Blockchain US financial attack

1.

On August 6, 2018, Mr. Cai Yi, financial instry consultant of Huawei Company and founder and CEO of Huaxuan technology, was in daga | blockchain & amp; AI (core group) made a special topic sharing, the theme is: the current situation and Prospect of blockchain finance. The following text is arranged according to the speech of the lecture and has been reviewed by the author

Cai Yi: Consultant of financial instry of Huawei, founder and CEO of Huaxuan science and technology, founder of shared reading association, member of China Writers Association, engaged in financial science and technology research for more than ten years, and is a senior expert in digital transformation of banks

good evening, everyone. I'm very glad and honored to share some thoughts with you here

let's make a simple self introction: my name is Cai Yi. I worked as a writer in my youth. I wrote some books, magazines and novels in the 1990s. At that time, there was no Internet. After work, I have been engaged in the information work of financial instry, from financial channels to data centers, from outlets to technology, witnessed the development of financial technology, and also found some problems. After 2014, I worked as an investment partner and in recent years as a financial instry consultant in Huawei. From the cognitive level, I worked as a consultant for the talent development of digital transformation in the financial instry

in 2015, I started Huaxuan technology and sharing reading club. At present, we mainly focus on the cognition of blockchain and the implementation of financial technology solutions. At the cognitive level, interactive sharing and knowledge management are carried out in the way of book club. At the technical level, the process and scene of the financial instry are reshaped by combining blockchain, big data and AI technologies. I am interested in blockchain and often study and discuss with some friends. Of course, some views are still superficial. I hope you can exchange more criticisms and corrections

the elite think tanks in the United States once believed that the core of maintaining global leadership is science and technology, which must rely on economy, and the core of economy is finance. So what is the future of finance

today's topic is: the current situation and Prospect of blockchain finance. I would like to introce it mainly from three aspects:

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briefly introce finance and financial system

the current situation of blockchain finance

prospect of blockchain finance

First of all, let's talk about the concept of finance. The word "finance" originated from Japan after the Meiji Restoration (1868), which is somewhat related to the gold standard established by Japan in 1897. At the beginning of the 20th century, it was introced into China from Japan. It was first proposed by Finance Minister Liang Qichao in 1902. At that time, Zhang Zhidong raised his objection. Therefore, after the Sino Japanese War of 1894, China remained in the silver standard, but it also made China avoid the Great Depression of 1929

The original meaning of finance is "money accommodation", which refers to the circulation of funds in the society. Later, its meaning has been expanded to indicate transactions and economic activities related to money and credit. In fact, there is another reason: gold used to be the only medium in international trade, and its value and wealth were based on gold. Therefore, when making standard gold bars, people need to melt gold into shape, which may be the original meaning of the word "finance", that is, to melt metal

Finance is the general name of currency circulation and credit activities and the economic activities associated with them.

let's look at the definition of Finance later: finance is the general name of currency circulation and credit activities and the economic activities associated with them. In a broad sense, finance generally refers to all the economic activities related to the issuance, custody, exchange, settlement and financing of credit currency, Even including the trading of gold and silver, the narrow sense of Finance specifically refers to the credit currency financing

In short, the contents of finance can be summarized as the issuance and withdrawal of money, the absorption and payment of deposits, the issuance and recovery of loans, the trading of gold, silver and foreign exchange, the issuance and transfer of securities, insurance, trust, domestic and international currency settlement, etc. To put it more bluntly, finance has two-way feedback. The institutions engaged in financial activities mainly include banking, insurance, securities, trust, financial leasing, etc. We all know this better and have frequent contact with it. Therefore, to understand the meaning and institutions of finance, we also need to understand China's financial system

2 China's financial system the development of China's financial system can be roughly divided into five stages:

initial formation stage, the first five years (1948-1953): the establishment of the people's Bank of China (1948). At this time, the PBC is far from what we want now. But it marks the beginning of new China's financial institution system

In the second five years (1953-1978), the people's Bank of China (PBC) is the only financial institution in China that deals with all kinds of banking business, integrating the central bank and ordinary banks. In fact, reunification means that we the model of foreign countries. I will not talk about specific countries

In the third five years (1979-1983), the Bank of China (established in 1912), the Agricultural Bank of China (established in 1951) and the Construction Bank of China (established in 1954) were restored or established one after another, but the people's Bank of China still integrates currency issuance and credit. We can see that after the reform and opening up, China's financial instry has developed very fast

the diversified financial institution system has begun to take shape. Ten years (from September 1983 to 1993): it has formed a financial institution system with the people's Bank of China as the core, the four major professional banks of instry, agriculture, China and construction as the main body, and other financial institutions coexisting and cooperating. After 1987, there were Bank of communications, China Merchants Bank, Shenzhen Development Bank, CITIC and Hengfeng. In 1988, Ping'an, Guangfa and Xingye appeared. Everbright, Huaxia and Shanghai Pudong Development Co., Ltd. appeared in 1992, and the Securities Regulatory Commission was set up in the same year

the stage of building and improving the social * * market financial institution system (since 1994): it has formed a relatively complete financial institution system with "one bank, three meetings" as the leading role, large, medium and small commercial banks as the main body, and a variety of non bank financial institutions as the auxiliary wing. In 1994, three major policy banks (China Development Bank, Export Import Bank of China and Agricultural Development Bank of China) were established. In 1995, Minsheng Bank, the first private commercial bank, was established (which is of great significance). In 1998, urban commercial banks emerged and CIRC was established. In fact, the CBRC appeared relatively late, and it was only established in 2003. Since then, the pattern of "one party, three meetings" has been formed. However, not long ago, the China Banking Regulatory Commission and the China Insurance Regulatory Commission merged into the China Banking and Insurance Regulatory Commission. You can pay attention to this

from the perspective of evolution, the normative research of finance is often linear

that is, we often take a certain evolution form as the standard (usually developed market economy system, such as the Soviet Union, Germany, the United States and even Japan), describe the progress path of the financial system from non marketization to marketization, from inefficient allocation of financial resources to efficient allocation, and focus on explaining the gap of the standard form and the reasons

In fact, we can find from the development process of China's financial system just now: since 1978, China's financial system has evolved in the direction of marketization, standardization, diversification and internationalization, All kinds of financial institutions show a "network" and "strong connection" business form, that is, the connection degree between banks, banks and other financial institutions, as well as financial sub markets has increased significantly, and the credit connection is increasingly close, mixed and complicated

the ecological environment of financial instry has also undergone some obvious changes. On the one hand, traditional formal financial institutions seek to speed up transformation and innovation, and strive to seize the opportunity in business strategy, market positioning, management structure, format and proct innovation. On the other hand, a large number of emerging financial institutions have emerged

financial format also presents new characteristics such as real estate financialization, non bank institutions "banking" and asset securitization

The above changes are beyond the imagination of the instry, regulators and policy makers, and will bring a series of impacts:

on the positive side, the scale and composition of the financial system have been expanded, the business expansion and financial service capacity of financial institutions have been improved, the financial market has been developed, and innovative payment has developed rapidly. That's what we're going to talk about in financial technology

in a common saying, when the forest is big, there are all kinds of birds. The negative aspects are mainly reflected in the following aspects: the interaction between the

financial system and the real economy tends to be complex, and the role of the financial system in promoting and amplifying asset bubbles is underestimated. p>

the reticulation and strong correlation of the financial system widen the gap between the financial instry and financial supervision, and weaken the effectiveness of traditional supervision. China's current financial supervision system has only been in operation for more than ten years

the transmission path and mechanism of monetary policy through the financial system have changed (the transmission chain of monetary policy has been lengthened or deformed, the conctivity and effectiveness have declined), and the initiative and effectiveness of regulation are facing new constraints. Since its establishment in 1996, the current monetary policy framework has been constantly improved in response to the development of economy and financial market, but the complexity of the financial system in recent years has put it to a new test. Broad money M2 is also impacted by financial deepening, electronic payment and other factors, and further weakened by the shadow banking system

all kinds of cross market, cross business and cross-border behaviors to evade supervision make a variety of risk factors intertwined, such as: capital pool operation with serious mismatch of maturity and procts hides large liquidity risk, proct nesting leads to risk transmission, insufficient shadow banking supervision, local debt, real estate, external shocks, etc., all of which bring great challenges to the stability of the financial system

without comparison, there is no harm, and China's financial system as a whole is relatively backward. This kind of backwardness is mainly reflected in the backwardness of bank innovation: the people's Bank of China announced in October 2015 to abolish the "interest margin protection", while the interest rate of the United States had been completely marketized as early as April 1986, and China was nearly 30 years late

3 the institutional framework and basic problems of China's financial system

Second, the * * third party acts as a credit intermediary to guarantee the realization of asset transfer transactions

the third is the transaction settlement and clearing completed by the centralized clearing organization

Based on this, there are also four problems:

1) credit system and trust mechanism. Traditional finance must have strict transaction records to accumulate credit. Without transaction records, it is difficult to achieve financing or loans, because there is no technical means to ensure the safety of transactions between the two sides

(2) transaction settlement takes a long time. The time of traditional financial transactions has been speeding up, but the settlement time is still relatively long, especially for cross-border transactions, which often can not arrive immediately

(3) the cost of intermediary service is high. The traditional financial transaction system is very important

2.

Fried coins or something

at present, the application of blockchain technology is virtual currency. Therefore, virtual currency is also known as the first real birth proct of blockchain. The popularity of virtual currency is also obvious to all, which has set off a frenzy of investment in many countries. According to foreign media reports, the number of virtual currency transactions in the United States has reached 5 million; South Korea is estimated to be the craziest nation in the world, with one in every 50 people speculating, and 31% of the working class buying and selling virtual currency; Venezuela has also issued the world's first virtual currency with the nature of national sovereignty - oil currency

with the popularity of virtual currency, market investors are not only satisfied with the conventional trading mode of buying low and selling high, but also actively seek more simple and convenient trading ways to obtain more profits. The virtual currency trend trading method was born and successfully captured the hearts of investors in a short time, becoming a major mainstream trading mode

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, the trend trading method of virtual currency is exclusively launched by speedxo, an international financial service provider with deep experience. It mainly deals with the currency pair composed of virtual currency and real currency, and it can make profits as long as it is bullish or bearish. For example, if an investor trades in "bitcoin / US dollar", he or she only needs to judge whether the price will rise or fall after 30 seconds, and buy up or down according to the trend. If he or she buys in the right direction after 30 seconds, he or she can get 93% of the net income of the investment amount. It is this kind of rise and fall are profitable, time-consuming, no need to take advantage of the market, the trend trading method quickly swept the entire currency circle

3. Principle of blockchain: decentralized distributed accounting system
the core of blockchain technology is that all participating nodes jointly maintain the transaction and database, which makes the transaction based on the principle of cryptography rather than trust, so that any agreed parties can directly carry out payment transactions without the participation of a third party< br />?
technically, a block is a data structure for recording transactions, reflecting the capital flow of a transaction. In the system, the blocks of the transactions that have been reached are connected together to form a main chain, and all the nodes participating in the calculation record the main chain or part of the main chain. A block contains the following three parts: transaction information, hash formed by the previous block, and random number. Transaction information is the task data carried by the block, including the private keys of both parties, the number of transactions, the digital signature of electronic currency, etc; The hash hash formed by the previous block is used to connect the blocks and realize the sequence of past transactions; Random number is the core of the transaction. All miners compete to calculate the answer of the random number. The node that gets the answer the fastest generates a new block and broadcasts it to all nodes for updating, so as to complete a transaction

1.1 what is a blockchain

blockchain is a technical solution to collectively maintain a reliable database through centralization and de trust in the past. This technical solution mainly allows any number of nodes in the participating system to generate a series of data blocks by using cryptographic methods. Each data block contains all the information exchange data of the system in a certain period of time, and generates a data fingerprint to verify the validity of its information and link to the next database block< br />?
generally speaking, blockchain technology refers to a way for the whole people to participate in bookkeeping. There is a database behind all the systems, that is, a big ledger. So it's very important who keeps this account book. At present, whose system is responsible for bookkeeping, the account book of each bank is the account book of each bank, and the account book of each bank is the account book of Ali. But now in the blockchain system, everyone in the system can have the opportunity to participate in bookkeeping. If there are new transaction data changes in a certain period of time, everyone in the system can make bookkeeping. The system will judge the fastest and best bookkeeper in this period, write the recorded content into the account book, and send the content of the account book to all other people in the system for backup. In this way, everyone in the system has a complete account book. As a result, the data becomes very secure. Tamperers need to modify more than half of the system node data at the same time to truly tamper with the data. The cost of such tampering is so high that it is almost impossible. For example, bitcoin has been running for more than seven years, and countless hackers around the world have tried to attack bitcoin, but so far there have been no trading errors. It can be considered that bitcoin blockchain has been proved to be a safe and reliable system< br />?

1.2 why is there blockchain innovation

human beings need to communicate in the process of activities, and communication is based on information. In the past, information circulation was not convenient enough to meet the information needs of market participants, so the intermediary and center were born. This centralized system has the problems of high cost, low efficiency, scattered value, "information island" and unsafe data storage. However, e to technical and environmental factors, this system still continues to operate for many years until the emergence of the Internet. The starting point of the first generation Internet is TCP / IP protocol, which is to implement the open code of peer-to-peer transmission of information in a unified format of all nodes on the network, and to program, protocol and execute the basic values of freedom and equality needed by the global unified market. Internet eliminates the middle chain of low value and high cost, and realizes the low cost and high efficiency of global information transmission by decentralization< br />?< However, the first generation Internet did not solve the credit problem of information. The activities that can be decentralized on the Internet must be those that do not need credit endorsement, and those that need credit guarantee must be those that are centralized and participated by third-party intermediaries. As a result, Internet technology, which is unable to establish global credit, has encountered great obstacles in its progress - people can not participate in any value exchange activities on the Internet in a decentralized way. In order to realize value exchange, people still need the third-party intermediary (such as bank, clearing, exchange) based on credit. There are still some problems in the global centralized credit system, such as high operating cost, low efficiency and vulnerability to attack. For example, the legal currencies of different countries have different credit values and different clearing systems, which increase the cost of Global trade< br />?
therefore, what the second generation Internet must break through is: how to decentralize the establishment of global credit? So that the value transfer is also low-cost and efficient. We need to create a kind of technology in the Internet, which can also engage in value exchange activities on the premise that people can't trust each other, so as to achieve real decentralization and go to the third-party intermediary, and realize the transformation from information internet to value Internet

1.3 application of blockchain

Bubi blockchain has been applied to equity, supply chain, points and other fields, and is carrying out experiments and application tests with exchanges and banks
as an integral application on Bubi blockchain, Shubei Hebao has been launched recently, which is a good demonstration for the landing application of blockchain technology in various instries

1.4 why the financial instry needs blockchain

trust is the foundation of the financial instry. In order to maintain trust, the development of the financial instry has spawned a large number of high-cost, low-efficiency, single point of failure intermediaries, including trusteeship, third-party payment, notaries, banks, exchanges and so on. Blockchain technology uses new encryption authentication technology and decentralized consensus mechanism to maintain a complete, distributed and tamperable account book, so that participants can ensure the security of funds and information through a unified account book system without mutual recognition and trust. This is of great significance to finance. Therefore, global financial giants are exploring blockchain applications one after another. On the one hand, this is to prevent the risk of being subverted; on the other hand, it is also "for our own use" to improve efficiency and rece costs, so as to consolidate, optimize and expand the existing power< br />?
first, blockchain can rece trust risk. Blockchain technology has the characteristics of open source and transparency. The participants of the system can know the operation rules of the system, verify the authenticity and integrity of the account book content and account book construction history, and ensure that the transaction history is reliable and has not been tampered with, which is equivalent to improving the accountability of the system and recing the trust risk of the system. For example, blockchain can avoid the current Internet Financial P2P running, fraud and other events< br />?
secondly, blockchain can improve the efficiency of payment, transaction and settlement. On the blockchain, the process of transaction confirmation is the process of clearing, settlement and auditing. Blockchain uses distributed accounting, all transactions are displayed in real time on a spreadsheet similar to global sharing, real-time clearing, and efficiency is greatly improved. For example, the U.S. securities settlement system is t + 3, but the blockchain can improve the efficiency to the minute level, which can rece the settlement risk by 99%, thus effectively recing the cost of capital and systemic risk< br />?
thirdly, blockchain can rece operating costs. Financial business systems and back office work are often faced with long processes and multiple links. Nowadays, no matter visa, master or all of them operate in a centralized way, money transfer has to go through a third party, which makes the cost of cross-border transaction, currency exchange rate, internal accounting and time cost too high, and brings risks to capital. Blockchain can simplify and automate the lengthy financial service process, rece the interaction between foreground and background, and save a lot of human and material resources, which is of great significance to optimize the financial business process and improve the financial competitiveness. The Bank of Spain believes that by 2022, blockchain technology will help the financial instry rece its bookkeeping costs by $20 billion< br />?
fourthly, blockchain can effectively prevent failures and attacks. The traditional financial model takes the exchange or bank as the center. Once the center fails or is attacked, the whole network may be paralyzed and the transaction will be suspended. The blockchain is supported by many distributed nodes and computer servers on the point-to-point network. The problems of any part will not affect the overall operation, and each node keeps a of the blockchain data. Therefore, the built-in business continuity of blockchain has high reliability and fault tolerance< br />?
fifthly, blockchain can improve the level of automation. Since all files or assets can be represented in the form of codes or ledgers, smart contracts and automatic transactions can be realized on the blockchain by setting the data processing program on the blockchain. For example, a smart contract can write a set of financial terms into the agreement to ensure the automatic execution and default payment of the contract< br />?
sixth, blockchain can meet regulatory and audit requirements. The records stored on the blockchain are transparent, traceable and unchangeable. Any record, once written to the blockchain, is permanent and cannot be tampered with. Any transaction between two parties can be tracked and inquired< br />?
in addition to the above positive effects on existing systems and business models, blockchain can also drive the birth of new business models. On the one hand, the characteristics of blockchain technology enable it to achieve some business models that are difficult to achieve in the centralized mode. On the other hand, blockchain greatly encourages the innovation and cooperation of the whole society through the opening and cooperation of source code. Of course, there will be a lot of problems and challenges in the application of blockchain in finance. This paper also thinks about the specific application

the working principle of blockchain technology is not difficult to understand. If we focus on the application research of specific blockchain technology, we can find that the working principle of this blockchain technology is ubiquitous.

4.

On June 8, 360 exposed the high-risk vulnerability of EOS, which caused a lot of hot discussion among networks. In the early morning of June 2, Beijing time, EOS officially acknowledged to the 360 security team and offered a reward of US $30000, strongly calling on the security community to work together to ensure the continuous improvement of EOS software security

360 exposed EOS vulnerability, if exploited, can control every node and every server in the EOS network, not only take over the virtual currency, various transactions and applications in the network, but also take over all participating servers in the node. It can be said that if someone makes a malicious smart contract, all the digital currencies in it can be taken away directly

the attack of EOS vulnerability can spread among multiple nodes and super nodes at the speed of seconds. The continuous propagation from the control node to the generation of new blocks is a continuous and chain explosion action. It is likely to take over all nodes and complete the operation in 20 seconds

imagine that when the attacker has obtained the supreme authority in the entire EOS network, it is equivalent to mieba putting together all six cosmic protoliths, and can change rapidly in the universe and do whatever he likes

source: China News

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6. According to McKinsey's analysis, the impact of blockchain technology is most likely to occur in the main application scenarios of payment and trading banking, capital market and investment banking business
digital currency: to improve the convenience of currency issuance and use, for example, the central bank plans to issue its own digital currency; Cross border payment and settlement: realize point-to-point transaction and rece intermediate costs; Bill and supply chain financial business: rece human intervention, rece costs and operational risks; Securities issuance and Trading: realize quasi real-time asset transfer and accelerate the speed of transaction clearing (European crowdfunding is a typical model); Customer credit investigation and anti fraud: rece the cost of legal compliance and prevent financial crimes.

7. Ignore is directly added to the panel, and ultimately participate in the damage settlement
that is, the panel physical attack = {(weapon physical attack power + physical attack power enchant + double attack left slot + pet and all kinds of buff basic attack power bonus) x (1 + Weapon Mastery ratio)} x (1 + power) ÷ 250) + ignore physical attack 2]
actual attack settlement = basic attack ×[ 1 + (self is strong - monster is anti) ÷ 220] x skill percentage x monster physical defense damage rection x physical attack class increase rate + ignore attack x skill percentage x physical attack class increase rate X map forced damage rection

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9. In a simple explanation, 51% attack is also called majority attack. It means that malicious miners control more than 50% of the hash rate of the blockchain network, and then attack the network and take over the blockchain network, so that criminals can reverse transactions, stop payment or prevent new transactions from being confirmed
for more information about 51% attacks, you can learn about them on the password finance network,