Franchised Quantum Money
Cryptography and Security
2021-10-20 v1 Quantum Physics
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.
Keywords
Cite
@article{arxiv.2110.09733,
title = {Franchised Quantum Money},
author = {Bhaskar Roberts and Mark Zhandry},
journal= {arXiv preprint arXiv:2110.09733},
year = {2021}
}