This paper discusses the relationship between digital currency a
1. Application of different
digital currency: fast, economic and safe payment and settlement; Bill finance and supply chain finance; The real right of collateral is digitalized
e-money: the seller sends the buyer's payment instructions to the seller's acquiring bank through the payment gateway; The acquiring bank obtains the authorization from the issuing bank through the bank card network, and sends the authorization information back to the seller through the payment gateway; After obtaining the authorization, the Seller shall send the buyer the shopping completion information. If payment acquisition and payment authorization cannot be completed at the same time, the seller should send payment acquisition request to the acquiring bank through the payment gateway, and transfer the transaction funds from the buyer to the seller's account. The final inter-bank settlement is completed by the payment system between banks
2. Different characteristics
digital currency is characterized by low transaction cost, fast transaction speed and high anonymity
e-currency is characterized by anonymity, saving transaction cost, saving transmission cost, small holding risk, flexible and convenient payment, anti-counterfeiting and anti repetition, and non traceability
Digital currency can be divided into three categories: completely closed, unrelated to the real economy and only used in specific virtual communities, such as world of warcraft gold; It can be purchased in real currency but not converted back to real currency, and can be used to purchase virtual goods and services, such as Facebook credit; It can exchange and redeem with real currency according to a certain ratio. It can purchase both virtual goods and services and real goods and services, such as bitcoine-money: e-cash based on the Internet environment and keeping the binary data representing the value of money in the hard disk of the computer terminal; An electronic wallet that keeps the value of money in an IC card and can be circulated out of the bank payment system
1. Digital currency
digital currency is an alternative currency in the form of electronic currency. Both digital gold coin and password currency belong to digital currency
digital currency is different from the virtual currency in the virtual world, because it can be used for real goods and services transactions, not limited to online games. The early digital currency (digital gold currency) is a form of electronic currency named after the weight of gold. Today's digital currency, such as bitcoin, lightcoin and ppcoin, is an electronic currency created, issued and circulated by check sum cryptography
features: the use of P2P peer-to-peer network technology to issue, manage and circulate currency theoretically avoids bureaucratic examination and approval, so that everyone has the right to issue currency
Electronic money means that a certain amount of cash or deposit is exchanged from the issuer and the data representing the same amount is obtained. By using some electronic methods, the data is directly transferred to the payment object, so that the debt can be paid off. Strictly speaking, consumers pay traditional money to the issuers of electronic money, and the issuers store the equal value of traditional money in the electronic devices held by consumers in electronic form. In short, when we deposit money into our bank account, there will be an extra number in the bank account, which means how much money we have saved. In this process, we give the banknotes in our hands to the bank, and the bank adds a number to our bank card, which is our electronic currencyfeatures:
< UL >e-money and paper money (or physical money) can be easily converted to each other
the data of electronic currency corresponds to the same amount of physical currency
we need to pay physical money to the issuers of e-money (banks and other financial institutions) in order to exchange for the same amount of e-money
3. The similarity between digital currency and electronic currency: both exist in the form of electronic data
The differences between digital currency and electronic currency are as follows:electronic currency has an issuing institution, and the corresponding amount of physical currency in the institution can be exchanged with physical currency; However, digital currency has no specific issuing institution (decentralization) and can only exist in network data
at present, there is no international consensus on whether digital currency is a currency or not, so in China, the main form of digital currency is "investment proct", which is a rather risky investment proct, and only a few businesses are willing to accept digital currency consumption; Of course, some countries (Germany, etc.) have officially recognized the currency status of digital currency
digital currency, bitcoin? There is no real value.
Do you mean there is no essential difference between digital currency and the existing monetary system? I don't know where to draw this conclusion. At present, the general digital currency mainly includes bitcoin, Ethereum, reborn, Leyte and other virtual currencies. These virtual currencies are very different from the existing monetary system! For example:
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issuers: the issuers of existing legal tender are national government agencies, generally the central bank. Bitcoin and other digital currencies are issued according to the program encryption algorithm. If we want to say that the issuing subject, even one person can issue them. There is no credibility or coercion
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credibility. The existing monetary system, that is, legal tender, has the endorsement of national credit, which has more credibility. Bitcoin and other digital currencies rely on algorithms, which are often issued by a community or even indivials, with weak credibility
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mandatory. The existing monetary system, namely legal tender, is issued by the state and circulates in a country or region according to law. Digital currencies, such as bitcoin, do not have the power to enforce the law
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volatility. In the current monetary system, there are exchange rate fluctuations in various legal currencies, but they are basically in a relatively stable state. As for bitcoin and other digital currencies, you can look at the market of digital currencies on investing. It can be seen that the price difference of bitcoin even one day is more than 10%, which is obviously unstable
it's like an account book. We can record all our loans on it. Anyone can write on it, but how can we ensure that others don't Scribble
you will want to sign at the back, but someone will fake your signature. So we need to use electronic signature, that is, each account will generate a key, which only you know, and then confirm that the signature is your own through the public key
the above is only a safe way of lending, but it still needs a website to act as a bank, so the website can modify the amount of lending at will, and there is no law to restrict it
therefore, it is necessary to decentralize, that is, to publish one's own account and let everyone share it, so that the opposite side will not cheat. But how do you make sure people don't tamper with your bills
first of all, an account book must be divided into one page, that is, blockchain. According to the content of the blockchain, a hash function (a bit like a key, but with different functions) will be generated. The hash function is a one-way function and can't be pushed backward, so you can only rely on guessing to decipher it. The amount of enumeration needed to decipher a password is called workload. Then the computer will stamp the proof of workload on your bill, and the proof of workload means there is no mistake. So how can you convince others that you're not lying
this requires credibility. The measure of credibility is workload. The bill with heavy workload has more credibility. The workload here does not refer to the amount of calculation, but refers to the number of bills, that is, the number of blockchains. The more repeated the same account is received, the stronger the credibility is. Because others will sort out the accounts they receive, and then re publish them, which is an infinite cycle process. This prevents people from cheating by not publishing their bills
every time a blockchain is released, it will be rewarded, that is, "mining". But in order to prevent the unlimited expansion of bitcoin, bitcoin will dig less and less, that is, the rewards will be less and less. Therefore, players want to increase the release volume of blockchain by paying others a reward (service charge) at their own expense, and at the same time form its monetary function
furthermore, the total number of bitcoin is unchanged, but more and more people use it, so it is more and more difficult to dig, which is why many people have been complaining about the mine disaster
in my opinion, bitcoin is not so much a currency as a game. In short, it means that you pay more for mining, and the more you dig, the more you win.
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