Re: Microsoft publicly announces Penny Black PoW postage project

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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