Cryptology ePrint Archive: Report 2021/1410

Franchised Quantum Money

Bhaskar Roberts and Mark Zhandry

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.

Category / Keywords: Quantum

Original Publication (in the same form): IACR-ASIACRYPT-2021

Date: received 19 Oct 2021

Contact author: bhaskarr at eecs berkeley edu

Available format(s): PDF | BibTeX Citation

Version: 20211024:072943 (All versions of this report)

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