On Sat, Aug 16, 2025 at 6:08 PM Matthew Petach via NANOG < [email protected]> wrote:
> On Sat, Aug 16, 2025 at 5:47 PM John Levine via NANOG < > [email protected]> > wrote: > > It appears that Matthew Petach via NANOG <[email protected]> said: > > >I think we should take a cue from cryptocurrencies, and have a "proof of > > >stake" type of > > >challenge for email messages sent out. The recipient machine doesn't > > >accept a message > > >until the sender has demonstrated they have put some skin in the game as > > well. > > > > Dwork and Naor invented that in 1992. Clever idea, doesn't work in > > practice. > > > > https://www.wisdom.weizmann.ac.il/~naor/PAPERS/pvp.pdf > > > OK, I read the paper through, and they put considerably more thought into > the calculation side; > however, this paper explicitly calls for a centralized Pricing Authority, > which is exactly what I'm > advocating *against*. > > And this would, in my opinion, be why it's a non-starter. You'll never get > a system > that requires everyone to adhere to dictates from a central authority. > > Instead, I'm advocating for a decentralized, one-at-a-time type approach, > where the penalty box is in the time domain, so it's easily implemented > unilaterally by the receiving side. It's the very opposite of what the > paper you're citing proposed. > Pretty sure what you're proposing is the equivalent of Hashcash? https://en.wikipedia.org/wiki/Hashcash Damian _______________________________________________ NANOG mailing list https://lists.nanog.org/archives/list/[email protected]/message/CNIBTYPQLRO7JCXPFMN5MUGXQXITXKNJ/
