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Re: Alternate for Captcha - Need suggestions

From: Ramón Corominas <listas@ramoncorominas.com>
Date: Thu, 08 May 2008 19:43:57 +0200
Message-ID: <48233BDD.4030505@ramoncorominas.com>
CC: w3c-wai-ig@w3.org

I think negative captchas are a very interesting approach to reduce 
spam. Of course it's not perfect, but introduces another step to 
difficult bots' job and it's also an usability improvement, as users 
don't have to fill an annoying test-field.

Another step could be to randomize the variable names for the form 
fields, using session vars to track them, although this method would not 
allow auto-complete systems to work.


> I don't remember where I read it, but I remember an excellent article 
> from a year or two ago advocating something like "negative captchas".
Received on Thursday, 8 May 2008 17:43:42 UTC

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