Microsoft publicly announces Penny Black PoW postage project
Ben Laurie
ben at algroup.co.uk
Sat Dec 27 08:22:15 EST 2003
Steve Schear wrote:
> http://news.bbc.co.uk/2/hi/technology/3324883.stm
>
> Adam Back is part of this team, I think.
>
> Similar approach to Camram/hahscash. Memory-based approaches have been
> discussed. Why hasn't Camram explored them?
They were only invented recently, and indeed, I've been planning to
introduce them to the camram arena. I wonder if they're being discussed
as a result of the pub conversation I had recently with a Microsoft
person on this very subject?
One major advantage of memory-based proof-of-work over hashcash is that
the variation between machines is much smaller (estimated to be a factor
of 4 from slowest to fastest PCs, for example).
BTW, for those who don't know, SpamAssassin now supports hashcash.
Cheers,
Ben.
--
http://www.apache-ssl.org/ben.html http://www.thebunker.net/
"There is no limit to what a man can do or how far he can go if he
doesn't mind who gets the credit." - Robert Woodruff
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