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SilasX
on Jan 21, 2014
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Why Bitcoin Matters
I was thinking the same thing. If you want to impose costs on people who send you emails, you can just strip out the proof of work component of bitcoin (which indeed predated it), and use that as a challenge/response system.
sirsar
on Jan 22, 2014
[–]
Implemented in Bitmessage, with free anonymity on the side.
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