4 ms·

Surely the spare word allows the dictionary of potential CAPTCHA words to add a new word for every CAPTCHA solved (sure they probably run them past many users f

by Robadob 11y ago

Surely the spare word allows the dictionary of potential CAPTCHA words to add a new word for every CAPTCHA solved (sure they probably run them past many users for validation purposes). This effectively allows the CAPTCHA service's dictionary to scale/evolve continuously, preventing an anti-CAPTCHA service from 'learning' the whole dictionary. I thought this was the entire point of re-captcha, so regardless of the 'time necessary to complete' element, their case doesn't seem very well thought out.

kuschku 11y ago
The issue about this is that it is already being targeted in Antitrust suits, too. Why? because Google, through their almost-monopoly in some areas (including captchas) has gotten an unfair advantage in computer vision. I personally would prefer if Google would be forced to publish any training data and parameters for neural networks that were trained with data created by the public.
user_0001 11y ago
anti captcha (against recaptcha) works via captcha farms, the biggest being deathbycaptcha.com. $10 gets you about 10k solved captchas. They work quite well. I tend to get about a 1 out of 5 correct of the squiggly words, whereas the service is more like 4/5 I am not aware of any successful dictionary attack on recaptcha. And the only OCR techniques to bypass recaptcha was by xrumer[0] but that was a few years ago [0]xrumer: once popular forum spamming software waned in popularity / effectiveness in recent years
- mchahn 11y ago
  deathbycaptcha.com is ... > A hybrid system composed of the most advanced OCR system on the market, along with a 24/7 team of CAPTCHA solvers. An average response time of 11 seconds,... My understanding is that this is mostly humans in third-world countries staring at a screen and working for peanuts (or maybe less than the value of a peanut). I don't see how any system for recognizing humans can succeed against real humans.

by Robadob 11y ago

kuschku 11y ago

The issue about this is that it is already being targeted in Antitrust suits, too. Why? because Google, through their almost-monopoly in some areas (including captchas) has gotten an unfair advantage in computer vision. I personally would prefer if Google would be forced to publish any training data and parameters for neural networks that were trained with data created by the public.

user_0001 11y ago

anti captcha (against recaptcha) works via captcha farms, the biggest being deathbycaptcha.com. $10 gets you about 10k solved captchas. They work quite well. I tend to get about a 1 out of 5 correct of the squiggly words, whereas the service is more like 4/5 I am not aware of any successful dictionary attack on recaptcha. And the only OCR techniques to bypass recaptcha was by xrumer[0] but that was a few years ago [0]xrumer: once popular forum spamming software waned in popularity / effectiveness in recent years

mchahn 11y ago
deathbycaptcha.com is ... > A hybrid system composed of the most advanced OCR system on the market, along with a 24/7 team of CAPTCHA solvers. An average response time of 11 seconds,... My understanding is that this is mostly humans in third-world countries staring at a screen and working for peanuts (or maybe less than the value of a peanut). I don't see how any system for recognizing humans can succeed against real humans.