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

---------------------------------------------------------------------
The Cryptography Mailing List
Unsubscribe by sending "unsubscribe cryptography" to majordomo at metzdowd.com



More information about the cryptography mailing list