Hey Reader, I am Ishika Doshi from Techwebx.com
Many times you signup for any website, especially Google, you come across Captcha. And it brings questions in your mind. That why they ask me whether I am a robot or not? How could the robot fill the form with my details? And many similar questions.
Don’t worry; I will help you to understand that What is Captcha and Why is it so important for websites to use!
You may have heard about IRCTC. The site with the help of which you can reserve the tickets for your trip. And you also know about the Tatkal ticket, where you can get the reservation before a day.
Now suppose you want to book tickets for 2 from Tatkal. And the time for booking starts from 2:00 pm. You are sitting and waiting for clocks to be 2 since 10 am. The moment the booking site opened.
You immediately, opened the website, filled the details, and chosen the train and set the dates. The time you went for payment, the tickets were not available. Within 2 to 3 minutes, all the tickets were sold.
If here, I would be good enough in coding, then I would have asked my Robot or my coding to do the booking process for me. I would have written the script and left everything on my coding or robot.
What would be the profit of this was, as soon as the time starts for booking, my coding has been able to book the tickets within 10 seconds, and I would have got 2 tickets for me.
Here, the problem would be that if everyone does this, then it can be unfair with the one who was waiting so long, and other than this, it could be harmful to the website. Because the moment time started for booking, within a minute, tickets got sold.
So this was a global question for all the website creators and used that
How to recognize whether the visitor is human or robot?
And there, the captcha was introduced. CAPTCHA means Completely Automated Public Turning test to tell Computers and Humans Apart.
This was introduced to check whether the I’D created is by a human or by Robot to protect the websites from the spam. Because using coding, it was very easy to make thousands of IDs within a second, which was harming the websites.
How does Captcha work?
Captcha gives some words with the noise in the background. These words are only read by the human eye and not the computer. In a way, it was easy to figure out the difference between Humans and Robots.
It was updated after some time with a thought of why to show some meaningless words to the user. So ReCaptcha was created. Here, all the books of varieties were made read by the software or computer, and the words, which were not able to recognize by computers were selected to be shown in Captcha. In short, words from books were added to Captcha.
While this was going on, Google made its step infield and bought the Recaptcha company. And tried to make it easier for filling captcha. Because it was quite annoying for the users to every time fill the captcha.
The time, Google was busy finding an easy way. Many companies in the market made it a source of income wherein people ask to fill the captcha for others in exchange for money.
Meanwhile, Google made it away. They brought no captcha, ReCaptcha in which you have to just right-click on ” I am not a Robot”. Once you click it and then right-click is inserted, you go to the next page.
You might be wondering that How it can clarify Human and Robot. This can even be done by a Robot too.
So yes, this can also be done by Google. But when you click, you give Google many other pieces of information such as, your Ip address, yo location, the way you clicked the right tick, the way you moved your mouse, for how many seconds you were on that page.
Everything is noticed by the Google robot and then based on your working structure, Google allows you for the next page. If Google felt for even 5% that you are not human, then they will ask you other questions like, click on the bus you can see in pictures, click on the roads you can see in pictures. This takes a human eye to answer the questions. And in a way, Google avoided the Captcha from the site.
This was an easy captcha where you don’t need to type anything, just click and done.
How can it be helpful for you?
Suppose you have a website where you are giving a form or a detailed structure to the visitors so that they can provide the details to you if your competitor wants to take you out of the race. Then they can set a coding that will result in a second fill your server with all the false information and details, which can even crash your server.
To avoid all these harmful things on your website you can use captcha today, to avoid any mess in the future.
So I hope I cleared your doubt about capture. What is it and How it works. I hope it was helpful and meaningful for you to read.
Thank You so much for reading so far.