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> Requiring strong proof that the message is authentic before sending

"Before Sending" is the lynchpin here.

The receiver needs to be performing verification, and have the ability to blacklist sources.

Which requires distributed infra.

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Some sort of chain... of blocks, that would require distributed consensus before the message would go out? Hmm...
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Yep.

I had a go at trying to sketch out a protocol for this years ago, that was low enough level to be actually mildly censorship resistant and also pay out for middle men successfully routing traffic and there was something like 10-100 times more protocol traffic on network than actual packets. It was a mess.

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But did it work?
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