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That's been attempted for email too, not sure how far it ever went. https://en.wikipedia.org/wiki/Hashcash https://en.wikipedia.org/wiki/Hashcash
by simcop2387 4y ago
That's been attempted for email too, not sure how far it ever went. https://en.wikipedia.org/wiki/Hashcash https://en.wikipedia.org/wiki/Hashcash