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Are You a Robot? Introducing “No CAPTCHA ReCAPTCHA”

googleonlinesecurity.blogspot.com

31–40 of 442 posts

Re: Are You a Robot? Introducing “No CAPTCHA ReCAPTCHA”

#31
post #18

Earlier quoted context omitted.

It probably uses a LOT more info than only the mouse move/mouse click. Remember, google tracking is embedded in probably 99% of websites you visit so from your ip, cookies, tracking, logged in Google profile, etc... they're able to know if you're a human or not.

So if I don't have a Google account or allow their cookies in other sites then I'm not a human anymore?

Nothing as dramatic : if you don't have a strong Google footprint, it is less likely that the system will recognize you automatically as human, and you'll have to answer the picture question.

Re: Are You a Robot? Introducing “No CAPTCHA ReCAPTCHA”

#32
post #19

I wish they would explain more about how the user interacts with the whole reCAPTCHA leads them to know it's a person and not a robot, but maybe they're worried about people writing bots to get around their protections.

> However, CAPTCHAs aren't going away just yet. In cases when the risk analysis engine can't confidently predict whether a user is a human or an abusive agent, it will prompt a CAPTCHA to elicit more cues, increasing the number of security checkpoints to confirm the user is valid. Probably using a combination of G+ and GA to check your 'history' to see the activity is like a normal human. Visits a couple news sites e…

I was thinking they may be looking at how long it takes for a user to click the "I'm not a robot" link. A robot would probably load the page and quickly, without delay, send the HTTP POST but I have to imagine they thought of this already and bots writers would quickly add a sleep() call in there at some point... Yea, I wonder about their internal logic too.

Re: Are You a Robot? Introducing “No CAPTCHA ReCAPTCHA”

#38
post #18

Earlier quoted context omitted.

It probably uses a LOT more info than only the mouse move/mouse click. Remember, google tracking is embedded in probably 99% of websites you visit so from your ip, cookies, tracking, logged in Google profile, etc... they're able to know if you're a human or not.

So if I don't have a Google account or allow their cookies in other sites then I'm not a human anymore?

Not from Googles point of view, probably...

Re: Are You a Robot? Introducing “No CAPTCHA ReCAPTCHA”

#40
It seems like they're using cursor tracking to validate human-ness. Assuming thats the case: Since the cursor is outside of javascript's control, it would force the attacker one level higher (to the browser/os, instead of the dom). Not impossible, but still a significant barrier.
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