Steve Schear wrote:

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.




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