For a coinjoin to work, you also have to be anonymous to the coordinator and, above all, on the network layer, otherwise it is useless.

This is especially necessary in centralized coordinators.

Wasabi, for example, while not perfect, is on another level because it divides various aspects of the coordinator into different Tor circuits so that they are not related to each other.

That's why I was curious to see how the people at Samourai criticized Wasabi when, from a technical point of view, it was much better.

In the case of Wasabi, different identities are used for:

- Synchronizing the wallet with the backend (indexer) and downloading filters
- Downloading blocks when a filter “hits”
- Broadcasting transactions
- CoinJoin (WabiSabi): separating identities by role and by input/output.

For the latter:

- A Tor identity “Alice” for each input in the registration phase, and a new Alice in each round, not linked to others.
- In the output register, it generates “Bob” identities that are not linked to any Alice, so that the coordinator cannot link “input ↔ output.”

In Samourai, the same Tor circuit was used for everything.