What is wrong with the real questions that requre human input? One can
connect with all that way
We are talking about a solution that does not require captcha in my book,
but that is just me.
Karen
On Wed, 9 Nov 2011, Chris Blouch wrote:
So you're asking about people who have both audio and vision impairment? It's
a bit tougher case which would probably best be handled by a third party
out-of-band authentication service like http://www.authentify.com/. If you
can't see images or hear audio, anything else you do in the browser is going
to get cracked.
CB
On 11/9/11 2:14 PM, Red.Falcon wrote:
Hi Chris!
But of course quite a few people have a hearing impairment!
And have said the audio capture is bad for them!
What the solution for security is to get around this is going to be
difficult!
Colin
On 9 Nov 2011, at 19:01, Chris Blouch wrote:
> My usual rules of thumb for CAPTCHA which work at Internet scale are:
>
> 1. Algorithmically generated puzzles which are hard for algorithms to
> solve (one-way transforms)
> Likewise, puzzles which are reasonably possible for real people to
> solve
> 2. Puzzles which do not require localization
> 3. Puzzles which are not susceptible to brute force attacks (high random
> success rates)
>
> That said, it should be obvious that swirled character image captchas
> will not work for those with vision impairments but this is easily
> remedied with an audio version. Audio and image recognition are pretty
> much the two areas that algorithms have trouble with. Common solution is
> multiple people speaking on top of each other. Hard for algorithms to
> crack but not impossible for real people. Playback using Sound Manager 2
>
> http://www.schillmania.com/projects/soundmanager2/
>
> does the heavy lifting to select native html5 or flash for the audio and
> do it in a way that works for all browsers. Other than that they just
> have to make sure that the audio play button is easily found in the tab
> order and, once pressed, moves focus to the text input. Not much else
> needed beyond that.
>
> CB
>
> On 11/8/11 6:57 PM, Karen Lewellen wrote:
> > Hi folks,
> > For reasons that are complicated to explain I have the ear of the
> > legal department at paypal -ebay. Part of the reason is that, as some
> > of you may know, they are *requiring* all users to agree that that
> > they read pdf files, or they will lose their account. Because of this
> > and some other access issues with paypal and ebay, i have been asked
> > to document why things like pdf and captcha are issues for those using
> > adaptive tools. I have told them already that to assume everyone is
> > using jaws is impractical, and that still browsers like lynx, with its
> > recent edition dated June 2011, are good foundations for access. I
> > have shared that pdf reaains a hurtle, and captcha is flat out an
> > issue, as is stuff like flash.
> > because they are serious though I want to make maximum use of this
> > opportunity. What I would welcome is article information, places that
> > discuss why pdf for example and captcha remain barriers. Likewise
> > posts from you if you have met with issues with either service would
> > be welcome. I want them to fix this for everyone, not just sweep me
> > under the corporate rug. That they are shifting all document
> > responsibility t the end user is disturbing, since if you have an
> > issue say with security, you will bare the blame for any discrepancies
> > in documentation.
> >
> > Additionally, if part of your professional life is access, share under
> > your professional umbrella. If I get enough research responses, i
> > will construct a solid document for them, and include as many other
> > people as I can.
> > Thanks in advance,
> > Karen
> >
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