The funny thing is the ReCaptcha is actually piggy backing difficult OCR of old texts while also doing a human test. So, if Recaptcha is ever “broken”, they would be solving a significant machine learning problem that would help libraries and text archives world wide.

Posted at 6:33 pm on Jan 23rd, 2009 by johnny

jDownloader has this function as well along with other features

Posted at 6:44 pm on Jan 23rd, 2009 by blimey

hosts*

Posted at 6:45 pm on Jan 23rd, 2009 by blimey

it is somewhat simpler to use less restrictive uploading sites. I never was as big of a fan of MegaUpload as, say, WillHostForFood.

Posted at 6:58 pm on Jan 23rd, 2009 by Lord Taco

@johnny ReCaptcha shows you a word it knows and a word it doesn’t, so they’d only need to solve the known word. Zero gain for ReCaptcha.

Posted at 7:12 pm on Jan 23rd, 2009 by Eliot Phillips

They’ll just have to start using the Voight-Kampff test.

Posted at 8:12 pm on Jan 23rd, 2009 by joe57005

It’s a OCR neural network captcha decoder…in Javascript…at 486 lines of code. My.mind.is.blown.

I’m just now getting dialog boxes and stuff to draw out in JS and this guy’s building an effing Skynet with it in less lines of js then you see in your average cheesy AJAX page.

Posted at 9:14 pm on Jan 23rd, 2009 by realyst

Megaupload’s captcha wasn’t particularly mind blowing in terms of character obscurity in the first place. A normalised cross correlation filter could do the job just as easy.

I have to say, ShaunF’s little neural network code is pretty cool. However, I can see a couple of problems with the neural network approach.

Neural networks need a training data set (eg. the Megaupload’s captcha images) in order to pre-calculate the weights required for image recognition.

Its classification reliability will be heavily dependent on the choice of training data. Basically there is a danger of over training, or the neural net becoming too specialised for a particular training data set. In such cases, it would be easy to defeat the neural network by simply changing the CAPTCHA images in a significant way. Realistically speaking, it doesn’t take much effort to change a CAPTCHA font – for example.

Also, neural networks trained with a much broader data set will have more false positives and false negatives during recognition. Very fiddly.

Anyone hoping to break Recaptcha in a similar way will have to wait for a few more decades, I’m afraid.

Posted at 10:03 pm on Jan 23rd, 2009 by Tachikoma

It uses a neural network, huh? That’s some impressive stuff

Posted at 6:18 am on Jan 24th, 2009 by Timothy

Hi,

I was trying to bypass the 40 seconds in megaupload.

Apparently it’s a var who contains the seconds left and change name at each page loading. (looks like x2850, x45698, x76954, …) so I made a greasemonkey script to automaticly find this var name, wich it does but I can’t change his value …

If someone thinks he can help me or just wana check out the source : ilycode@gmail.com

$bad_english = true;

Posted at 6:31 am on Jan 24th, 2009 by Chuck Norris

Chuck, that timer is just a client side refresh. The real timer is server side, and can’t be changed.

Posted at 7:34 am on Jan 24th, 2009 by cde

ha ok … too bad …

but anyway why can’t I access to his value ?

alert(” end => “+end+”\r\n this[end] => “+this[end]);

this returns

end => x5258
this[end] => undefined

And also I red the sources of the captcha thing … it’s mad !

And THX

Posted at 8:05 am on Jan 24th, 2009 by Chuck Norris

Using javascript? Try this.end

Posted at 8:12 am on Jan 24th, 2009 by cde

returns the same.

but might be because greasemonkey is executed somehow somewhere else than the var I’m tryin to change.

Anyway thx ! And too bad for the server countdown !
Someone knows if this is bypassable ? Like an algo from page id to file id or something like on youtube&co

Posted at 8:50 am on Jan 24th, 2009 by Chuck Norris

@chuck: It sure is. Just sign up for a premium account. ;)

Posted at 9:40 am on Jan 24th, 2009 by Skyler Orlando

@eliot True, but words which were unknowns to OCR are then later used as known samples once enough users identify the same unknown word. Hence, their method is still fairly secure.

Posted at 10:33 am on Jan 26th, 2009 by falcolas

http://www.megaupload.com/?d=105FDGDT

small easy exe hack to update your info, to seem as if you are a premium account user. New, beta, version 1.5

Posted at 7:10 pm on Feb 5th, 2009 by hack

you know they changed how the captchas are now since this came out :P

Posted at 8:56 am on Mar 9th, 2009 by amjadk

I am not much of megaupload fan, and it seems to me that at rapidshare in general and at one of its search engines ( http://rapidqueen.com )in particular there are no such bugs.

Posted at 7:39 am on Mar 23rd, 2009 by Kate

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creating account on paypal is possible without a credit card.
just skip credit card process.
All you need is a email id.
click below:
$6.00 Welcome Survey After Free Registration!

or past in browser
http://www.AWSurveys.com/HomeMain.cfm?RefID=Dexobox
(please do not remove my reffrel id)

pls help me i have to get at least 75 ppl to sign up.So even if you dont want to earn just sign in.

Posted at 7:00 am on May 12th, 2009 by dexobox

It uses a neural network, huh? That’s some impressive stuff [2]. It’ make me remember the jokes in images about “how will be the new rapidshare captcha”.

Posted at 9:54 am on Sep 29th, 2009 by Megaupload Search