Questions and answers about digital currency
Yin Zhentao, deputy director of the law and Finance Research Office of the Financial Research Institute of the Chinese Academy of Social Sciences, said that digital currency faces two risks. The first is the technical level. Digital currency relies on blockchain technology and a system, which will make it suffer from security impact, such as hacker attacks on computer systems. We have seen many practical problems in this process
Zhao Zhanzhan, a special researcher of intellectual property research center of China University of political science and law, believes that digital currency has anonymity, quickness and irrevocability. In addition, bitcoin and other digital currencies have high circulation in the world, so many criminals use digital currency as a new money laundering channel. Moreover, there are many different ways to realize money laundering through digital currency. Generally speaking, the probability of new money laundering being found and investigated is lower than before. Many countries have no effective means and technology to combat money laundering through digital currency. These factors lead to criminals prefer this way of money laundering
digital currency is a kind of unregulated and digital currency, which is usually issued and managed by developers and accepted and used by members of specific virtual communities. The European Banking authority defines virtual currency as a digital representation of value, which is not issued by the central bank or authorities, nor linked with legal currency. However, because it is accepted by the public, it can be used as a means of payment, or it can be transferred, stored or traded in electronic form
according to the notice on preventing the financing risk of token issuance, there is no approved digital currency trading platform in China. According to China's digital currency regulatory framework, investors have the freedom to participate in digital currency transactions at their own risk
warm tips: the above information is for reference only. Before investing, it is recommended that you first understand the risks existing in the project, and understand the investors, investment institutions, chain activity and other information of the project, rather than blindly investing or mistakenly entering the capital market. Investment is risky, so we should be cautious when entering the market
response time: December 11, 2020. Please refer to the official website of Ping An Bank for the latest business changes
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blockchain is a distributed account book technology, and digital currency is currently the main application mode of blockchain technology
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digital currency, based on the characteristics of blockchain, such as decentralization, traceability, non deletion and modification of records, confidentiality, convenient and rapid transaction, can be used as the carrier of asset digitization to a certain extent. Digital currency provides a feasible tool for asset digitization, safe, convenient and transparent transaction
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digital currency is illegal in China. In 2017, many ministries and commissions of the state have issued relevant issues, please search online
Relevant national leaders pointed out that blockchain technology is an important breakthrough for independent innovation of core technology. Therefore, more and more attention will be paid to the application of blockchain technology, and the central bank is also studying DCEP, but it is not clear when digital currency will enter the legal application -
a few countries, such as the United States, Japan and Singapore, are tolerant of digital currency:
1) the United States: there are usdt, ETH, and Libra in the future
2) Japan: in April 2017, Japan implemented the revised capital settlement law, stipulating that digital currency and Japanese yen are legal tender and can be traded with each other
3) Singapore: Singapore is tolerant of digital currency, and it has become a common practice for Singaporeans to invest in digital currency< br />
Digital currency is abbreviated as digiccy, which is the abbreviation of "digital currency" in English. It is an alternative currency in the form of electronic currency. Both digital gold coin and cryptocurrency belong to digiccy
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. It is characterized by the use of P2P peer-to-peer network technology to issue, manage and circulate currency. In theory, it avoids bureaucratic examination and approval, so that everyone has the right to issue currency
Compared with paper money, digital money has obvious advantages, which can not only save the cost of issuance and circulation, but also improve the efficiency of transaction or investment, and enhance the convenience and transparency of economic transaction activities. The issue of digital currency by the central bank also ensures the continuity of financial policy and the integrity of monetary policy, and also ensures the security of monetary transactionsalthough the issuing method of digital currency is still under study, paper currency has been regarded as "the currency of the previous generation" by some professionals, and it is the general trend to be replaced by new technology and new procts. Due to China's large population and volume, the timetable for issuing digital currency is still uncertain. It is predicted that digital currency and cash will be in parallel and graally replaced for quite a long time. When the era of digital currency really comes, people will carry less and less cash, travel more and more safe, poverty alleviation more and more accurate, corruption more and more difficult to escape, and thieves more and more difficult
extended information:
in November 2016, the central bank prepared digital currency, and the cash is likely not to exist in ten years
in November 2016, China digital currency Research Institute was established to cultivate high-level talents of digital currency, carry out digital currency research, consultation, development planning and related activities. It is a non-profit unit with legal license approved by relevant ministries and commissions, and is committed to promoting the integrated development of scientific research and Practice of digital currency instry
so far, Hangzhou, Shenzhen and Guizhou have become the three hot areas for the central bank's digital currency pilot. It is reported that Hangzhou is actively promoting the planning and construction of Qiantang River financial harbor, including the blockchain instry. Hangzhou will build the first blockchain Instrial Park in China, which is located in the Internet Finance town of Xihu District, surrounded by ant financial services, e-commerce bank, Zhejiang University and its science and Technology Park and other well-known enterprises and parks
1. The factor of investment supply and demand is actually not independent, and investors' demand for digital currency is also affected by various news factors. However, from the price surge of last year, in the absence of obvious policy and other news, The admission of investors and investment institutions will also promote the price growth
2. Policy factors are also important factors affecting the price of digital red packets. In the past, the implementation and formulation of policies in South Korea, Japan, the United States and China have affected the price trend of bitcoin
3. The real financial factors and the instability of the real financial world make the demand for digital assets rise from time to time. For example, the Chinese government's policy adjustment, the brexit of the UK, the setback of the global stock market at the beginning of 2018 and other events all give play to the hedging characteristics of digital currency
4. Technical factors. Although the security of digital currency has been highly respected in its development, several technical crises still occurred in its development history. For example, bitfinex, the largest bitcoin dollar exchange, was attacked by hackers and stole 120000 bitcoin, and bitcoin fell by 25% in the following six trading days
5. Good news and bad news will affect the fluctuation of currency value
6. The market trend will be affected by the actions of the leading enterprises in this field, platforms, digital currencies with large market share, leaders with great influence in the market, etc
besides, choosing a good project can avoid risks to a certain extent. For example, HNB, the next generation of decentralized blockchain economy, is a reliable project. It relies on the real economy, and at the same time uses value exchange to continuously create endogenous value. It uses blockchain to build an economy, so that everyone can participate in it and get returns through labor, instead of relying on currency speculation.
bitcoin can exist only because both sides of the transaction recognize its transaction value, so anyone can design virtual currency independently. Ars technica, for example, announced this week that it would create its own cryptocurrency, arscoin[ 2]
Cohen believes that the main threat to digital cryptocurrency is how to keep it safely, and the loss of mt.gox bitcoin once again highlights this problem. Recently, the US Congress has also launched a debate on digital cryptocurrency. Some members believe that the supervision of the bitcoin should be strengthened to avoid risks. Another congressman, Jared polis, believes that the US dollar has similar defects to bitcoin, so if bitcoin is banned, then the US dollar note should also be banned[ 2]
digital currency has a short history of development in the world, but it develops rapidly. Many countries are trying to sum up experiences and lessons through official or non-governmental efforts.
There is no consistent definition of direct banking in China. In general, direct banking is a way that banks break the traditional counter business and can directly handle business on the Internet in order to attract more users and facilitate the use of customers. Users can handle business through web pages, mobile terminals, etc, Save a lot of waiting time for both sides. The business philosophy of this mode is to develop towards faster and more convenient business processing, which greatly reces the time and energy spent by users in banking business processing. Compared with the traditional banks in the past, direct banks mainly have the advantages of strong network dependence, accurate business procts, low cost, convenient and fast, but the relative strong network dependence is also a major factor hindering the development of direct banks. These characteristics make the transaction process of direct bank very simple, operation time is short, the staff is reced a lot, the use of fixed equipment and original procts is reced a lot, and the cost is greatly reced, which is an innovation for the bank to survive in the increasingly fierce competition
There are four trends in the development of direct banking Technology enables the development of direct banking. The application of cloud computing, big data, artificial intelligence, blockchain and other new generation information technology will fundamentally change the operation mode of direct banking, improve service efficiency and level, and rece service cost. The specific ways are mainly reflected in the following aspects. One is to further improve user experience and service efficiency by introcing new technologies such as machine learning, virtual reality and biometrics; Second, through cloud computing, distributed architecture and other solutions, reconstruct the infrastructure deployment mode, rece operating costs, and build the ability to serve a large number of customers; The third is to use big data to improve the level of risk control, anti fraud, proct pricing, precision marketing, intelligent investment consulting, etc. In addition, blockchain and other technologies can provide strong support for the new financial transaction mode In the process of using financial technology, on the one hand, direct banks should grasp the development trend of financial technology, and lay out the field of financial technology by strengthening talent reserve and technology accumulation, and communicating and cooperating with third parties. In the process of continuously enhancing the ability of self-control of core technologies and optimizing and improving the efficiency of the overall science and technology system, we should carry out learning and Research on emerging frontier technologies, apply innovation, cultivate data thinking, establish cooperation mechanisms between internal and external parties, and strengthen mutually beneficial cooperation with frontier high-tech enterprises in big data, cloud computing, artificial intelligence, blockchain, etc, Innovative laboratories such as intelligent risk control and precision marketing can be set up in the form of joint construction, and innovative projects can be researched and implemented to build an intelligent financial technology system with strong cloud computing and big data processing capabilities. On the other hand, it is necessary to build a standardized open business platform, formulate standardized cooperation docking process, build a standardized merchant cooperation platform system integrating docking, joint debugging, testing, online and operation management, quickly and efficiently promote technology docking and financial services standardized output, and use scientific and technological means to improve business capacity2. The development strategy of platform will become the priority of direct banks in the future. In recent years, platform economy is rising rapidly. Among the top 10 companies with global market value in 2017, platform enterprises occupy as many as six seats, namely apple, Google, Facebook, Amazon, Alibaba and Tencent. Platform economy has become a worldwide trend business model and a new economic development paradigm, which has promoted the major changes in proction and lifestyle, and has increasingly become an important part of social economy
for commercial banks, the rapid development of platform economy has brought both opportunities and challenges. Platform enterprises gather a large number of merchants and customers. Merchants and customers have financial service needs. The platform has financial cross-border cooperation, data commercialization, business compliance and other needs, which puts forward new requirements for the traditional customer acquisition and service mode of commercial banks. The platform has rich resources such as business flow, logistics and capital flow, and is an important customer group of commercial banks
direct banking service platform will become the future trend. Through the construction of financial service intermediary platform, the direct bank realizes the integration of basic procts and services of the bank, interbank, non interbank and other institutions in the proct end, and creates the financial cloud of wealth management, network financing, payment and settlement, big data services. In terms of customer service, it will realize the integration of platform enterprises, small and medium-sized enterprises on the platform, small and medium-sized enterprises on the platform Comprehensive and comprehensive services for consumers on the platform
in the face of different platforms in the fields of consumption, instry and government affairs, the strategies of financial intermediary service platform constructed by banks are also different, which can be built according to three modes
(1) for those related fields that have not yet formed a platform for aggregation and specialization, direct banks can integrate internal and external resources, open up key nodes through self construction, M & A, investment and other forms, and build an in-house financial intermediary service platform to cover the whole scene of subdivided instries. Taking the acquisition of auto home by Ping An Trust in 2016 as an example, auto home, as a domestic auto vertical professional media, will not only obtain strong support from Ping An Group in terms of capital, but also become an important part of building an all-round auto service ecosystem for Ping An group. To build a platform model, it is generally necessary to rely on the resources of the group or parent bank to form a synergy of public and retail business; In addition, banks need to define their own service boundary, avoid large and comprehensive platform, resulting in excessive resource investment, and it is difficult to meet the personalized needs
(2) if a specialized platform has been formed in relevant fields, or the platform has not extended to the financial field e to regulatory requirements, direct banks can export financial procts and services through docking with such platforms
(3) the relevant fields have formed monopolistic resource integrators, and the services have been extended to the financial field, so it is difficult for banks to build their own platform to let the participants settle in. The relatively feasible solution for direct banks is to provide funds and financial services to the platform
3. Service scenario. In the future, direct banking procts will be a standardized proct that can be easily embedded into various financial scenarios. According to the view of a bank's senior financial practitioners, it is financial media. In the future, Internet banking and direct banking will become media tools for a bank to carry out mobile financial transformation. In the Internet dimension space, Internet banking and direct banking will become media tools, As a medium like air, it permeates into various scenes of financial services
4. Independent organizational structure. Most foreign direct banks adopt the independent legal person business model, and China's direct banks will graally develop in the direction of independence. With the official opening of Baixin bank, the first independent legal person direct bank in China, several independent legal person direct banks may be approved. The independent organizational structure of direct bank will have a positive impact on proct innovation, risk isolation from parent bank, mobilization of team enthusiasm, cost accounting, customer management, science and technology development mechanism, etc
In the process of independent corporatization of direct banking, the introction of external strategic investors will become one of the options. Through the introction of strategic investors, the capital strength can be improved. At the same time, through the docking with shareholders' resources, technology, scene, etc., the construction and development ability of direct banking ecology can be rapidly improved, and the coordination and win-win between direct banking and shareholders can be realizedhash value of previous block: prev_ Hash
the hash tree value of the transaction to be written: Merkle_ Root
update time: ntime
current difficulty: nbits
the process of mining is to find x to make
sha256 (version + prev)_ hash + merkle_ root + ntime + nbits + x )) < Target
the range of X in the above formula is 0 ~ 2 ^ 32, which can be calculated according to the current difficulty. In addition to x, you can also try to change Merkle_ Root and ntime. Because of the hash feature, finding such an X can only be brute force search
once you find x, you can broadcast a new block, and other clients will verify whether your block is legal. If your block is accepted, the first transaction in each block must be to send the newly generated 25 bitcoins to an address. Of course, you will set the address to your own address to get the 25 bitcoins< Every transaction record of bitcoin from the beginning to now has been saved on the network. The whole bitcoin network maintains a huge transaction record file (about 12g now). The average update cycle of this file is 10 minutes. The newly added transaction record is called a block, and this huge file is composed of a series of blocks, called block chain.
Why are 25 bitcoins
this is the rule. At first, there are 50 bitcoins. For each half of the remaining bitcoins, the income will be halved. In this way, the total amount of bitcoins that can be generated will approach 21 million. If you still claim to have g up 50 bitcoins, it will not be accepted by other clients, and the block will be g up in vain
how to ensure that the average update cycle is 10 minutes
the smaller the target, the more difficult it is to solve X. for every 2016 blocks (about 14 days) generated, the network will adjust the target according to the average interval of new blocks generated ring this period
is it the fastest person who always solves it first
No. You always want to take the mining income as your own, so when everyone calculates, the address to send the mining income is different, so Merkle_ Root is different, that is to say, everyone starts to solve from a different initial state
how to solve it at the same time
there will be a fork in the block chain. Some clients accept a and some accept B. until a branch becomes longer, everyone will choose the longer branch. If what you dig is unfortunately not selected, your mining income will be invalid
since I choose a longer branch, how can I solve it with very low difficulty
the client finds the most difficult and longest branch among many branches
are these calculations wasted
if you want to spend a sum of money twice, you need to do so. Dig a new block, but hide not broadcast, and continue to mine. Find merchant a, pay bitcoin, and let others on the network dig the block and write the transaction record. Find merchant B, pay bitcoin, and write the block you g. If you can get two blocks first and broadcast them, everyone will take your longer branch as the current block chain, and the bitcoin received by merchant a will not be recognized. In this way, the probability of successful attack depends on the speed of hash calculation. If the computing power of the whole network is high enough, the success rate of such attacks is very low or the cost is very high.