Internet

What is Captcha? | Why Do Use Captcha Codes On Websites?

notarobot captcha

Captcha Codes, Remember the good old times when the internet was run by humans and used by humans. Well, it is still run by humans but we now have robots using it too. As cool as it may sound from a science fiction point of view, it is a little dangerous for the internet. To tackle this problem, we have captcha.

google captcha code widget

We are going to talk about Captcha and its types, Also where you can get them from for your website.

What is Captcha?

CAPTCHA is an acronym for Completely Automated Public Turing test to tell Computers and Humans Apart. Captchas help in determining if the user performing some action on a particular website is a robot or human.

Why do we need it?

The modern web is a lot more than just a handful of websites. Every comment, retweet, new account created on a website matters. This is why people started using bots(automated scripts) for spamming websites.

These bots are programmed in a way that they repetitively run over and over again doing the same task as if a human were doing them. We know that every time we do something on any website, we are actually interacting with its server. In response, the server needs to provide the requested information which can be a simple image or it can be a login request. Now, this is a huge problem. Isn’t it? To solve this, we needed to verify if the user making those requests was human or not. This is where captcha comes in.

Types

Initially, there was the only type of captcha test, the one where you were shown an image that had the random alphabet and you had to type them correctly.

captcha random words test

But with advancements, several new forms emerged, out of which the most famous one would be google’s reCAPTCHA v2. This version had a more sophisticated approach in distinguishing humans and robots apart.

google recaptcha v2

It requires you to select all images from the listing which contain a particular element.

math Captcha Codes

There are some other types as well, like the one where you are told to solve a math problem or a general question is asked.

Get captcha for my website

If you want captcha for your website, there are many sources you could get it from however google provides free services under reCAPTCHA. You could get reCAPTCHA v1 or v2 from there.

recaptcha

Conclusion

In a world where bots are being used to perform attacks and spams on various web services, captcha is really useful. Various types are used to determine if the user is a human or not. Google’s reCAPTCHA is a free and easy solution for using captcha on your site.

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