Re: Going from simple to super CAPTCHA

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At 6:19 PM +0200 6/12/07, Tijnema wrote:
On 6/12/07, Robert Cummings <robert@xxxxxxxxxxxxx> wrote:
On Tue, 2007-06-12 at 12:01 -0400, Robert Cummings wrote:
 On Tue, 2007-06-12 at 11:56 -0400, Robert Cummings wrote:
 >
 >
 >     (10000 * 100) / 1000000 = .10 = 10% of the time

 Bad math alert... (10000 * 100) / 1000000 = 10    ;)

 Still the same answer though, was just mixing what I wrote with what I
 was thinking :)

Bleh, what's wrong with me today... it's 1% not 10%. Still within reason
for a spammer.

*smacks head to clear the fog*

Cheers,
Rob.

So, that means that you need to allow maximum of 10 attempts per few
minutes, so that there will be 0,1% change ;)


Also, I wasn't thinking about just one test. For each additional test the odds for success reduce by 99 percent. In other words, 1 test = 1 percent, 2 test = .1 percent, 3 test = .01 percent -- at what point would not be within reason for spammy?

Would it be too much to ask the user to click three times? I dunno, but for myself, I would rather find something and click it three times than to decipherer and enter several screwy letters.

Cheers,

tedd
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