A Practical E-Payment Protocol Based on Quantum Multi-Proxy Blind Signature**Supported by the National Natural Science Foundation of China under Grant Nos. 61402275, 61402015, 61273311, the Natural Sci- ence Foundation of Shaanxi Province under Grant Nos. 2015JM6263, 2016JM6069 and the Fundamental Research Funds for the Central Universities under Grant No. GK201402004

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.