websites from spam, automatic registrations, password selection, cheating. These actions are performed by small programs - bots distributed by scammers. CAPTCHA is also a small program, but it solves another problem: it separates bots from people, as its task will be performed by an ordinary person, but the bot will fail.
Captcha - Russian version of the spelling of the word Captcha, which stands for Completely Automated Public Turing test to tell Computers and Humans Apart.
KWhat does a captcha look like
Most often, this is a set of characters - sometimes meaningful words, sometimes just letters and numbers mixed with special characters. To complicate the reading, various special effects are used: noise, transparency, slight deformation, etc. It is believed that in this case the robot will not be able to "read" the text, and an ordinary person will quickly cope. The second popular option is “behavioral captcha”, when the user needs to perform an action that proves that he is not a bot. Most often, just tick the box next to the phrase "I'm not a robot."
Add a description
Create carousel
Create carousel
There are other ways to separate bots from people:
Google loves to show blocks of 9 images, on which you need to select images with certain images: cars, fire hydrants, pedestrian crossings, etc .;
logical captchaes are popular: solve a mathematical example, select the nth number in a sequence of numbers, enter a word that starts with a certain letter, type a number in the keyboard that is written in letters, and vice versa;
on sites that are adapted for people with low vision, audio captcha is found;
on Facebook, the correct answer for captcha will be the name of the friend shown in the picture;
sometimes tasks are used as captcha where you need to deploy several objects in a row in the correct position.
CAPTCHA does not protect against spam by 100%, but it creates a lot of inconvenience to the person who sends it.
Often, captcha contains pictures with words from scanned books, magazines and newspapers. And Google as a captcha suggests recognizing house numbers and street names photographed by cars as part of the Google Street View project. Interestingly, five years ago Google itself developed an algorithm that correctly recognizes such labels in 99.8% of cases - that is, better than the average Internet user.
ПWhy Google and Yandex ask you to enter captcha
These search engines are accessed daily by millions of users, but bots send more requests. By asking for captcha input, Yandex and Google protect their servers from automatic requests.
Bots (or rather, special programs and services) need information about the positions of certain pages in the search results, sometimes they research keywords or simply click on the results or contextual advertising. The latter, by the way, is done to the detriment of competitors - in order to spend as much of their money allocated on an advertising campaign as possible. Bots are uninteresting and even harm search engines: they waste the computing resources of their servers, steal user information and disrupt the usual operation of ranking algorithms.
Search engines ask users to enter captcha when they notice suspicious activity. For example, Google uses this test in such cases:
You receive too many searches per unit of time;
You register a new mailbox, account on YouTube or other Google service;
You change the password in the service that you used before
You are setting up a connection to your smartphone on Android.
Many users are annoyed that sometimes captcha is so illegible that it has to be entered several times.
Add a description
Create carousel
Create carousel
You will also have to deal with captcha input, if you have installed browser extensions or plugins for keyword analysis, you use the text verification services for uniqueness or determine the ranking of websites in the search results. For example, often the cause of the ill-fated captcha to appear on the screen is the seemingly innocuous RDS Bar plugin for analyzing site performance. He asks for the citation index of the site, the number of pages in the search, the number of backlinks - all this seems extremely suspicious to search engines.
Both Yandex and Google are forced to enter captcha if many requests come from one IP address. This happens in large offices where the Internet is distributed to employees from one IP. To solve the problem, it is enough to ask the management to conduct a separate channel or give a dedicated IP address to those employees whose work involves a regular search of information on the Internet.
PWhy CAPTCHA is becoming more difficult
An outdated captcha written by laymen is a loophole for bots. They can use the information from the pages of the site to answer questions, guess the captcha with a small number of options (up to several hundred), or use the databases to select the correct answer. In the early 2000s, a simple picture or checkmark opposite the phrase "I am not a robot" was enough for a test of humanity.
Add a description
Create carousel
Create carousel
Today, site developers use more sophisticated verification methods that prevent crowds of bots from breaking through.
Captcha is one of the ways to train artificial intelligence (AI). When AI becomes smart enough to solve one problem, it is offered another, more complex one. Now the captcha that Google generates does not just separate people from bots, but watches us, collects information about behavior in standard and not very situations.
On the other hand, such tests still have a limit of difficulty: ordinary people should still be able to easily solve them. That’s why now scientists do not complicate tasks, but make them more humane and universal - such that a resident of any country, a bearer of any culture, language, religious beliefs, etc. copes well with the same captcha.
KHow to make money on captcha
Imagine the situation: you enter captcha several times in a row, and the site still does not agree with the correct answer and considers you a robot. Is that familiar? Fortunately, there is a solution, and one of the types of real earnings on the Internet is built on it. There are sites where users recognize captcha and get paid for it.
Who needs a captcha mass recognition service? The largest category is webmasters who use software to collect statistics on sites, keywords, promote web pages in search results. This software sends captcha to special services, there ordinary people solve it, and then the service sends a response back to the application. One captcha usually takes from 2 to 10 seconds. Such a job is worth a little, it is very monotonous, requires perseverance and certainly will not make you a millionaire. For example, to earn just one dollar, you need to recognize at least 1000 images! And the minimum amount for withdrawal in such services is several dollars. But if you still want to make the first money on the Internet for ice cream, or, conversely, order captcha recognition services, here you are: RuCaptcha, Anti-Captcha , 2Captcha or another similar service.
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