Jeff Barr wrote:
I am getting lots of good reports on my simple "Turing Test" system:
http://www.syndic8.com/~jeff/blog/index.php?p=103
I simply prompt for my first name, and verify that it is there. If
not, I issue a simple message.
The user (if they are not a comment spammer) can simply press Back and
try again.
The only problem I see with this system is that it forces the users to
enter a non-related piece of information to prove they're not a robot.
I think that more sophisticated methods would check the client "in the
background," transparently. You could imagine testing for keyboard and
mouse strokes, or a client-side computation in flash or jscript, or any
number of inobtrusive things.
Thanks,
Elliott C. Bäck
--------------------
www.spreadIE.com
www.elliottback.com
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