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We propose an information theoretically secure secret-key quantum money scheme in which the verification of a coin is classical and consists of only one round; namely, a classical query from the user to the bank and an accept/reject answer from the bank to the user. A coin can be verified polynomially (on the number of its qubits) many times before it expires. Our scheme is an improvement on Gavinsky's scheme [Gavinsky, Computational Complexity, 2012], where three rounds of interaction are needed and is based on the notion of quantum retrieval games. Moreover, we propose a public-key quantum money scheme which uses one-time memories as a building block and is computationally secure in the random oracle model. This construction is derived naturally from our secret-key scheme using the fact that one-time memories are a special case of quantum retrieval games.
@InProceedings{georgiou_et_al:LIPIcs.TQC.2015.92,
author = {Georgiou, Marios and Kerenidis, Iordanis},
title = {{New Constructions for Quantum Money}},
booktitle = {10th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2015)},
pages = {92--110},
series = {Leibniz International Proceedings in Informatics (LIPIcs)},
ISBN = {978-3-939897-96-5},
ISSN = {1868-8969},
year = {2015},
volume = {44},
editor = {Beigi, Salman and K\"{o}nig, Robert},
publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
address = {Dagstuhl, Germany},
URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.TQC.2015.92},
URN = {urn:nbn:de:0030-drops-55510},
doi = {10.4230/LIPIcs.TQC.2015.92},
annote = {Keywords: Quantum Money, Quantum Cryptography, Quantum Retrieval Games}
}