Resources on Lightning privacy

PreviousResources for Core Lightning NextVPN tunnels

Last updated 1 year ago

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Resources on Lightning privacy

Receiver privacy with

lnproxy takes a bolt 11 invoice and generates a “wrapped” invoice that can be settled if and only if the original invoice is settled. The “wrapped” invoice has the same payment hash, expiry, and description, as the invoice it wraps but adds a small routing fee to the amount. The “wrapped” invoice can be used anywhere the original invoice would be used to trustlessly hide the destination of a payment.

use the in your .bashrc (available in the Raspiblitz v1.9.0 and above with a CLI shortcut as well):

function lnproxy() {
  echo
  echo "Requesting a wrapped invoice from http://rdq6tvulanl7aqtupmoboyk2z3suzkdwurejwyjyjf4itr3zhxrm2lad.onion ..."
  echo
  torify curl http://rdq6tvulanl7aqtupmoboyk2z3suzkdwurejwyjyjf4itr3zhxrm2lad.onion/api/${1}
}

Code and how to run yourself:
Improved alias verifying the payment hash:

Unannounced channels - shadow liquidity

use parallel private channels to hide capacity and UTXOs
To hide public channel balances, a node may open unannounced channels in parallel to announced ones. Depending on the relation between the balances of announced and unannounced channels, the attacker may still be able to discover unannounced channel balances (e.g., if the balance of the unannounced channel exceeds the balances of announced channels). Even in that case, the standard probing technique needs to be modified

Open channels with improved privacy

Manual

create channels from coinjoin outputs
- private channels are not announced, use them especially if there is a public channel to the peer already
- open one channel at a time
- create no change
- avoid round amounts
close cooperatively to an external address (eg a Joinmarket wallet running as a Maker))

syntax for LND with Balance of Satoshis:

bos open PUBKEY --amount SATS --coop-close-address EXTERNAL_ADDRESS --type private --external-funding

Mutiny wallet

LDK / Sensei based
a new node for every channel open
fund channels with an external wallet and no change

LN-vortex

Nolooking

Payjoin to channels. The receiver of a paymant can open channels in a payjoin.

LN wallets

Mobile wallets (LN node on the phone)

Tor support and private chain info

OBW - Tor + Electrum server support
- optional custodial hosted channels support - payments are private from the provider
Breez - Tor and neutrino backend
Blixt - Neutrino block source

Custodial wallets

Traditional custodians provide no privacy from the maintainer.

Wallet of Satoshi
Bitcoin Beach Wallet (phone number required)
CoinOS (Liquid compatible LN <-> Liquid gateway)

LN compatible chaumian (blinded) mints

Fedimint with LN gateways - WIP

LN protocol improvements

Attacks

Channel jamming

LNsploit

Probing

Reading list

Make Lightning Payments Private Again (PLN)

Onion routing

BOLT #4: Onion Routing Protocol https://github.com/lightning/bolts/blob/master/04-onion-routing.md https://github.com/ellemouton/onion/blob/master/docs/onionRouting.pdf
Route Blinding proposal https://github.com/lightning/bolts/blob/route-blinding/proposals/route-blinding.md https://github.com/ellemouton/onion/blob/master/docs/routeBlinding.pdf
CLI tool for constructing & peeling onions both with and without route blinding. https://github.com/ellemouton/onion

Listening and videos

PreviousResources for Core Lightning NextVPN tunnels

Last updated 1 year ago

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