Domain: recaptcha.net
Stories and comments across the archive that link to recaptcha.net.
Comments · 68
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Possible problem
I did that protect your email address with OCR thing at http://mailhide.recaptcha.net/ and tried solving it myself. I mistyped one of the words accidentally and noticed a second after I hit enter. It said 'Congrats you're a human!' and proceeded to give me the address.
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Give it a go!
You can try it out at the top of this page.
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Re:I want to participate...
Here's the website, http://recaptcha.net/
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Re:DNSBL for comment spammers?
I came across this but haven't tried it yet: http://www.bad-behavior.ioerror.us/ and of course, there are other interesting ways to prevent submissions: http://recaptcha.net/learnmore.html
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Help the Internet Archive w/reCAPTCH
If your web site uses captcha, you get spam from posting your email address online, or you just want to help out the Internet Archive's book project, check out recaptcha. It's a captcha based around helping recognize difficult-to-OCR scans.
-snarkbot -
Recaptcha is great
I switched to recaptcha, which uses OCR'ed texts to validate. Ever since I switched I don't get the automated spammers signing up. There are plugins for various languages and bulletin board sytsems (such as phpbb). It has a side-benefit of correcting OCRed public domain books.
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Re:Quick!there's an article in this month (or last month) WIRED about using CAPCHAs and such. CAPCHA2 will have 2 words: the first one is a CAPCHA, and the second one is an unidentified word (scanned) from an ebook project (can't remember which one). It not only helps defeat bots, but helps with cataloging the world's books! You're probably thinking of http://recaptcha.net/. Creative commons license, free to use, helps Project Gutenberg... pretty good stuff.
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Re:!you can't solve them ; machine canMaybe that can help with the supershredder:
Reminds me of that somewhat bizarre subplot in Vinge's latest novel "Rainbow's End" where there was a big project to digitize all the university libraries, and some guy came up with the fastest way to do it: just throw all the books into a giant shredder, and then gave lots of cameras taking pictures of every last bit from every andle as it comes blowing out the other end...then re-assemble it all in a computer.
And the experimental captcha program is out there, let me go find the link.
* reCaptcha
* Distributed Proofreaders- not captchas, but entire pages. -
Re:!you can't solve them ; machine can
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Re:Official reCAPTCHA site
There needs to be a I don't know button as well
There is. If you take another look you'll note there's a button to reload it and get a new one, as well as one to get an audio challenge. :) -
Missed opportunity
From the security page of the reCAPTCHA site: "if somebody writes a program that can read our distorted images, we can add more distortions in very little time"
If someone can write a program to solve the distorted images of OCR-unreadable words, don't you just hire that guy to do your OCR and get out of the CAPTCHA business? -
Re:Verification?
http://recaptcha.net/security.html the words are additionally distorted and they add lines and warps so that a computer cannot read it.
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Re:Verification?
"But if a computer can't read such a CAPTCHA, how does the system know the correct answer to the puzzle? Here's how: Each new word that cannot be read correctly by OCR is given to a user in conjunction with another word for which the answer is already known. The user is then asked to read both words. If they solve the one for which the answer is known, the system assumes their answer is correct for the new one. The system then gives the new image to a number of other people to determine, with higher confidence, whether the original answer was correct."
http://recaptcha.net/learnmore.html -
Re:Verification?from the website
:: http://recaptcha.net/learnmore.html"But if a computer can't read such a CAPTCHA, how does the system know the correct answer to the puzzle? Here's how: Each new word that cannot be read correctly by OCR is given to a user in conjunction with another word for which the answer is already known. The user is then asked to read both words. If they solve the one for which the answer is known, the system assumes their answer is correct for the new one. The system then gives the new image to a number of other people to determine, with higher confidence, whether the original answer was correct."
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Official reCAPTCHA site
I originally missed the link to the official site - D'oh. The article also doesn't mention that the system is already in use! http://recaptcha.net/
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Better links
The article is lacking some information. Here are some better links:
Official reCAPTCHA site
Hide your email address with reCAPTCHA (super easy!)
A more detailed blog post about how the system works
Disclaimer: I work with Luis von Ahn, who's the professor running the reCAPTCHA project. -
Better links
The article is lacking some information. Here are some better links:
Official reCAPTCHA site
Hide your email address with reCAPTCHA (super easy!)
A more detailed blog post about how the system works
Disclaimer: I work with Luis von Ahn, who's the professor running the reCAPTCHA project. -
Re:Verification?
From recaptcha.net: "But if a computer can't read such a CAPTCHA, how does the system know the correct answer to the puzzle? Here's how: Each new word that cannot be read correctly by OCR is given to a user in conjunction with another word for which the answer is already known. The user is then asked to read both words. If they solve the one for which the answer is known, the system assumes their answer is correct for the new one. The system then gives the new image to a number of other people to determine, with higher confidence, whether the original answer was correct."