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Re: sign up security:

From: Steve Carter <steve@juggler.net>
Date: Mon, 28 Jan 2002 15:48:02 -0000
To: "wai-ig list" <w3c-wai-ig@w3.org>
Message-ID: <DAV40sxf4yp8ARf3sll000007d7@hotmail.com>
Tis a tricky one, because the aim of the technique is to prove that you are
a human, so you have to pick something that a human can do that a machine
cannot.  The thing that humans are good at is filtering and discerning.
Trouble is if they pick something you can't detect, then you might as well
be a solid block of lead from the POV of that test.

The image is necessarily low contrast and noisy, because the problem of
recognising characters is not really a hard one any more, so they've added a
filtering dimension too.

IMO (come back to me if you disagree) being offered an alternative of
listening to a noisy .wav would include a lot more individuals and would be
in principle the same test.

----- Original Message -----
From: "David Poehlman" <poehlman1@home.com>
To: "wai-ig list" <w3c-wai-ig@w3.org>
Sent: Monday, January 28, 2002 3:36 PM
Subject: sign up security:

> One thing in this area that seems to becoming more popular and that
> completely stopps accessibility if you cannot utilize images is the use
> of an image that you are directed to transcribe as presented into an
> edit box to validate that you are a live human being filling out the
> form.  I know that yahoo has talked about looking into ways to fix this
> problem but the only solutions I have seen so far are to call the site
> or to send them an email so that can call you back or to listen to a
> .wav file, none of which provide parity.
> Hands-On Technolog(eye)s
> touching the internet
> mailto:poehlman1@home.com
> voice: 301.949.7599
> http://members.home.com/poehlman1/
Received on Monday, 28 January 2002 10:50:33 UTC

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