📅 Original date posted:2021-09-20
📝 Original message:
Good morning SomberNight,
> Solutions:
>
> 1. Naively, we could just derive a static key to be used as
> payment_basepoint, reused between all our channels, and watch the
> single resulting p2wsh script on-chain.
> Clearly this has terrible privacy implications.
If the only problem is horrible privacy, and you have an `OP_RETURN` identifying the channel counterparty node id anyway, would it not be possible to tweak this for each channel?
static_payment_basepoint_key + hash(seed | counterparty_node_id)
This (should) result in a unique key for each counterparty, yet each individual counterparty cannot predict this tweak (and break your privacy by deriving the `static_payment_basepoint_key * G`).
?
Regards,
ZmnSCPxj
ZmnSCPxj [ARCHIVE] /
npub1g5…3ms3l
2023-06-09 13:03:45
in reply to nevent1q…lvl0
Author Public Key
npub1g5zswf6y48f7fy90jf3tlcuwdmjn8znhzaa4vkmtxaeskca8hpss23ms3lPublished at
2023-06-09 13:03:45Event JSON
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"content": "📅 Original date posted:2021-09-20\n📝 Original message:\nGood morning SomberNight,\n\n\n\u003e Solutions:\n\u003e\n\u003e 1. Naively, we could just derive a static key to be used as\n\u003e payment_basepoint, reused between all our channels, and watch the\n\u003e single resulting p2wsh script on-chain.\n\u003e Clearly this has terrible privacy implications.\n\nIf the only problem is horrible privacy, and you have an `OP_RETURN` identifying the channel counterparty node id anyway, would it not be possible to tweak this for each channel?\n\n static_payment_basepoint_key + hash(seed | counterparty_node_id)\n\nThis (should) result in a unique key for each counterparty, yet each individual counterparty cannot predict this tweak (and break your privacy by deriving the `static_payment_basepoint_key * G`).\n\n?\n\nRegards,\nZmnSCPxj",
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