Learn About CAPTCHA

              Learn About CAPTCHA

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1. The No CAPTCHA reCAPTCHA

The No CAPTCHA reCAPTCHA is Google's invention, and it was introduced in 2014, since when it has become commonplace on websites around the world.

2.The Invisible reCAPTCHA

In 2017, Google announced an update to its No CAPTCHA reCAPTCHA in the form of the Invisible reCAPTCHA.

3.Simple Math Problem

Most people know the answer to a simple math problem like "3 + 8." However, when such a problem is presented as a CAPTCHA, it's surprisingly difficult for spam bots to crack.

4.Simple Word Problem

Similar to the math CAPTCHA, this option involves using a simple word problem to baffle the bots while being reasonably easy for humans to solve.

5.The Honeypot Method

The Honeypot CAPTCHA method is popular because it does not involve any interaction on the part of the user, meaning the user experience is not affected.

6.Social Account Sign-In

More sites are now providing users with the option of signing up using their social accounts, and this might be a good option for your site.

7.Confident Captcha

Confident Captcha is another image-based CAPTCHA that has been developed by Confident Technologies, and it claims to have a 96% solve rate.

8.Sweet Captcha

Sweet Captcha provides another variation on the CAPTCHA, this time trying to make it fun for the user. It works by presenting a selection of images and then asking the user to complete a simple challenge.

9.Time-Based CAPTCHA
Time-based CAPTCHAs work on a simple principle. This system simply times how long it takes for a user to fill out a form, and from this it can judge whether the user is a human or a robot.

10.Biometrics

As technology improves, new types of CAPTCHAs are likely to be developed, and one of these could come in the form of biometrics.

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