Unfortunately no mention of safenet though…
Space & Time: How BitTorrent’s Creator is Attacking Bitcoin Waste
According to Cohen, any alternative to this system would need to be based on a proof of something less power-demanding.
“The only other resource to use for that is storage. So, that results in the theoretical possibility of proofs of space, where you allocate storage capacity to do this stuff,” Cohen said.
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To be fair, this idea didn’t originate with Cohen. In fact, a white paper by another research team explains how a cryptocurrency based on proof of space, dubbed SpaceMint, would work in practice.