Have you ever been surfing the internet you come across one of the these boxes that says I AM NOT A ROBOT.
then you check the box and it let you go…
But how come that box come to you that you are a robot or not and why does it matter, well the answer is that we actually have start with this : CAPTCHA
Turing test to tell
it was invented in 2003 by Luis Von Ahn and his resercher team in Carnegie Mellon University,
the whole idea behind to invent this is to stop spam on internet like preventing programs who writes himself in fraction of a seconds and their idea worked because humans can read the disorted text and computers and robots can’t.
So if you want to stop bots from buying tickets or setting up email addresses we just have to make a filling out a CAPTCHA part of process. So fast forward and now million of CAPTCHA are being solved every single day by day on internet users and Von Ahn on started to think can we do something usefull with this great power?
And answer to this is yes and this is what we are doing, So they decided to use that brain power to digitize every single physical book we have and the way to do that is to take real physical books, scan them, and then use opticle charracter recognition software to translate the words in to digital text. What they did was take any words that were too hard for the computer to decipher and upload them into the reCAPTCHA database.
So Going forward , instead of showing random distorted text, CAPTCHA started to show words from the book that computer couldn’t understand and when enough people on the internet solving these CAPTCHAs Wrote the same word for a piece of text shown, that word would be confirmed and uploaded to an ebook database.
Von Ahn called this project ReCAPTCHA. Their slogan was “stop spam, read Books”. At this point, a hundred million reCAPTCHA were being solver every day, the equivalent of 2.5 Million Books/year. So google was like Lets acquire reCAPTCHA and they did. in 2009, and they used that brainpower to digitize all the new york time archives since the 1800s as well as all google books. and when they ran out of those google started giving street numbers google street view to help label google maps.
So Everything around worked out happily ever after, but not really, because they were a couple of problems
The first is that even trough reCAPTCHA work, they weren’t too accessible, so blind people had a much harder time filling up form and signing up for the things on the internet. So they made audio reCAPTCHA
But regardless, reCAPTCHA became a burden for people with dyslexia, poor hearing, poor sighting, as well as other sensory impairments.
the other problems was that the paid services stared popping up that solved CAPTCHA for you. the service work because they took your CAPTCHA and shipped them Off to CAPTCHA farms in the third-world countries, where workers would be paid dirt cheap to solve your CAPTCHA and ship them back to you, the client and the last problem, which is perhaps the most important, was that computer vision technology was becoming so good that bots were started to solve these CAPTCHA and get through. So engineers got to thinking and thought “Why not make CAPTCHA harder to solve?” So they made CAPTCHA have more twists and turns and added some noise and threw in random lines, but as time went on the technology caught on and the bots were once getting through. So google decided to do some research and they found the humans got theses complex complicated captions right?
So they come with this NoCAPTCHA reCAPTCHA, When you click it, it sends over an HTTP request to google with a bunch of useful information things like your IP Address, your country, A time stamp, how you scrolling the page, how you move your cursor, and many other variables that google will keep secret. All these criteria are then processed by a machine learning risk analysis engine at google and most of the time the information can tell the difference between humans and bots. but if the risk analysis engine fails then small amount of users will complete an addition challenge An image recognition CAAPTCHA Something like picking up an image deals with store front or picking up street sign on the image and if you prove that that you are human then changes will be remember by google engine and next when click that check box you will able pass right through.
This is how it all works, we hope this content was useful, Do Share you thought comments section.