What about hashcash for webmention spam (not Vouch)? Pass time_t & nonce, where sha256(target+time+nonce).startswith("000000") /cc @aaronpk
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@sil There's been some discussion about that on the webmention page: indiewebcamp.com/Webmention#… (aaron.pk/r4ZP2)
Nov 29, 2014 · 9:46 PM UTC