Digital currency related work
It's illegal
First, digital currency ICO is illegal in China.
in September 2017, the people's Bank of China issued an announcement on preventing the financing risk of token issuance, which formally determined that ICO is illegal financing without approval, and no organization or indivial is allowed to participate
later, it was announced on April 23, 2018 that the left and right digital currency ICO platforms had all withdrawn from the Chinese market, so the current ICO is illegal in China
Second, digital currency exchange is prohibited in China.
after announcing that ICO is an illegal financing activity, the central bank also listed services such as trading, exchange, pricing and information intermediary for virtual currency as prohibited items, which means that digital currency exchange is illegal in China
all trading platforms, including bitcoin China, okcion and fire coin, announced in 2018 that they would stop the RMB recharge business and graally shut down their trading platforms. As of April 2018, all digital currency exchanges had completely withdrawn from the Chinese market
digital currency generally has a special digital currency exchange. We can buy the digital currency we need in our digital currency exchange
we can buy from our friends in addition to the exchange. If a friend has something, you can discuss and ask if he can sell it to you
we can buy our digital currency from traders nearby if we need more
we accept payment by digital currency payment service. If we open a physical store, we can support payment by digital currency, so we can also get our digital currency
finally, we can get digital currency by mining, and we can get digital currency by equipping mining machine to work mining, such as investing more hardware
digital currency trading: it can be traded only after RMB or digital currency is recharged in a third-party digital currency exchange
purchase of digital currency: no matter how many coins you buy, there is no limit. For example, if bitcoin is 100000 yuan, you can buy 0.0001, and there is no limit on how many coins you can buy or sell
digital currency trading time: 365 days a year, 24 hours a day, can be traded
In the morning of March 9, 2014 Beijing time, Jared Cohen, creative director of Google, said at the Sxsw conference this week that digital cryptocurrency similar to bitcoin will exist for a long time. Cohen and Eric Schmidt, Google's chairman, promoted their co-author book the new digital age at the conference
in the past few months, bitcoin prices have fluctuated significantly. At the same time, this digital currency is strongly supported by the hacker community and is closely related to some black markets. Cohen believes that bitcoin has its value, but it will bring risks if it is not regulated
mt.gox lost $400 million worth of bitcoin, which shakes the confidence of the outside world in bitcoin. Some critics even point out that "bitcoin is dead". However, Cohen's statement is a strong support for cryptocurrency technologies such as bitcoin
bitcoin can exist only because both sides of the transaction recognize its transaction value, so anyone can independently design a virtual currency. Ars technica, for example, announced this week that it would create its own cryptocurrency, arscoin
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
digital currency has a short history in the world, but it develops rapidly. Many countries are trying to sum up experiences and lessons through official or non-governmental efforts
take Europe as an example. In 2015, the transaction volume of digital currency in relevant European countries and regions exceeded 1 billion euro. Although the total amount is not large, it is fierce
it was reported on January 2, 2016 that the Bank of England is also considering whether to issue digital currency by the central bank, and the research work is still in the initial stage. Andy Haldane, chief economist of the Bank of England, said that switching to digital currency would be "a great technological leap forward"
DNB, Norway's largest bank, has already cancelled the cash counter service. The bank called on the government to stop using paper money completely. According to the data, only 6% of Norwegians still use cash every day, most of them the elderly. The social cost of cash payment is twice that of electronic money payment. In one day's life, the payment of bus, shopping, payment, refueling, and even parking is completed by swiping the card. Only when the children's school holds a charity sale can the banknotes be used
compared with paper money, digital currency 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 transactions
although 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 technologies and 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
specifically, according to Yao Qian, director of China digital currency Research Institute, the design framework of central bank's digital currency is mainly convenient and efficient, safe and controllable, and popular development
as for the two-tier framework, the two-tier framework is the central bank and the commercial bank, based on the account and wallet. This framework is to combine the original bank account system with the account system based on digital currency wallet
in blockchain technology, digital currency is separated from legal currency system and bank account system. Otherwise, together, it will cause chaos. Considering this problem, Yao Qian introced digital currency wallet into the account system of commercial banks. In this way, an account can manage both electronic currency and digital currency. Of course, this kind of design has a great impact on the current banking system, but it is also a resource for commercial banks with mature system
how does digital currency wallet work in commercial banks
bank accounts and digital currency wallets of commercial banks have common management features. In this case, bank accounts and digital wallets have different positioning. According to the wallet standard designed by the central bank, a wallet is equal to a safe deposit box. According to the requirements of customers, the bank will manage the safe deposit box as all the properties of cryptocurrency. This framework adds a Digital Wallet ID field to the bank account. In this way, the wallet has the function of a safe deposit box and does not participate in the business, so as to avoid affecting the core business of the bank
digital currency transfer can be directly transferred in the commercial banking system, or through the note issuing bank using the client-side digital wallet, direct point-to-point transactions, so that there is no need to rely on inter-bank payment between account banks< In a word, digital currency wallet is the personal wallet in the commercial banking system
theoretically, the payment system deals with demand deposits, while digital currency is in the category of cash
is the digital currency issued by the central bank decentralized
Yao Qian said that the biggest issue facing the instry now is whether decentralized distributed ledger should be used at the top level
Central Bank digital currency is more convenient and can develop into controllable anonymity through centralized issuance and account based weak association. However, in the digital world, we cannot confuse the economy and finance behind the numbers. Although they are all numbers, they represent different assets, so the central bank will keep them in mind when designing. We want to have a mature financial infrastructure for legal digital currency, but considering that the note issuing bank is only responsible for the digital currency itself, and the account bank is responsible for the actual management business, so as long as the specific application is implemented, the note issuing bank and the account bank will perform their ties and do their best
then the characteristics of the central bank's digital currency are
1. Digital currency, like RMB, has stable value
2. The operation mode is the same as RMB, which is endorsed by the national credit and issued by the central bank, and all commercial banks exchange it into the market
3. Digital currency issuance relies on big data, because it has the possibility of real-time collection of currency bookkeeping, flow, transaction, etc., which can provide help in anti money laundering
4. After digital currency replaces paper currency, it will play a positive role in preventing counterfeit banknotes, changing change, and preventing damage and loss ring transaction storage
5. It will rece the waste of resources. The proction and printing of paper money need cost, while the proction of digital currency depends on big data, so it will rece the waste of resources
therefore, with the advent of the central bank's digital currency, personal participation will have less opportunities to make money
I hope it can help you
hope to adopt it
From 2015 to 2017, the price of bitcoin increased from more than $100 to $17000, a 100 fold increase. Today, the market value of various numerical currencies is more than 700 billion US dollars. The myth of their benefits is not nonsense
but there are many things behind the chaotic digital currency. You may ask why air currency can be listed on the stock exchange? It's very simple. The exchange also has to charge a part of the fee. Raise the price and then sell it to make money. So the question is, how to identify air currency
first of all, you need to look at the projects behind the digital currency and see what their team background is. Generally speaking, teams without experience in the instry tend to earn money, but how much experience do they have? It is better to be able to participate in the construction of Ethereum and bitstock communities. Such a team is often more reliable. This requires investors to have a certain screening ability to identify good or bad
secondly, there is no way to implement many projects. How can we identify them? In addition to the ability of the team, we also need to see the feasibility, which requires us to systematically learn the knowledge of bitcoin and blockchain. For example, Zhu Jiawei, the COO of fire coin network, learned the blockchain from 0 to 1, and clearly described the development process of bitcoin and blockchain in the form of audio and text. Besides, don Tapscott and Alex Tapscott's "blockchain revolution" are worthy of careful taste
moreover, the bubble of digital money is very large nowadays. In the bubble, it is not difficult to make money, but the key is not to be greedy. Long term holding is not good, but it can be operated in a short term. You can make money if you want. However, the key is that people are all profit-making and greed is their nature. Therefore, many people do not accept what they see. They originally made money, but later they lost everything. The gain is not worth the loss. Therefore, it is necessary to control greed
coinbase transaction is a special transaction that generates bitcoin "out of thin air". Only miners can write this kind of transaction, and the number of generated bitcoin is limited by rules (new currency reced by half for every 210000 blocks + transaction fee for this block)
however, the rules do not stipulate that the miner must take away all the rewards that can be taken, and can choose not to take them
therefore, a mine pool connected with the RSK side chain has made a bug before, forgetting to take away the reward and occupying a pit in a block for nothing, which is equivalent to destroying the corresponding amount of bitcoin, making the total amount of bitcoin decrease a little bit permanently
in addition, to spend a bitcoin, you only need to specify the transaction ID and output serial number
as like as two peas in multiple blocks repeatedly write identical coinbase transactions, the transaction ID is also repeated.
therefore, this kind of situation also occupies the pit of a block in vain, and permanently destroys the corresponding amount of bitcoin
it seems to me that this is still a security vulnerability, so the new version of bitcoin software later banned the writing of repeated coinbase transactions. But until now, there has been no ban on miners not getting their e rewards
generally speaking, a coin is controlled by a private key. If a coin is transferred to an address where no one knows the private key, it will be destroyed
if the owner does a good job in security, and the private key is not disclosed and cannot be guessed, but he accidentally loses the private key, it is equivalent to destroying all the coins he owns
there are only some special circumstances that require intentional destruction of coins
one is irreversibly converted into another kind of currency, such as the contract currency XCP attached to bitcoin and wormhole cash WHC attached to BCH
the second is to save certificates and data on the chain, such as the time stamp: panbiao.com/2013/08 /
and the crowd funding of the original Ethereum founding team: zhuanlan.hu.com/p/29
the private key is essentially a big number. Whoever knows this number can control the currency on the corresponding address. So the private key must be generated with reliable random number, otherwise it may be guessed and stolen
compared with the token, the address is the hash of the public key. There is no way to judge whether an address has a corresponding public key and private key (even if the public key is known, the corresponding private key cannot be known). Therefore, even if it is explicitly the address of "burned" token, the system does not prohibit the transfer in
strictly speaking, what locks the currency is a small program (script). This program takes the input as the public key and digital signature. First, check whether the public key hash is consistent, and then check whether the digital signature is valid. If it is valid, it will be verified and transfer is allowed; Otherwise, it will be judged that the transaction is illegal and refuse to package into the chain
it is the whole node software that explains and executes this program. It can be said that the software code of the whole node specifically defines a coin
however, the current situation is very embarrassing. Most miners do not run the whole node, only a few mines are running. The vast majority of users do not run the whole node, even if they run the whole node, they can only perform verification, no computing power, no block.
proct manager is a professional position responsible for proct management in an enterprise. The proct manager is responsible for investigating and determining which proct to develop, which technology and business model to choose according to the needs of users. And promote the corresponding proct development organization, he also according to the proct life cycle, coordinate R & D, marketing, operation, determine and organize the implementation of the corresponding proct strategy, as well as a series of other related proct management activities
for example, the proct manager of European crowdfunding is to manage crowdfunding procts, such as operation, maintenance, marketing, etc.
With the continuous development of Internet and computer technology, whether it is the third-party payment or automatic settlement function, it has brought great convenience to people's life. Recently, another good news is that the era of digital currency is coming. Major banks have successively joined the digital currency pilot work of the central bank. The good news of digital currency appears frequently. The digital currency wallet launched by CCB app is currently being tested, which is one step closer to the official use of digital RMB