关键词: 电子商务, 电子现金协议, 标准模型, 零知识证明, 匿名性, 区块链

Abstract:  With the rapid development of the network, the scale of e-commerce is getting bigger and bigger. Electronic cash (e-cash) is an important payment method to e-commerce and attracts a lot of scholars at home and abroad to study it and design a conditional, divisible, transferable or multi-bank e-cash protocol. How to design a safe e-cash protocol with various characteristics is a very important research topic. This paper firstly introduces the basic model of the e-cash protocol. Secondly, this paper introduces the definition, development status and existing problems of the e-cash protocol from various characteristics and gives the application of the e-cash protocol. Thirdly, the important cryptographic primitives are given to construct the e-cash protocol and the provable security theory is described to prove the security of the e-cash protocol. Finally, the problems of the e-cash protocol are summarized and the latest research direction is given.

Key words: e-commerce, e-cash scheme, standard model, zero-knowledge proofs, anonymity, blockchain