Lingsheng virtual currency
virtual currency and electronic currency are not the same concept
the definition of e-money is to convert a certain amount of cash or deposit from the issuer and obtain data representing the same amount. By using some electronic methods, the data can be directly transferred to the payment object, so as to pay off the debt. E-money means that consumers pay traditional money to issuers of e-money, and issuers store legal money of equal value with traditional money in electronic devices held by consumers
electronic currency is the electronization of the legal tender, including our common bank cards, Internet banking, electronic cash, etc., as well as the third party payment developed in recent years, such as Alipay, fortune paid and so on. No matter what form these electronic currencies are and through which institutions they circulate, their original source is the legal money issued by the central bank
but virtual currency is the electronization of illegal currency, and its original issuer is not the central bank. For example, Tencent Q currency and other game currency, such virtual currency is mainly limited to circulation in a specific virtual environment. After the emergence of bitcoin, through the blockchain technology to better solve the problem of decentralization, distrust, to achieve global circulation, is sought after in the world. Electronic currency and virtual currency are collectively referred to as digital currency
virtual currency is different from check and telegraphic transfer. The value that virtual currency can't realize can't be transferred by bank. At present, it can only circulate in the network world. Virtual currency is released by various network organizations, and there is no unified issuance and management standard
since 2013, digital cryptocurrency has become popular, including bitcoin, Ruitai coin, Laite coin, Ruibo coin, thousand gold card, etc.
in a distributed system, multiple hosts may fail to communicate with each other through an asynchronous system, and the performance of the host may decline, and the network may be congested, which may lead to the spread of error information in the system. Therefore, it is necessary to define fault-tolerant protocol in the default unreliable asynchronous network to ensure that all hosts reach a safe and reliable state consensus
the first problem to be solved is how to achieve the consistency and correctness of the ledger data on different ledger nodes when using the blockchain to construct the Internet-based decentralized ledger
we need to learn from the existing algorithms to achieve state consensus in the distributed system, determine the mechanism to select accounting nodes in the network, and how to ensure that the accounting data form a correct and consistent consensus in the whole network.