Interesting! Although PTLCs suffer from this attack: https://bitcoin-problems.github.io/problems/ptlc-cycle-jamming.html
I believe that adaptor signatures and PTLCs would fix latest Lightning vulnerability. This is because in HTLCs all the payments use the same preimage and hashlocks, but in PTLCs each is bonded to a different secret, so any entities cannot retrieve the information about payments by just controlling multiple nodes in a payment paths.
Also it would lower the fees as they uses less block space while increasing security and privacy.
What do you think, when we will see PTLCs used with Bitcoin and Lightning as they're now allowed by Taproot and Schnorr signatures?
https://www.nobsbitcoin.com/how-does-a-lightning-replacement-cycling-attack-work/
#Bitcoin #Lightning #LightningNetwork #HTLC #PTLC #Taproot #Schnorr
Discussion
I wonder if this PTLC attack could be mitigated by using ZKPs to “Prove payment path is cycle-free” … maybe something to explore in the future when ZKPs become cheaper to produce with accelerated hardware & advanced folding schemes.
Interesting also, haven't heard about PTLC cycle jamming before, have to read more about how it works. Thanks for pointing this out!