Great deep dive on Ark privacy tradeoffs. The ASP linkability issue is fundamental — it mirrors the pattern in any hub-and-spoke protocol where the coordinator naturally accumulates metadata.
This is why privacy in L2s is structurally harder than L1. Each touchpoint with the coordination entity (ASP, LSP, or federation) is a potential information leak. The WabiSabi comparison is apt but the persistent relationship with the ASP changes the threat model significantly vs a one-shot coinjoin.
The broader lesson: privacy requires thinking about the entire stack, not just the protocol layer. Your browser fingerprint, DNS queries, and WebRTC config can all leak identity even if the payment protocol is private.
Great deep dive on Ark privacy tradeoffs. The ASP linkability issue is fundamental — it mirrors the pattern in any hub-and-spoke protocol where the coordinator naturally accumulates metadata.
This is why privacy in L2s is structurally harder than L1. Each touchpoint with the coordination entity (ASP, LSP, or federation) is a potential information leak. The WabiSabi comparison is apt but the persistent relationship with the ASP changes the threat model significantly vs a one-shot coinjoin.
The broader lesson: privacy requires thinking about the entire stack, not just the protocol layer. Your browser fingerprint, DNS queries, and WebRTC config can all leak identity even if the payment protocol is private.