Re:Proof of work - an unobtrusive alternative to captchas
by JoachimSchipper on Friday May 06, 2011 @06:14AM
(#2520533)
You don't (have to) care about "the smallest", just "any integer with a hash beginning with 0000".
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Re:Proof of work - an unobtrusive alternative to captchas
by tomgallard on Friday May 06, 2011 @06:20AM
(#2520542)
But once the spamming machine has worked that out once, they can submit the same integer every time.
It would be better if the server sent a request saying send me an integer which has a hash beginning with npqr where n, p q and r are all random characters.