diff --git a/bip-0159.mediawiki b/bip-0159.mediawiki index 0ca8aa9b..22539220 100644 --- a/bip-0159.mediawiki +++ b/bip-0159.mediawiki @@ -42,6 +42,10 @@ A safety buffer of additional 144 blocks to handle chain reorganizations SHOU Full nodes following this BIP SHOULD relay address/services (addr message) from peers they would connect to (including peers signaling NODE_NETWORK_LIMITED_*). +=== Counter-measures for peer fingerprinting === + +Peers may have different prune depths (depending on the peers configuration, disk space, etc.) which can result in a fingerprinting weakness (finding the prune depth through getdata requests). NODE_NETWORK_LIMITED supporting peers SHOULD avoid leaking the prune depth and therefore not serve blocks deeper then the signaled NODE_NETWORK_LIMITED_* thresholds. + === Risks === Pruned peers following this BIP may consume more outbound bandwidth.