Development of blockchain application development
blockchain classification:
1 private chain
refers to the blockchain with certain centralized control. Only the general ledger technology of blockchain is used for bookkeeping. It can be a company or an indivial who enjoys the exclusive write permission of the blockchain. This blockchain is not very different from other distributed storage schemes. The participating nodes are only users themselves, and the access and use of data have strict authority management. Due to the existence of centralized control, alliance chain can also be considered as a private chain
features: because the user has the final say, the data inside can not be changed, and there is not much protection for the third party. Generally used for internal audit. The vice president of fire coin technology believes: there are indeed a large number of scenarios in the private chain that can meet the needs of the real world. Limited decentralization makes it easier to reach a consensus, which can make the transaction faster and more efficient, and can provide more controlled functions. Decentralization is the core value of blockchain technology. If the private chain can not make full use of the decentralized trust base constructed by the public chain in practice, its development space will be limited
2public chain
public blockchain is the earliest blockchain and the most widely used one at present. It refers to a completely decentralized blockchain like bitcoin blockchain, which is not controlled by any organization. Any indivial or group in the world can send a transaction, and the transaction can be effectively confirmed by the blockchain, and anyone can participate in the consensus process. Participants in the consensus process maintain database security through cryptography and built-in economic incentives
features: completely open, uncontrolled, rely on encryption technology to ensure security
3 alliance chain
multiple preselected nodes are designated as bookkeepers within a certain group. The generation of each block is jointly determined by all preselected nodes. Other access nodes can participate in the transaction, but not the bookkeeping process (in essence, it's still managed bookkeeping, but it's just distributed bookkeeping. How many preselected nodes are there, How to decide the bookkeeper of each block becomes the main risk point of the blockchain). Anyone else can make limited query through the open API of the blockchain
the nodes participating in the blockchain are selected in advance, and the nodes are likely to have good network connections. Other consensus algorithms without workload proof can be used on such a blockchain. For example, a blockchain has been established among 100 financial institutions, and more than 67 institutions must agree to reach a consensus
Prospect:
the development of blockchain technology has also brought changes in the operation concepts of various instries. New technologies and new concepts have promoted the new development of various instries. This driving force has a huge impact on society and the promotion of economic activities. Many new instrial phenomena will occur one after another, and the public will wait and see, It is expected that this new technology will be used by all instries and benefit all instries better
in the Internet era, there is a database behind every system. This database can be regarded as a large account book. In the past, the person who maintained the system was responsible for managing the database and recording the user's behavior, that is, bookkeeping. However, the blockchain is "decentralized", which allows every member of the system to participate in it, not only everyone bookkeeping, but also through links, Everyone can have a complete account book
"blockchain is essentially a collective recording mode. What's special is that it adopts a set of techniques in an ingenious way to realize the authenticity and credibility of the recorded results, which is difficult to destroy and tamper with. " Zhang Xiaorong said, "first, everyone has the right to record and authenticate with each other to distinguish the true from the false, which is called consensus mechanism; Second, no one can tamper with the records, because there are cryptographic signatures; Third, everyone has a , so even if some account books are damaged, the whole will not be affected. This is called distributed storage. The information recorded in this way is presented in block mode according to the time chain, so it is called blockchain. "
various cryptocurrencies represented by bitcoin are originally an application of blockchain technology, which can be described as blockchain version 1.0. However, around 2014, the instry began to realize the important value of blockchain technology. Blockchain graally separated from digital currency and applied to various economic and social fields other than digital currency
it has broad application prospects
blockchain technology is considered as a disruptive innovation after steam engine, electric power and Internet. If the steam engine and electricity liberate the proctivity, and the Internet has changed the way of information transmission, the blockchain, as a machine for building trust, may change the way of value transmission
for example, in the financial field, the cost of reconciliation, clearing and settlement between financial institutions, especially cross-border financial institutions, has always been very high, and there are complex manual processes. The application of blockchain technology can help rece the cost of reconciliation and dispute resolution between financial institutions, and significantly improve the processing speed and efficiency of payment business, It also makes small cross-border payments possible. In December 2017, China Merchants Bank completed the RMB position transfer business from Hongkong Wing Lung Bank to Shenzhen Branch of Wing Lung Bank. This is the world's first interbank cross-border RMB clearing business based on blockchain technology
in addition, according to the white paper 2016 on China's blockchain technology and application development issued by the Ministry of instry and information technology of China, the application of blockchain has been extended to medical and health, ecation, charity, social management and other fields. Taking the cultural instry as an example, the low cost of reproction, the high cost of safeguarding rights, and the difficulty of providing evidence make the protection of intellectual property rights a pain point for the instry. With blockchain, the proction, dissemination and transaction records of cultural procts are true, transparent and reliable, and the problem can be solved
Zhang Xiaorong said that blockchain technology has solved two major problems in the era of Digital Economy: one is the visible flow direction, and the other is zero trust cost. In the past, the circulation of physical paper money was invisible, but the flow of all digital assets had a "chain" to check. Yang Yanchao, a researcher at the intellectual property center of the Chinese Academy of Social Sciences, also believes that the biggest advantage of blockchain is that it has truly completed the credit construction in an anonymous society, bringing new opportunities to many fields, thus making various innovative applications possible
there is a long way to go in the future development
in terms of technology promotion, there is no big barrier to blockchain, which has been confirmed in the global practice of bitcoin, and its main resistance comes from the obstacles in concept and implementation
"on the one hand, the society may be very concerned about the" naked "state in the blockchain. Blockchain has built a "Skynet" for the commercial society. The company's economic activities are all recorded, so there is no secret to speak of. In this way, some business strategies may not be implemented under the blockchain. "
"on the other hand, the current legal system lags behind the development of information technology, so how to put the emerging blockchain technology under the legal supervision needs to be studied." Duan Yongchao said
the core of blockchain is decentralization, which will have an impact on the long-standing central management model. In addition to the law, how to establish a regulatory environment that can promote the application of blockchain technology, so that the technology can benefit the society and not be used to do evil, is also an urgent problem to be solved.
I. blockchain 1.0 cryptocurrency era (2008-2013)
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in 2008, Nakamoto first proposed the concepts of bitcoin and blockchain, and then in January 2009, the first blockchain came out. At this stage, people pay more attention to the transaction of cryptocurrency, and blockchain is only used as the underlying technology to act as a "public account book"< br />
2. Blockchain 2.0 smart contract era (2014-2017)
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in 2014, & quot; Blockchain 2.0 "has become the pronoun of decentralized blockchain database. At this stage, people mainly focus on the application of the platform. Anyone can upload and execute the smart contract on the blockchain, and will be rewarded automatically after the execution. Because this transaction process does not need any intermediary, so people's privacy has been greatly protected< br />
III. blockchain 3.0 large scale application era (2018 -)
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at this stage, people begin to build a completely decentralized data network, and the application of blockchain technology is no longer limited to the economic field, but expanded to the fields of art, law, real estate, hospital, human resources and so on.
The application prospects of blockchain are mainly in the fields of finance, Internet of things and logistics, public services, digital rights and insurance
1. Blockchain has great potential applications in international exchange, letter of credit, equity registration, stock exchange and other financial fields. The application of blockchain technology in the financial instry can eliminate the third-party intermediary link and realize the point-to-point direct docking
2. Blockchain can also be naturally combined in the field of Internet of things and logistics, which is considered as a promising application direction of blockchain. The establishment of credit resources in the blockchain can double improve the security of transactions and improve the convenience of Internet of things transactions. It can save time and cost for the application of intelligent logistics mode
3. Blockchain is closely related to people's proction and life in public management, energy, transportation and other fields. The decentralized and fully distributed DNS service provided by blockchain can realize the query and resolution of domain name through the point-to-point data transmission service between nodes in the network
4. Through blockchain technology, works can be authenticated to prove the existence of text, video, audio and other works and ensure the authenticity and uniqueness of ownership. After the works are confirmed on the blockchain, the subsequent transactions will be recorded in real time to realize the full life cycle management of digital rights, and can also be used as a technical guarantee in judicial evidence collection
5. In terms of insurance claims, insurance institutions are responsible for fund collection, investment and claims settlement, and often have higher management and operation costs. Through the application of smart contract, there is no need for the applicant to apply or the insurance company to approve. As long as the claim conditions are triggered, the automatic claim settlement of the policy can be realized
extended data:
the core technology of blockchain
1. Consensus mechanism, through the voting of special nodes, completes the verification and confirmation of transactions in a very short time; For a transaction, if several nodes with unrelated interests can reach a consensus, it can be considered that the whole network can also reach a consensus. The goal of blockchain consensus mechanism is to make all honest nodes keep consistent blockchain views
2. Asymmetric encryption requires two keys for encryption and decryption, which are public key and private key. The public key corresponds to the private key. The public key is used in the process of data encryption, and only the corresponding private key can be used to decrypt; On the contrary, the private key is used to encrypt the data, and only the corresponding public key can be used to decrypt the data
1. The status quo of legislation
network virtual property is still a new thing in China, and the relevant laws to protect it are relatively backward, and there is no definite legislation on the protection of network virtual property in civil law
(1) the relevant provisions of the Constitution and the general principles of civil law are relatively general, but provide space for their interpretation: after the amendment of the Constitution in 2004, the protection of citizens' legitimate private property was explicitly included in the constitution, which provides a great space for the interpretation of civil law property According to the general principles of the civil law, "a citizen's personal property includes his legal income, house, savings, articles for daily use, cultural relics, books and materials, trees, livestock, and other means of proction and other legal property permitted by law." It is not clear that the network virtual property should be included in the personal legal property. However, there is no clear explanation for "other legal property" in China's law, which also provides space for us to interpret it
(2) the protection of network virtual property in the decision on maintaining Internet security is still unclear: Article 4 of the decision stipulates: "in order to protect the personal and property rights of indivials, legal persons and other organizations, those who commit one of the following acts, which constitute a crime, shall be investigated for criminal responsibility in accordance with the relevant provisions of the criminal law... Theft, fraud, illegal use of the Internet "Extortion" and Article 6: "anyone who uses the Internet to infringe upon the legitimate rights and interests of others, which constitutes a civil infringement, shall bear civil liability according to law." The "decision" on the protection of network virtual property is still not clear, but also does not negate the protection of network virtual property, which also provides space for judicial interpretation
from the above legislative situation, China has no clear legal provisions for the handling of such cases, and has not carried out special legislation like South Korea, the United States and Taiwan. After the occurrence of network virtual property disputes, the disputes can not be solved in a timely and effective manner, which has brought great hidden dangers to the security of the Internet. Network virtual property disputes continue to emerge, calling for the relevant legislation and judicial as soon as possible< From the judicial point of view, the civil legal protection of network virtual property mainly involves the following aspects:
(1) the existing burden of proof sharing is obviously unfavorable to players
in civil litigation, generally speaking, it is "who claims, who provides evidence", If the party who claims the right can not provide the corresponding evidence to support his claim, he will bear the adverse consequences of litigation, and the civil dispute of network virtual property is no exception. In the online game environment, most players use the registration information is not real, in this case, not only to prove that they are the real owner of the ID, but also to prove that they lost the type and quantity of network virtual property. Due to the virtual characteristics of online games, the burden of proof is difficult for the players, which is obviously disadvantageous to the players. Because the operation and transaction of network virtual property are all dynamic, after the loss of network virtual property, it is difficult for players to find the relevant traces, and it is even more difficult to prove their legal ownership< (2) it is difficult to determine the value of network virtual property. At present, there is no unified standard for the evaluation and calculation of the value of network virtual property, so it is difficult to get fair compensation after disputes< (3) it is difficult to apply the existing evidence rules to the confirmation of evidence in the case of network virtual property. In essence, network virtual property is just a set of data stored in the computer, one of its characteristics is that it can be copied infinitely. On the other hand, because the game server is always in a state of high-speed movement, it brings considerable difficulties to the fixation of evidence. Once the network virtual property disappears or is deleted by the operator, it is not easy to find the evidence related to the case Article 69 of the regulations on evidence in civil procere clearly stipulates that the following evidence can not be used as the basis for determining the facts of the case alone: (4) copies and reproctions that cannot be checked with the original or the original. " As far as the network virtual property is concerned, it is difficult to distinguish the original and the of the evidence provided by the plaintiff and the defendant in the form of the network virtual property itself, pictures and screenshots. Obviously, it is difficult to apply the existing rules of evidence in the case of network virtual property. A good solution to this problem depends on the breakthrough of the existing rules of evidence in legislation or judicial interpretation
in judicial practice, the basis of coordinating or dealing with disputes related to online virtual property is the previous agreement between players and online game companies, as well as the theory of civil law, combined with the rules of online game itself to choose the applicable jurisprudence. This also reflects the principle of law application in China: there is law, according to law; There is no law, according to convention; There is no convention, according to the law. Just because the basis of dealing with disputes is some legal theories, rather than specific legal provisions, the basis of solving online virtual property disputes in online games lacks legal authority. It can be seen that the current situation of civil law protection of network virtual property in China is not very optimistic. The legal circle should pay more attention to it and improve the existing civil legal provisions in order to stabilize the social legal environment.
The sudden epidemic situation has pressed the "pause" button for many instries, but science and technology is the most effective means to fight against disasters. Blockchain technology has realized the combination with finance, logistics, supply chain, government affairs, public welfare, urban management and other application fields. At the same time, e to the imperfect development of technology, the role of blockchain in the prevention and control of the epidemic is very limited, so we need to explore deeper scenario applications
from the survey data, the main application directions of instrial blockchain in the post epidemic period include: traceability, financial (including insurance) supervision, collaborative sharing. Deposit certificate, digitization, credit investigation, digital asset transaction, etc
in the main application direction of instrial blockchain in the post epidemic period, more than 70% of enterprises choose traceability and financial (including insurance) supervision, in addition to collaborative sharing and certificate deposit. Digital also has more than 60% of the enterprise choice, compared with the low choice rate of credit reference and digital asset transaction, in which the choice rate of digital asset transaction is less than 50%, only 48%
to avoid risks and promote the healthy development of instrial blockchain
as an emerging technology development direction and instrial development field, blockchain has been widely concerned. The application of instrial blockchain is accelerating, which is mainly reflected in two aspects:
first, in the past, open source systems were represented in technology, and most of them were open source projects oriented to consumers, but now many projects oriented to instry and enterprise characteristics have been added; At the same time, more and more enterprises such as Internet giants and high-tech enterprises begin to enter this field, indicating that the era of instrial blockchain has come
secondly, the emergence of blockchain reces the threshold of trust and the cost of realization, enabling some financial and trade scenarios that could not be realized before to be realized. In this way, some new financial forms can be derived, providing more space for financial innovation
although the application of instrial blockchain is speeding up, it is still in an early stage of development. This is mainly reflected in the fact that blockchain technology alone can not fully solve the trust problems and information island problems between entities, and the emergence of blockchain technology also puts forward new problems for the current law and regulation
because of its decentralized and difficult to tamper with characteristics, blockchain has become a comprehensive subject driven by technology and deeply affecting economy, finance, society, organizational form and governance. In addition, blockchain technology is not yet fully mature in system stability, application security, business model and other aspects, which puts forward requirements for privacy protection and storage capacity of data on the chain
it should be noted that the current blockchain instry has been involved in many technical fields such as it, communication, security, cryptography and so on. What it needs is a kind of compound talents, which poses new challenges to personnel training and school ecation
the short-term impact of blockchain should be treated calmly to avoid overestimation. At the same time, it is necessary to further strengthen laws and regulations and supervision to avoid the possible risks of blockchain technology, so as to promote the healthy development of instrial blockchain
- for more data sources and analysis, please refer to the analysis report on China's blockchain instry market outlook and investment strategic planning of foresight Instry Research Institute
for a single (domestic) central bank, bitcoin can be regarded as a "foreign exchange currency", and bitcoin will not be affected by the central bank's monetary policy. From this perspective, bitcoin is bound to bring about the so-called currency competition. When American tourists travel abroad, they will encounter the experience of exchanging foreign currency with unofficial exchange rate. The original intention of local people to exchange dollars may be to avoid the impact of high inflation (inflation tax)
if this kind of exchange can be "carried forward and widely used", the government's way of using inflation tax to increase fiscal revenue will be limited, and the traditional foreign exchange control will lose considerable effect. As long as there is Internet or telephone, people can use digital currency as the exchange medium<
challenge global currency status
although bitcoin is unlikely to replace the world's major currencies in the short term, bitcoin still has the opportunity to play a leading role in some specific occasions. The status of US dollar is obvious in many countries in the world, but the liabilities created by foreign banks under US dollar denominated deposits have brought jurisdiction problems. If the Bank of America further provides bitcoin denominated loans and accepts the redemption of bitcoin, what should the regulatory authorities do? In fact, there are similar signs in the euro dollar market today
in other words, at a time of financial crisis, if the market wants bitcoin deposits instead of US dollar deposits, then the central bank's status as "lender of last resort" in the traditional sense will be completely lost
acting as a safe haven asset
a safe haven asset does not mean a risk-free asset, but refers to the asset that investors are willing to pour in at a time of crisis. In the 1970s, real estate was a safe haven asset; In the 21st century, American debt has become a safe haven asset. Can bitcoin become the next key safe haven asset? The answer may be yes or no. But looking back on the dominant position of CUF in Hungary's mortgage loans in the time of the euro zone crisis, bitcoin obviously has a chance to become famous in the first World War: under the background of dollar inflation and bitcoin deflation, the US dollar / bitcoin exchange rate will plummet because the US Federal Reserve can't expand the supply of bitcoin
play the role of securities
in a perfect macroeconomic model, securities trading should be seamless. However, under the influence of monetary policy, the liquidity of OTC transactions of bonds is very poor. Even the ten-year US bonds with the best liquidity have had liquidity problems. Demand for good quality collateral, usually treasury bonds, has soared. If blockchain technology is mature enough, it is likely to bring billions of dollars of collateral supply to the market. Of course, lower demand for treasury bonds may lead to higher interest rates
maintain the stability of financial market
there is a view that the use of blockchain will lead to the withdrawal of global central banks from the stage of history. This possibility naturally exists, but in the short term, it is not too realistic - the central bank needs a lot of hard assets, such as real estate and human capital, to find liquidity carriers / media to completely retreat from the background
there is also a view that blockchain technology will make the financial market completely transparent, thus bringing a more robust financial system. However, it should be pointed out that the mainstream diamond and davige bank squeeze model does not rely on the opacity of the financial market. In theory, the bank's portfolio is completely transparent. But even so, unexpected large-scale redemptions can still cause problems in the financial system
the central bank's digital currency / cash
the current currency and payment structure were formed before the birth of the Internet. The world has changed dramatically, so people must learn to adapt. There is no reason to refuse the possibility of central banks providing digital currency. Before bitcoin, the U.S. Treasury provided online digital bond accounts. Although this kind of account is not used for payment system, it can be applied in theory
the digital account of the central bank has many advantages. First, depositors no longer need deposit insurance because there is no default risk in the central bank; Second, money managers who hold a lot of money can choose the central bank account as overnight deposit instead of shadow banking; Third, the cost of paper money supply will be completely eliminated; Fourth, it will be very convenient for the central bank to pay depositors' interest to facilitate the transmission of the central bank's monetary policy
practical application
Bubi blockchain has made a number of breakthroughs in the technical platform, which can meet the scenario of tens of millions of users, and has the ability to quickly build the upper application business. Bubi blockchain has been applied in equity, supply chain, points and other fields, and is concting experiments and application tests with exchanges and banks. As an integral application on Bubi blockchain platform, Shubei Hebao has been launched recently. Sunshine insurance, as the first large financial institution in China, issues blockchain integral (yangguangbei) on this platform, which is a good example for the landing application of blockchain technology in various instries
blockchain technology will have a profound impact on the financial instry and have an important impact in a long time. People will witness the profound changes in reality one by one.
the formation of blockchain instry was once closely related to the birth and development of bitcoin, but blockchain is not equal to bitcoin and other digital coins. After the boom of bitcoin and other virtual currencies graally subsided, countries have begun to realize the real value of blockchain as an emerging underlying computing technology, and have accelerated the strategic layout. Globally, the application scenario of blockchain has basically realized the extension from the initial digital currency and mining machinery manufacturing to financial services. At present, it is developing to supply chain, digital right, food and drug traceability and other fields
key R & D directions of China's blockchain technology include large-scale consensus algorithm, smart contract technology, software and hardware privacy protection, cross chain protocol, blockchain storage, etc. Among them, there are high R & D bottlenecks in large-scale consensus algorithm, cross chain protocol, blockchain storage and other technical fields. At present, smart contract technology and cross chain protocol have been applied in depth, and can significantly improve the efficiency of blockchain application
the instrial structure of blockchain tends to be convenient for developers: through any service network portal, blockchain application developers can purchase cloud resources with TPS (transactions per second), storage capacity and bandwidth as charging standards at any public city node in the world. Users can choose any underlying framework that has been adapted to develop, deploy and operate blockchain applications with extremely low cost and convenient operation
the underlying framework of alliance chain will become the mainstream service in the instry: most of the underlying frameworks of alliance chain adopt the concept of LAN deployment, and each underlying framework of alliance chain complies with a series of unified standards when adapting to the service network, such as key algorithm and gateway SDK. Developers can use the same key certificate to access different applications of different underlying frameworks through authorization
the Xueshuo innovation blockchain Technology Workstation of Lianqiao ecation online is the only approved "blockchain Technology Specialty" pilot workstation of "smart learning workshop 2020 Xueshuo innovation workstation" launched by the school planning, construction and development center of the Ministry of ecation of China. Based on providing diversified growth paths for students, the professional station promotes the reform of the training mode of the combination of professional degree research, proction, learning and research, and constructs the applied and compound talent training system.