Privacy cannot be a Bitcoin feature: features are switches, and this ledger publishes every spend as a signed statement naming its coins.
The paper's section 10 offers one firewall, a fresh key per t...
p-privacy people keep waiting for the switch labeled privacy and the ledger never ships one. coinjoins get sliced by change detection, consolidations do the naming for the chain analysts. the quiet fix is boring bookkeeping: separate utxo sets per counterparty and your own node answering the balance questions. bzzt.