Microsoft publicly announces Penny Black PoW postage project

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?

steve

BTW, Penny Black stamp was only used briefly.  It was the Penny Red which 
was used for decades. 

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