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Author Topic: CAPTCHA!  (Read 4994 times)

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Offline Blaze

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CAPTCHA!
« on: March 05, 2008, 08:50:33 am »
http://www.codinghorror.com/blog/archives/001067.html

Quote
In November 2007 I called these three CAPTCHA implementations "unbreakable":

Google
(unbreakable)


Hotmail
(unbreakable)


Yahoo
(unbreakable)



08 is shaping up to be a very bad year indeed for CAPTCHAs:

    * Jan 17: InformationWeek reports Yahoo CAPTCHA broken
    * Feb 6: Websense reports Hotmail CAPTCHA broken
    * Feb 22: Websense reports Google CAPTCHA broken

[More]

Heh, I don't like captchas too much, either, but I agree with him that they're kind of necessary.  So.. now that the best of them are broken, what happens?
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Offline Newby

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Re: CAPTCHA!
« Reply #1 on: March 05, 2008, 09:34:16 am »
Good riddance to Hotmail. I can hardly read some of those letters. :P
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[17:32:45] * xar sets mode: -oooooooooo algorithm ban chris cipher newby stdio TehUser tnarongi|away vursed warz
[17:32:54] * xar sets mode: +o newby
[17:32:58] <xar> new rule
[17:33:02] <xar> me and newby rule all

Quote from: Rule on June 30, 2008, 01:13:20 pm
Quote from: CrAz3D on June 30, 2008, 10:38:22 am
I'd bet that you're currently bloated like a water ballon on a hot summer's day.

That analogy doesn't even make sense.  Why would a water balloon be especially bloated on a hot summer's day? For your sake, I hope there wasn't too much logic testing on your LSAT. 

Offline iago

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Re: CAPTCHA!
« Reply #2 on: March 05, 2008, 09:48:29 am »
Yeah, CAPTCHAs are a broken paradigm. I'm interested to see what'll come next. :)
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Offline d&q

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Re: CAPTCHA!
« Reply #3 on: March 05, 2008, 01:48:43 pm »
Hm, it seems to me that all this technology being developed to break CAPTCHAs could be put to very good use...like converting image eBooks to text.
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Offline Newby

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Re: CAPTCHA!
« Reply #4 on: March 05, 2008, 04:58:30 pm »
Quote from: Deuce on March 05, 2008, 01:48:43 pm
Hm, it seems to me that all this technology being developed to break CAPTCHAs could be put to very good use...like converting image eBooks to text.

Carnegie Mellon did something similar in a project. It presented two CAPTCHA words: one was a CAPTCHA, and the other was a word out of an old physical book, and if the first one registered as correct, the second one was (assumed to be) correct as well, and if the second word was "correct" enough times, it was removed and cycled with another word.
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Quote
[17:32:45] * xar sets mode: -oooooooooo algorithm ban chris cipher newby stdio TehUser tnarongi|away vursed warz
[17:32:54] * xar sets mode: +o newby
[17:32:58] <xar> new rule
[17:33:02] <xar> me and newby rule all

Quote from: Rule on June 30, 2008, 01:13:20 pm
Quote from: CrAz3D on June 30, 2008, 10:38:22 am
I'd bet that you're currently bloated like a water ballon on a hot summer's day.

That analogy doesn't even make sense.  Why would a water balloon be especially bloated on a hot summer's day? For your sake, I hope there wasn't too much logic testing on your LSAT. 

Offline abc

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Re: CAPTCHA!
« Reply #5 on: March 05, 2008, 05:02:52 pm »
It'd also be wicked cool if you could just scan a paper, and have it show up on the screen in an editable word document. :)
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Offline Sidoh

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Re: CAPTCHA!
« Reply #6 on: March 05, 2008, 05:04:58 pm »
Quote from: Dale on March 05, 2008, 05:02:52 pm
It'd also be wicked cool if you could just scan a paper, and have it show up on the screen in an editable word document. :)

http://en.wikipedia.org/wiki/Optical_character_recognition
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Offline Blaze

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Re: CAPTCHA!
« Reply #7 on: March 05, 2008, 10:30:22 pm »
I've always wanted to work on a CAPTCHA solver, but I haven't had time yet.
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Offline iago

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Re: CAPTCHA!
« Reply #8 on: March 05, 2008, 10:49:02 pm »
I wrote one once, a really simple one that used some statistical stuff. It worked about 10% of the time on my friend's CAPTCHA, which was enough to win me a free lunch. :D
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Offline Joe

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Re: CAPTCHA!
« Reply #9 on: March 06, 2008, 03:22:32 am »
Theres no such thing as a free lunch.
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Quote from: Camel on June 09, 2009, 04:12:23 pm
I'd personally do as Joe suggests

Quote from: AntiVirus on October 19, 2010, 02:36:52 pm
You might be right about that, Joe.

Offline Camel

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Re: CAPTCHA!
« Reply #10 on: March 07, 2008, 02:03:04 pm »
I'd imagine using a sans-serrif font alone would help to throw a captcha solver.
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