At 3:39 PM +0200 4/5/07, Tijnema ! wrote:
Yes, but using a too hard protection where it isn't needed makes
people irritated and they will hate your site. If you're using more
then 1 CAPTCHA program on a simple board for example. But if you have
a site like the NSA, yes, then it wouldn't be very strange to use 10
different CAPTCHA programs.
Tijnema
Tijnema:
I sent this to Daevid off-list because I was trying not to continue a
topic that is not specifically php, but instead deals with a problem
that may be solvable/mitigated by a php script (I know very thin
thread there to keep this php related).
However, I like my dot captcha (been fixed for IE 5 & IE 6) , see:
http://sperling.com/examples/dot-captcha/index.php
As you can "see", it's only for sighted users.
Using that type of captcha coupled with asking questions (such as
click the green dot while presenting several different colored dots)
and providing several captchas in session to pass, could raise the
level of security quite high while not inconveniencing the user too
much -- or so I think.
Remember, spam bots have no information as to what to present for
entry and visual recognition routines would have a lot of trouble
with these as my imagination and coding can change with much less
effort. It makes for an interesting problem.
Cheers,
tedd
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