Under shortest-path routing in payment channel networks, any balance-revealing noise mechanism must satisfy the privacy-utility inequality Π ≤ 1 - U, and this bound is asymptotically tight.
Secure and privacy-preserving communication in hybrid ad hoc networks
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Privacy-Utility Tradeoffs in Routing Cryptocurrency over Payment Channel Networks
Under shortest-path routing in payment channel networks, any balance-revealing noise mechanism must satisfy the privacy-utility inequality Π ≤ 1 - U, and this bound is asymptotically tight.