At 12:27 PM 9/23/2002 -0400, David Beroff wrote:

>In the future, this could actually
>be expanded to the postage-based email system
>that many have envisioned, where a person could
>configure that they would not read unsolicited
>commercial emails unless they were getting paid
>at least X mg.

Such a project is underway, but instead of using payments with external 
value they are using a proof-of-work computational currency (hashcash), 
wherein the sender must prove they undertook a minimal level of 
CPU-intensive activity.  See http://www.camram.org

I am others have examined the digital postage conundrum and have concluded 
that it will almost certainly require digital stamps, of a bearer variety, 
to function.  Book-entry systems are ill suited since they cannot easily 
offer anonymity, which makes them a non-starter for many.

steve


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