Improve privacy for Blinded Message Paths using Dummy Hops#3726
Merged
valentinewallace merged 6 commits intolightningdevkit:mainfrom Aug 29, 2025
Merged
Improve privacy for Blinded Message Paths using Dummy Hops#3726valentinewallace merged 6 commits intolightningdevkit:mainfrom
valentinewallace merged 6 commits intolightningdevkit:mainfrom
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Resolves #3252
This PR improves privacy in blinded path construction by introducing support for dummy hops.
While blinded paths obscure node identities, they still might reveal the number of hops—potentially leaking information about the distance between sender and receiver.
To mitigate this, we now prepend dummy hops for
BlindedMessagePaths, that serve no routing purpose but act as decoys. This makes it significantly harder to estimate the true position of the destination node based on path length.