Dear fellow Lightning Network developers, given the congestion problems with channels (aka jamming) that we are facing and the various proposals and ideas that are floating around I thought I quickly notify you that the TOR project has introduced a dynamic proof of work system together with a market based auction system for bandwidth via a priority queue to fight DoS attacks [0]. While our problems differ I think there are still enough similarities to justify the relevance of this mail.
In their technical document [1] they mention that their new patch cannot defend against a large botnet and suggest that anonymous credentials [2] among other techniques should be investigated. Personal comment: I am a bit surprised that while they obviously looked at Bitcoin they seemed to not have seriously considered to just use Bitcoin (for example via Lightning Network paywalls) or a mining protocol directly. Instead they argue that the auction based bids are more suitable than a static difficulty target as used in bitcoin. However IMHO the dynamic properties of their auction mechanism could easily have been achieve by the amount of sats being offered instead of a dynamic proof of work solution. With kind regards Rene Pickhardt [0] https://blog.torproject.org/introducing-proof-of-work-defense-for-onion-services/ [1] https://gitlab.torproject.org/tpo/core/torspec/-/blob/main/proposals/327-pow-over-intro.txt [2] https://lists.torproject.org/pipermail/tor-dev/2020-March/014198.html
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