31–40 of 70 posts
That's more impressive than it sounds. I'm pretty sure 70.78% is more accurate than I am with reCAPTCHA manually. A lot of the captcha's presented are very fuzzy, or have ambiguous questions, etc.
I have used services like 2captcha.com, to get solving costs down to $0.5-$1 per 1000 solved captchas. Googles reCAPTCHA is hardly an effective solution... Also if google wanted to they could just automatically verify people without you clicking that checkbox. Because at the end of the day they already know if they are going to auto-verify you, or make you pass a test.
Just like with DRM, captchas only seem to punish legitimate users and perhaps very small-time bad actors.
I don't work on reCAPTCHA but I imagine they could easily + significantly beef up image captcha by adding adversarial image examples that trip up would-be automators.
Note that adversarial examples generalize across models. Meaning a good adversarial example will work against SVMs, convnets, etc just the same.
If you're interested in the basics of how it works, Julia Evans has a great post: jvns.ca/blog/2015/12/24/how-to-trick-a-neural-network-into-thinking-a-panda-is-a-vulture
The key is that deep neural nets are actually very (piecewise) linear and that makes them susceptible to adversarial training.
Using the Google's own reverse image search to break an image-based captcha. Simple, but brutal.
Thought the same thing, that's ironic /and/ smart
I am the only one who thinks google reCAPTCHA is just a tool that Google uses to train Machine Learning Algorithms? First it was used to help Google learn how to Read, now its learning to detect object, landscapes, ...
I am the only one who thinks google reCAPTCHA is just a tool that Google uses to train Machine Learning Algorithms? First it was used to help Google learn how to Read, now its learning to detect object, landscapes, ...
I am the only one who thinks google reCAPTCHA is just a tool that Google uses to train Machine Learning Algorithms? First it was used to help Google learn how to Read, now its learning to detect object, landscapes, ...
I have a bad feeling CloudFlare is going to break the internet for Tor users with impossible-to-solve CAPTCHAs again after this...
Not that it can become much worse than it already is, though. The current reCAPTCHAS are already "fuck this shit"-inducing on Tor.
I am the only one who thinks google reCAPTCHA is just a tool that Google uses to train Machine Learning Algorithms? First it was used to help Google learn how to Read, now its learning to detect object, landscapes, ...
The little captcha box does some processing before deciding what to show you. If you look suspicious, it can show you a more complex challenge. If you look like a normal browser, it might show you a house number to read (to improve its Maps product maybe). If you already have a cookie set because you already proved you're human, maybe it's just that check-box that says "I'm a human".