CAPTCHA stands for C<\/b>ompletely A<\/b>utomated P<\/b>ublic T<\/b>uring test to tell C<\/b>omputers & H<\/b>umans A<\/b>part.<\/li>\n

Originally, these tests used images that contained a combination of simple-yet-distorted alphabets & numbers.<\/li>\n

So, while humans could read the text from the image, the bots couldn\u2019t pick different characters from it, as the software had not evolved enough to {tooltip}break down images{end-text} For e.g., let\u2019s say you have a picture of your car\u2019s number plate that reads ABC 123; if you were to write this text on a piece of paper, you could do it, but if you tried searching (Ctrl+F) for ABC on this image, the computer will not show any results.{end-tooltip}.<\/li>\n

Eventually, however, the character recognition software evolved and it became easier for some programs (bots) to identify characters on the image.<\/li>\n

In 2014, it was reported that computers got the CAPTCHA test right 99.8% of the time.<\/li>\n

So, an advanced version in the form of the \u201cI am not a robot\u201d checkbox came to the scene, and it was named reCAPTCHA.<\/li>\n

This technology had been acquired by Google in 2009 and, for obvious reasons, the full details on how it works have never been disclosed.<\/li>\n

Tech experts, however, have developed an indicative list of how reCAPTCHA works.<\/li>\n

First, it tracks the movement of the mouse, i.e. if the movement to the checkbox is \u2018too smooth and quick\u2019 or \u2018too slow\u2019, it is a red flag, and reCAPTCHA would give you a few images (crosswalks or traffic lights, etc.) to click, before letting you in.<\/li>\n

Similarly, when you are asked to click on images containing traffic lights, you would usually stop for a few seconds before making the selection,\u00a0unlike bots, who would do this in milliseconds.<\/li>\n

So, it can be said that Google is more interested in how you interact with the page and may not care too much about your ability to find every slide containing a traffic light.<\/li>\n

Google also takes into consideration your recent activity online.<\/li>\n

So, if you misspelled a word in your search a few minutes ago, or if you had been clicking different links for some time finding a pair of shoes, the checks would be far less stringent.<\/li>\n

In short, the more \u2018less than perfect\u2019 behaviour you exhibit, the easier your entry becomes.<\/li>\n

However, with fast-paced advancements in technology, this is seen as an ongoing race, and reCAPTCHA will have to keep evolving to remain ahead of the bots.<\/li>\n<\/ol>\n
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