[hashcash] Re: stamp collisions

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On Mon, 30 Aug 2004, Jonathan Morton wrote:

To eliminate collisions entirely, a "sender=..." extension field would be advisable. This reduces the chance of collisions to 1 in 2^48 stamps produced by any particular sender, even if they only have a medium-quality RNG. 
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if the problem is creating a "good" seed, just using information about the user as part of the seed could help greatly...

sha1(bob@xxxxxxx)   = fe0c37fc36608e33b3505f5eda7cc01975ad77b2
sha1(alice@xxxxxxx) = 2224ac0f1cf51c601bcb5f9b9da8527d404abe92

that looks like fodder for a seed, without making the x-hashcash header bigger.

maybe the double-spend database can be hashed, and used as part of a complete and well balanced seed...?


        ...atom

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