[NFBCS] Automatic Captcha solving

[Peter]

Good afternoon everyone,

	Some captchas contain a checkbox labeled "I'm not a robot" whichyou
must check to authenticate yourself as a human. If all of these types of
captchas worked the way they're supposed to this is a very viable means of
insuring blind persons can authenticate themselves as human and able to
solve the captcha without sighted assistance, third party captcha solvers
that don't always work,  or paying several hundred dollars for a computer
technician to help you set up an account where traditional captchas are in
use. Even when the "I'm not a robot" checkbox is in use we've encountered
captchas that still want you to enter a code to solve the captcha. This
should not happen if one checks the checkbox to authenticate themselves as a
human being. If the program or website includes keypress detection this
should be the test to be sure it's a human not another machine that's trying
to gain access to the resource in question.

Peter Donahue

 

-----Original Message-----
From: NFBCS <nfbcs-bounces at nfbnet.org> On Behalf Of Joseph C. Lininger via
NFBCS
Sent: Monday, March 29, 2021 1:25 PM
To: NFB in Computer Science Mailing List <nfbcs at nfbnet.org>
Cc: Joseph C. Lininger <joe at pcdesk.net>; Curtis Chong
<chong.curtis at gmail.com>
Subject: Re: [NFBCS] Automatic Captcha solving

Hi Curtis,
I know you already know the answer to your rhetorical question, but I am
going to answer it anyway for those who don't understand why using OCR to
solve captchas isn't going to happen.

The entire point of a captcha is to prevent automated systems from
interacting with a page. If OCR or any other automated technology could be
used to solve the captcha, there would be no point in using one. If a blind
person could use OCR to solve it, so could any other automated system
incorporating OCR technology. The same thing goes for any other automated
solution one might come up with for the solution of captchas. 
In fact, captchas are specifically designed to be hard to solve by automated
means. For example, the ones that require you to enter a code you see on the
screen have the code blurred, in funny fonts, or otherwise obscured in a way
that makes it hard for automated systems to recognize the characters. Most
captchas today do have an audio option that you can use as an alternative to
the visual captcha. You might argue that this is harder than just using an
automated solution, and you're right, it is. That's the point though; the
captcha is designed to explicitly require human interaction in order to
proceed.
Joe

On 3/29/2021 1:42 PM, Curtis Chong via NFBCS wrote:
> Hello:
>
> If OCR can crack a CAPTCHA, doesn't this kind of defeat the purpose of 
> the CAPTCHA?
>
> Cordially,
>
> Curtis Chong
>
> -----Original Message-----
> From: NFBCS <nfbcs-bounces at nfbnet.org> On Behalf Of Jonesy Cee via 
> NFBCS
> Sent: Monday, March 29, 2021 10:58 AM
> To: NFBCS at nfbnet.org
> Cc: Jonesy Cee <jones.cee7 at yahoo.com>
> Subject: [NFBCS] Automatic Captcha solving
>
> Has anyone had luck with using a screen reader such as orca and 
> implementing a script, plug-in or application to automatically solve 
> captchas using OCR or Voice recognition? Here is an example of what I 
> am talking about, although I would really like to find an option that 
> works purely with optical character recognition (OCR).
>
> https://github.com/dessant/buster
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