Coinjoining is weak privacy via obfuscation (vs encryption). The range of connections and amounts are all still visible. Can be unraveled with more data or user mistakes.

Lightning sender privacy is decent. Reciever privacy is bad and amounts can be derived.

"We identified 27,183 private channels, discovered hidden balances, and showed how a passive adversary can infer payment endpoints with very high probability."

https://arxiv.org/pdf/2003.12470.pdf

Liquid only hides amounts. The transaction graph is still visible. And it is a permissioned network. Among many other problems.

https://twitter.com/Truthcoin/status/1689337656319016960

Ecash is great privacy - better than anything above. But unfortunately Ecash is custodial and rehypothecatable.

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