[15060] in cryptography@c2.net mail archive
Re: Microsoft publicly announces Penny Black PoW postage project
daemon@ATHENA.MIT.EDU (Ben Laurie)
Sun Dec 28 12:19:05 2003
X-Original-To: cryptography@metzdowd.com
X-Original-To: cryptography@metzdowd.com
Date: Sat, 27 Dec 2003 13:22:15 +0000
From: Ben Laurie <ben@algroup.co.uk>
To: Steve Schear <s.schear@comcast.net>
Cc: cryptography@metzdowd.com, cypherpunks@lne.com,
camram-spam@camram.org, Adam Back <adam@cypherspace.org>
In-Reply-To: <6.0.1.1.0.20031226091014.05a89888@mail.comcast.net>
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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