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arXiv · 2110.09733

Franchised Quantum Money

Bhaskar Roberts·Mark Zhandry
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Abstract

The construction of public key quantum money based on standard cryptographic assumptions is a longstanding open question. Here we introduce franchised quantum money, an alternative form of quantum money that is easier to construct. Franchised quantum money retains the features of a useful quantum money scheme, namely unforgeability and local verification: anyone can verify banknotes without communicating with the bank. In franchised quantum money, every user gets a unique secret verification key, and the scheme is secure against counterfeiting and sabotage, a new security notion that appears in the franchised model. Finally, we construct franchised quantum money and prove security assuming one-way functions.

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Bhaskar Roberts, Mark Zhandry. 2021-10-19. Franchised Quantum Money. https://arxiv.org/abs/2110.09733

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