Benjamin Marsh

Domain Specific Post Quantum Signatures for Blockchains

Blockchains need more than post quantum single signer signatures. They need consensus profiled authentication objects with canonical bytes, priced invalid input rejection, stable transaction identifiers, hybrid downgrade resistance, public aggregation, merge semantics, accountable signer evidence, forward secure commit...

This paper is included in the Proceedings of the 20th USENIX Symposium on Operating Systems Design and Implementation.

Coexistence of Shill-Proof and Non-Shill-Proof Equilibria in a Public Auction

A single auction can have both a shill-proof equilibrium and a non-shill-proof equilibrium in the model of Komo, Kominers, and Roughgarden. We give an explicit single item example with three bidder positions, publicly observed actions, positive winning prices, and a strictly regular i.i.d.\ value distribution. Real bid...

Finality Before Disclosure for Ledger Authenticators in the Quantum Random Oracle Model

A joint ledger and quantum random oracle execution model in which quantum state persists across classical finalization cuts and oracle evaluations made through the ledger are charged is defined.