BOT OR NOT? Why can’t bots check ‘ I am not a ro­bot’ check­boxes?

Technowize Magazine - - The Nerdist -

Click­ing the ‘i am not a ro­bot’ is an in­con­se­quen­tial part of what those CAPTCHAS are ac­tu­ally look­ing for. The CAPTCHAS are usu­ally look­ing for things like:

Did the user in­stantly move their mouse to the ex­act co-or­di­nates of the CAPTCHA box, or did he scroll through the en­tire page?

is the user re­motely ex­e­cut­ing javascript to trig­ger a scroll to the box? How long after the page load did the user find the CAPTCHA box?

Now, here comes the tricky part: tak­ing too long to find the box is a red flag. but so is find­ing it too quickly. Gen­er­ally, to get around the RE­CAPTCHA, one needs to find out 4 – 5 dif­fer­ent ar­eas to click in ad­di­tion to the first click. Most users use CAPTCHA ser­vices, which are real peo­ple solv­ing them and re­turn­ing the an­swer for you. it usu­ally doesn’t take a hu­man more than 5 min­utes to an­swer a few CAPTCHA ques­tions. if you take too long to an­swer, they’ll make you do another im­age check chal­lenge.

usu­ally, it’s very dif­fi­cult to make a bot move the mouse, scroll and re­act to a page load like hu­mans do. Even if it man­agers to fool RE­CAPTCHA, it’ll be asked to do a few more im­age check chal­lenges, be­fore it’s blocked from the web­site com­pletely.

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