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Modern Physics Letters A

An improved E-payment protocol based on quantum blind signature without entanglement

Xiang-lin Gou, Runhua Shi, Ze Shi, Kunchang Li

Published Jan 20, 2021• 6 citations
Publisher

Abstract

E-payment plays an important role in modern daily life, so the security problem of E-payment has been widely concerned by researchers. In a recent paper [Int. J. Theor. Phys. 57, 2657 (2018)], the authors presented a trusted third-party E-payment protocol based on quantum blind signature without entanglement. In this paper, we show that there is a serious security flaw in their E-payment protocol. That is, the partial keys will be disclosed by performing a simple attack strategy. Furthermore, we propose an improved E-payment protocol and analyze its security.

DOI
10.1142/s0217732321500401

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E-payment plays an important role in modern daily life, so the security problem of E-payment has been widely concerned by researchers. In a recent paper [Int. J. Theor. Phys. 57, 2657 (2018)], the authors presented a trusted third-party E-payment protocol based on quantum blind signature without entanglement. In this paper, we show that there is a serious security flaw in their E-payment protocol. That is, the partial keys will be disclosed by performing a simple attack strategy. Furthermore, we propose an improved E-payment protocol and analyze its security.
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Recently, the laws of quantum physics have amazed classical cryptography and aided researchers to provide secure communications in presence of adversaries. In this paper we present a novel weak blind signature scheme whose security is guaranteed by fundamental principles of quantum physics. Despite previous schemes which are taking advantage of quantum entangled states, our proposed quantum blind signature relies only on Quantum Key Distribution (QKD) protocol. We show throughout this paper that our proposed quantum weak blind signature achieves a good position in security and reliability. In addition, it is feasible for the proposed scheme to become commercialized with current technology. Hence, it can be widely used for e-payment, e-government, e-business and etc.
With the in-depth development of the digital economy and the escalating demands for transaction security and quantum attack resistance in electronic payment scenarios, quantum signature is gradually emerging as a core research direction in the construction of electronic payment security systems. Addressing the requirements for anonymity and security in electronic payment scenarios, this paper proposes an electronic payment scheme based on controlled quantum teleportation. During the implementation of the scheme, the quantum entanglement characteristics of the four-particle entangled state, the core logic of controlled quantum teleportation, the privacy protection features of proxy blind signature technology, and the technical advantages of superdense coding are integrated to provide security guarantees for the payment process. Meanwhile, the proposed scheme builds a payment system relying on quantum key distribution protocols, forming a payment system with information-theoretic security attributes. This effectively overcomes the limitation that traditional UnionPay payment systems rely on computational complexity at the security level. In addition, the scheme satisfies nonrepudiation and unforgeability and possesses the capability to resist interception-resending attacks.
Electronic payment protocols play a vital role in electronic commerce to ensure the security of transaction process. Current electronic payment protocols based on complex mathematical problems will be vulnerable facing a quantum computer. In order to enhance the security against quantum computers, quantum cryptography is introduced into electronic payment protocols. Although the quantum cryptography is claimed to be unconditionally secure, Logical defects are still likely to cause serious problems. We introduced formal analysis to verify the security of electronic payment protocols based on quantum cryptography. Formal analysis methods can discover the vulnerabilities of protocols and help to improve the security of protocols. In this paper, we analyze an electronic payment protocol based on quantum cryptography and the result shows that the protocol is not secure even adopting unconditionally secure quantum cryptography. We found that both the accountability and fairness of the original protocol are not satisfied. Then we proposed an improved protocol to meet the requirement of accountability and fairness and verified it through formal analysis method.
Abstract A practical E-payment protocol is presented in this paper. It is based on quantum multi-proxy blind signature. Adopting the techniques of quantum key distribution, one-time pad and quantum multi-proxy blind signature, our E-payment system could protect user’s anonymity as the traditional E-payment systems do, and also have unconditional security, which the classical E-payment systems can not provide. Furthermore, compared with the existing quantum E-payment systems, this practical system could not only support mobile E-payment transactions but also inter-bank transactions .