Unconditionally Secure Quantum Payment System
نویسنده
چکیده
A potentially serious problem with current payment systems is that their underlying hard problems from number theory may be solved by either a quantum computer or unanticipated future advances in algorithms and hardware. A new quantum payment system is proposed in this paper. The suggested system makes use of fundamental principles of quantum mechanics to ensure the unconditional security without prior arrangements between customers and vendors. More specifically, the new system uses Greenberger-Home-Zeilinger (GHZ) states and Quantum Key Distribution to authenticate the vendors and guarantee the transaction integrity. Keywords—Bell state, GHZ state, Quantum key distribution, Quantum payment system.
منابع مشابه
Signing Perfect Currency Bonds
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-signali...
متن کاملUnconditionally Secure Quantum Bit Commitment is Simply Possible
Mayers, Lo and Chau proved unconditionally secure quantum bit commitment is impossible. It is shown that their proof is valid only for a particular model of quantum bit commitment encoding, in general it does not hold good. A different model of unconditionally secure quantum bit commitment both entanglement and disentanglement-based is presented. Even cheating can be legally proved with some le...
متن کاملUnconditionally Secure Quantum Signatures
Signature schemes, proposed in 1976 by Diffie and Hellman, have become ubiquitous across modern communications. They allow for the exchange of messages from one sender to multiple recipients, with the guarantees that messages cannot be forged or tampered with and that messages also can be forwarded from one recipient to another without compromising their validity. Signatures are different from,...
متن کاملAre entanglement and quantum computer necessary for quantum bit commitment ?
. It was claimed that unconditionally secure quantum bit commitment is impossible due to quantum-computer-assisted-entanglement-attack Recently we have shown that quantum computer-assisted-entanglement-attack can be totally foiled by entanglement and quantum computer. Here we present an alternative un-entanglement based quantum bit commitment scheme. Although the scheme is unconditionally secur...
متن کاملUnconditionally Secure Quantum Bit Commitment
Lo and Chau, and independently Mayers, have shown that all quantum bit commitment schemes proposed to date are insecure: one or both participants can cheat if they have a quantum computer. They claim also to have demonstrated that unconditionally secure quantum bit commitment is impossible. However, their no-go arguments rely on models of quantum cryptographic protocols which are insufficiently...
متن کامل