What’s wrong with PoW?
Halseth is making an *actual* proposal for zk channel announcements in LN gossip! :
https://delvingbitcoin.org/t/zk-gossip-for-lightning-channel-announcements/1407/
This topic has fascinated me for the last couple years. LN has a kind of unique position to blaze the trail of creating pure cost based, fully private, anti Sybil/DOS of the type that every privacy network needs.
(Disclaimer: I don't believe PoW works, long term, for anything outside of bitcoin. Probably. )
Discussion
Specialization, mainly. You want the cost per unit to be fixed for all users.
If the PoW scheme requires the user to commit to some user id in the hash, would that satisfy specialization?