[hashcash] Re: Hashcash performance improvements

  • From: Hubert Chan <hubert@xxxxxxxxx>
  • To: hashcash@xxxxxxxxxxxxx
  • Date: Sun, 30 May 2004 16:24:19 -0400

>>>>> "Malcolm" == Malcolm Howell <hashcash@xxxxxxxxxxxxxxxxxxx> writes:

[...]

Malcolm> Also, if you're concerned about the leading zeros which are
Malcolm> guaranteed to be in the SHA-1 hash of a valid stamp, you could
Malcolm> hash the stamp without including the counter.

Yes, or add a salt (e.g. add an extra '0' or other known character at
the beginning, or some other similar perturbation).  It shouldn't be too
hard to work around, as long as you always do it in a consistent way.

-- 
Hubert Chan <hubert@xxxxxxxxx> - http://www.uhoreg.ca/
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