Comments on: reCAPTCHA: Using Captchas To Digitize Books

By: BrainsLab.net » Blog Archive » Godel, Escher, Bach: An Eternal Golden Braid book notes

Thu, 21 Aug 2008 20:09:10 +0000

[...] typefaces. He was unusually prescient with that third one, it is the basis behind today’s reCAPTCHA [...]

By: ReCaptcha: το captcha ψηφιοποιεί βιβλία | Webz

ReCaptcha: το captcha ψηφιοποιεί βιβλία | Webz — Sun, 10 Aug 2008 23:47:14 +0000

[...] Η τεχνική Captcha είναι γνωστή. Μπλοκάρει τα bot και αφήνει τους ανθρώπους να περνάνε βάζοντας τους να γράφουν τη λέξη που αναγράφεται στην εικόνα. Το ReCaptcha είναι μια νέα εξαιρετικά έξυπνη υπηρεσία με σκοπό να ψηφιοποιήσει τα “σκαναρισμένα” βιβλία που βρίσκονται στο Internet Archive. Είναι ένα project του School of Computer Science του Carnegie Mellon όπως μας πληροφορεί το Techcrunch. [...]

By: A useful CAPTCHA from reCAPTCHA - Joe Dolson Accessible Web Design

A useful CAPTCHA from reCAPTCHA - Joe Dolson Accessible Web Design — Tue, 22 Jan 2008 21:04:30 +0000

[...] reCAPTCHA on Tech Crunch [...]

By: Neil

Neil — Tue, 16 Oct 2007 09:18:59 +0000

I can assure you small sites (traffic wise) are spammed every single day by spammers an example is our contact form.

I am trying to integrate recaptcha on the form to stop this but am having some difficulty but i will persevers as the form is spammed every single day many times over.

By: Violinits.Com » Comment on reCAPTCHA: Using Captchas To Digitize Books by Fiat Lux …

Fri, 28 Sep 2007 15:21:42 +0000

[...] Janairo, Times Union Features Copy Desk Chief wrote an interesting post today on Comment on reCAPTCHA: Using Captchas To Digitize Books by Fiat Lux …Here’s a quick [...]

By: Fiat Lux » Update on the Spam Front

Fiat Lux » Update on the Spam Front — Fri, 28 Sep 2007 06:36:27 +0000

[...] bit bummed about the outcome, because the captcha plug-in I was using — reCaptcha — is a bit more than your average spam deflector: ReCaptcha is a rather clever service using them to help digitize books scanned into the Internet [...]

By: meneame.net

meneame.net — Wed, 19 Sep 2007 17:21:18 +0000

reCAPTCHA - combatir el spam y digitalizar libros…

Todos sabemos lo que es y para que sirve un "captcha". Bien, reCAPTCHA utiliza imágenes de libros digitalizados que los OCR no son capaces de reconocer de forma automática. Así, además de evitar el spam conseguimos ampliar la cantidad de …

By: Attila Szabó

Attila Szabó — Tue, 18 Sep 2007 15:09:41 +0000

Ben,
CAPTCHA could be an appropriate solution to protect sign up forms of popular web sites, I agree. But the bottom line is that CAPTCHA is not necessary for contact forms of less popular web sites. No spammer would invest time into attacking a single contact form, it has no sense.

By: Ben Maurer

Ben Maurer — Tue, 18 Sep 2007 14:49:01 +0000

Attila,

What Fred is saying is that the spammers attacking your site aren’t doing anything more than their standard automated attack. Many webmasters find that there are spammers (and other abusive persons) who are making a effort to attack their site specifically. In this case, a secure technique is needed.

The idea behind reCAPTCHA is that we choose a challenge which we know current technology can’t beat. A site using reCAPTCHA is secure against an attacker who actively targets that site.

By: Attila Szabó

Attila Szabó — Tue, 18 Sep 2007 14:32:16 +0000

Fred, you are wrong. My contact form is submitted at least 3000 times a month and I’ve not received any SPAM yet. I store form fields of the submitted form into a database and log the IP address of the spammer. The page is spammed by at least 20 different spammers. One of the spammers submits the form 400 times each month. I’ve banned his IP adress recently to save traffic. If you need details I can send you the database. None of the spammers could figure out the correct answer yet.

By: Larry Rains

Larry Rains — Mon, 17 Sep 2007 19:30:31 +0000

So you finally got to reading back issues of Wired magazine? I thought TechCrunch was about breaking stories.

By: Phil McT

Phil McT — Mon, 17 Sep 2007 18:28:46 +0000

It’s ‘centuries’ and ‘fulfils’.

Do I win?

By: Fred Brotzman

Fred Brotzman — Mon, 17 Sep 2007 17:27:01 +0000

Attila, your solution only works because nobody else uses it and because spammers have not targetted your site. If somebody had an acutal incentive, it is trivial to write a program than can answer the questions you propose. CAPTCHAs are built to protect sties even if dedicated spammers target them.

By: Attila Szabó

Attila Szabó — Mon, 17 Sep 2007 17:21:01 +0000

I do not use CAPTCHA. I have a bullet proof alternative to CAPTCHA and it is less annoying and has no accessibility issues.
http://w3net.eu/?p=32

By: Stephen Lev

Stephen Lev — Mon, 17 Sep 2007 15:34:53 +0000

Pretty interesting… but the captchas it produces are tough!

By: share.websitemagazine.com

share.websitemagazine.com — Mon, 17 Sep 2007 14:32:44 +0000

reCAPTCHA: Using Captchas To Digitize Books…

ReCaptcha is a rather clever service using them to help digitize books scanned into the Internet Archive as well. It’s a project from the School of Computer Science at Carnegie Mellon….

By: Steve

Steve — Mon, 17 Sep 2007 14:28:54 +0000

It takes about 3 clicks (click into their website and try a captcha) to figure out that they do a different thing for audio captchas…

By: SearchPartner

SearchPartner — Mon, 17 Sep 2007 14:15:38 +0000

Great concept. I tried using it on my site, but was very slow and non-responsive. May be I’ll go back if it improves.

BTW, if CAPTCHA is machine scanned text, how can you provide audio for the CAPTCHA words? Does a human read and digitize those? Then it defeats the the very purpose of humans helping digitize books, right?

By: Derrick

Derrick — Mon, 17 Sep 2007 12:20:02 +0000

This is a great idea! Just wonder how they manage to catalogue all these data that has been entered. Must be a really huge database some where.

By: Michael W

Michael W — Mon, 17 Sep 2007 11:16:33 +0000

I think it is a little unfair that Techcrunch does not hat tip people that guide them to the stories behind their articles. About 15 hours ago I thought they did, when I sent them the link to reCAPTCHA and I had already written about it on my blog…

By: Guillaume

Guillaume — Mon, 17 Sep 2007 10:37:05 +0000

Ok, I should have tried before asking, it reads out something entirely different and barely understandable.

By: Guillaume

Guillaume — Mon, 17 Sep 2007 10:32:21 +0000

Avi : Yes, that’s how it works according to their website.

I was wondering how it could read out a new word?

By: The Credence Dot Com

The Credence Dot Com — Mon, 17 Sep 2007 08:39:40 +0000

A little offtopic -

Just few days back I too had covered reCaptcha on our blog. I still have to test is on my wordpress blog though. I find akismet good enough to find spam hence don’t feel like adding captcha functionality

By: Avi Bar-Zeev

Avi Bar-Zeev — Mon, 17 Sep 2007 06:05:58 +0000

Maybe Ben can answer this. I never understood how this system would know the correct answer for the first person to receive a new unknown word. It can’t. So you always have to ask twice — give one word the system doesn’t yet know and one it does. And because of possible entry errors, the unknown word would have to be redundantly given to some number of people.

If that’s true, then why not just ask one CAPTCHA and ask people to volunteer 10 seconds of their time digitizing a new word? Why pretend the CAPTCHA is two words?

By: steve jabs

steve jabs — Mon, 17 Sep 2007 05:37:08 +0000

This has been around for a while now! I love the coverage of it, and I honestly think it is a very noble cause, but it’s a bit late to be covering it I think. We’ve been using it for quite a little while now on 20DC.com. But keep with it. Anything local to Pittsburgh and CMU I am very happy!