Signing Perfect Currency Bonds
Subhayan Roy Moulick, Prasanta K. Panigrahi

TL;DR
This paper introduces a Quantum Cheque Scheme that enables secure, unforgeable digital payments using quantum cryptography, providing an unconditionally secure alternative to electronic payment systems.
Contribution
It formally defines a Quantum Cheque and presents the first unconditionally secure quantum cheque scheme resistant to no-signaling adversaries.
Findings
First unconditionally secure quantum cheque scheme
Secure against no-signaling adversaries
Quantum analogue of electronic data interchange
Abstract
We propose the idea of a Quantum Cheque Scheme, a cryptographic protocol in which any legitimate client of a trusted bank can issue a cheque, that cannot be counterfeited or altered in anyway, and can be verified by a bank or any of its branches. We formally define a Quantum Cheque and present the first Unconditionally Secure Quantum Cheque Scheme and show it to be secure against any no-signaling adversary. The proposed Quantum Cheque Scheme can been perceived as the quantum analog of Electronic Data Interchange, as an alternate for current e-Payment Gateways.
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Taxonomy
TopicsQuantum Computing Algorithms and Architecture
