What is captcha and ReCaptcha | Why websites use captcha and Recaptcha ? >>sidtalk.

what is captcha and recaptcha, what is difference between captcha and recaptcha, what is no captcha recaptcha, captcha and recaptcha, what is the difference between captcha and recaptcha, captcha and recaptcha difference, difference between captcha and recaptcha, what is recaptcha vs captcha,

Why website uses captcha and ReCaptcha.  what is "I am not robot " meaning  and why we saw this. Complete information about captcha and ReCaptcha. sidtalk

What is captcha and ReCaptcha


Before knowing
 what is captcha and ReCaptcha , why websites use captcha , how it's work .
Lets take an example .
Say suppose CAPTCHA is not used in booking railway tickets website and u need a tatkal tickets. As we all know that opening of Tatkal ticket counter is 11 am. For booking of ticket online it take approximately 3-4  minute. If it proceed manually.

suppose some programmer write a web script in which the information required by website is filled automatics .when tatkal tickets counter open someone run that script and books all tickets with in second. You will get nothing in this case . So captcha is used to solve this problem.


What is captcha ?

CAPTCHA's are used for protection against online attacks and automated scripts. CAPTCHA is introduced in 2003 to avoid spammers in internet. CAPTCHA system generates a random string word dynamically on spot and asks user to enter it. Now, programmer

 or spammer can't configure that script to be that much intelligent to read that string. Hence, automated scripts fail in these scenarios. Since , computer does not read text in images.

Why websites use captcha ?


Captcha is used to stop spamming in websites. Suppose if a website is not using captcha while using a contact form. Then spammer can write a code in for loops that help to fill contact form million of times automatically as loop condition is true. Thus a website atabase get full by fake information.

Full of captcha is
Remember myspace? That originally did not have captcha, do you remember what happened? millions of friend requests, millions of messages, comment spam? Captcha sorted most of that out, captcha is to make the website based internet for people, by proving they are human “reverse turing test”. It helps to differentiate between human and bots or scripts.

Who use captcha and ReCaptcha ?

Mainly all online company who use to provide services use captcha to avoid spamming in website . It includes Facebook to avoid automatic creation of fake account Facebook use it own captchas.
All these company use to avoid spamming .Bots can be used to create hundreds of Mail Id's which can be used as a spam mail accounts. In order to prevent this all E-mail based services like Gmail , Yahoo - login use CAPTCHAs to stop bots from creating spam mail accounts.

What is ReCaptcha ?

Captcha had became a company which is buyed by Google in 2009. As people get frustrated by writing string or text again and again. So , Google invented ReCaptcha. It is a simple white box contain a checkbox with a string" I am not a robot".
you have to click on checkbox to verify that you are not robot. In this all the information while performing Recaptcha  goes to Google server information include your IP address, way of behaviour in web page, your cursor movement ,etc. Google uses machine learning language to detect that you are human or not . If Google bots satisfy 80-85% that your not robot  checkbox is simply get green tik and you can process further. If Google bot have   10-15% doubt that you are bot it give you images to select and verify that you are not robot.


So, I hope you will get clear about captcha and ReCaptcha . If you have any complaints or suggestions .please don't be hesitate to comment on comment box.
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Sidtalk - Quality Content Posts, PUBG mobile ,Life hacks, Dark Facts and more.: What is captcha and ReCaptcha | Why websites use captcha and Recaptcha ? >>sidtalk.
What is captcha and ReCaptcha | Why websites use captcha and Recaptcha ? >>sidtalk.
what is captcha and recaptcha, what is difference between captcha and recaptcha, what is no captcha recaptcha, captcha and recaptcha, what is the difference between captcha and recaptcha, captcha and recaptcha difference, difference between captcha and recaptcha, what is recaptcha vs captcha,
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