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Prof. Chen chun: new drivers of technological innovation and industrial change

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Because the block chain is open, transparent, traceable and hard to tamper with, all behaviors of a subject can be directly proved and confirmed through layers of message traceback, thus solving the problem of true information determinedly.

Author: Chen chun, professor of zhejiang university and academician of Chinese academy of engineering
Source: People's Daily

Editor's note: the political bureau of the communist party of China central committee held its 18th group study on the status and trend of blockchain technology on October 24. General secretary xi jinping stressed that the integrated application of block chain technology plays an important role in new technological innovation and industrial transformation when he presided over the study. We should take blockchain as an important breakthrough in independent innovation of core technologies, make clear the main direction of attack, increase input, focus on a number of key core technologies, and accelerate the innovation and development of blockchain technology and industry.

This edition publishes an article by academician Chen chun, introducing the relevant knowledge and application of block chain technology, hoping to help readers understand the pulse of science and technology and obtain cutting-edge new knowledge.

After 50 years of development, the traditional Internet has brought great changes to human society. Where will the Internet go in the next 50 years? Many researchers believe that it is likely to move from information Internet to value Internet and trust Internet. Information Internet solves information transmission and information sharing, but it cannot guarantee the authenticity of information. Whether it is artificial intelligence technology or big data analysis technology, the authenticity of the other side of communication on the Internet is only judged from probability. And the value Internet and trust Internet is to solve the real problem of information.

Blockchain is seen as an important support for value Internet and trust Internet

We can use accounting stories to explain blockchain, which is basically a new way of recording information. In a village, zhang SAN lent li si 100 yuan. He wanted to let everyone know about it and broadcast it through the village radio station. All the villagers hear the broadcast, receive the information, verify the authenticity of the information through their own way, and then record the information in their own books. As a result, all the villagers' accounts read "zhang SAN lent li si 100 yuan". Afterwards this loan has no dispute, also do not make false account possible. The accounting system is distributed or multicenter, with ledger data assembled into blocks in a chronological order. The blocks are connected to form what we call a blockchain. It's in chronological order, head to tail, traceable, but not tamperable, because they're encrypted. If it is tampered with, everyone in the village can verify it. This is the "consensus algorithm". This can also explain a core idea of blockchain: single point of initiation, full network broadcast, cross-auditing, and joint accounting. A series of technologies, including distributed architecture, consensus algorithms, smart contracts, etc. contribute to the realization of blockchain.

Because the block chain is open, transparent, traceable and hard to tamper with, all behaviors of a subject can be directly proved and confirmed through layers of message traceback, thus solving the problem of true information determinedly. A large number of "account checking" behaviors in the traditional technology domain due to distrust among different subjects are no longer needed under the distributed ledger consistency logic of blockchain. This is of great value to the integrity system of the whole Internet, and even to the integrity system in the real society. Reliable trust transfer can be realized through blockchain, which is regarded as the cornerstone of the next generation of value Internet and trust Internet. Although the blockchain is currently a new type of network based on the existing Internet and connected by application software, it will gradually sink to the basic layer of the Internet over time and integrate with the existing Internet to jointly build the next generation of Internet infrastructure. Technically, blockchain can be integrated with artificial intelligence, big data, 5G and quantum computing.

We helped develop the digital economy and the social credit system

When it comes to blockchain, bitcoin has to be mentioned. Blockchain originated in bitcoin, but has since expanded far beyond bitcoin. When bitcoin was born in 2009, block chain, an integrated innovation technology, was introduced based on cryptography, distributed computing and other technologies. However, in the world of bitcoin, COINS and chains are integrated, that is to say, block chain cannot be separated from the application of bitcoin. In 2013, the launch of ethereum community realized the separation of chain currency for the first time. On the underlying technology platform of block chain, the possibility of supporting any application has been realized, which is a significant technological leap. But both bitcoin and ethereum are public chains that anyone can participate in and are hard to police; It was not until 2015 that the global federation block chain appeared for the first time. Its biggest features are access control, excellent privacy protection and greatly improved performance.

From the current trend, the west block focuses on public chain chain technology development, application and industry development is mainly based on the public financial innovation chain, and the development of Chinese block chain technology key chain is controlled by alliance, application and industry with a focus on the block chain how to serve the industry economy, the government service and social management. Since this year, the alliance chain has been put into practice in many fields such as finance, law, medical care, energy and public welfare.

Some time ago, block chain technology helped the head office of China construction bank and the ministry of housing and urban-rural development complete the interconnection of provident fund centers in 491 cities across the country, ensuring clear data rights and responsibilities while achieving data synchronization, and effectively cooperating with the implementation of the detailed rules of the state council on the special deduction of individual income tax. Talents under the background of frequent flow of people across the region deal with accumulation fund business needs, in the past to achieve "connected", you may need to form a centralized management of data, the construction of centralized storage data of physical space, and through the block chain technology can keep data ownership in each accumulation fund center, 491 accumulation fund center node to join a union as a relatively equal block chain network, only through intelligent contracts, can share data.

Another example is small and medium-sized enterprise loan difficult problem. In the past, when companies wanted to borrow money, they had to provide asset guarantees or stock guarantees, or other corporate guarantees. All guarantees, contracts and coordination take time, which affects the efficiency of the loan. Now, if smes have orders or accounts receivable, they can turn the orders or accounts receivable into digital certificates on the block chain, which can be clearly seen by the bank to make a decision on whether to lend or not, greatly improving the efficiency of loan processing.

Goods traceability scheme based on block chain, can let the commodity producers, distributors, overseas delivery customs and international transportation, import customs and domestic logistics more parties jointly the commodity circulation information record to block chain, compared with the traditional sweep code traced, the whole information more open, transparent and credible, let consumers to determine their order of "overseas purchase" really come from somewhere. Block chain technology is also very useful for the thorny intellectual property protection issues in the judicial field. It can ensure that the rights of intellectual property are confirmed at the moment of generation and can be traded openly, transparently and credibly after the confirmation of rights. Without blockchain, when a music platform website tells the creator that a song is well written and has been downloaded 1,000 times this month, the creator may wonder: maybe 10,000 times? With blockchain, all transaction records are authentic and cannot be falsified by the platform.

It can be seen that blockchain has a large application space as long as it involves such features as certificate storage, trust, collaboration and non-tamperability. We should fully know the core values of block chain technology, actively explore and expand block chain technology in areas such as finance, the livelihood of the people, government, industrial application, the key analysis block chain technology can solve business pain points and applicable degree under different scenarios, pushing block chain application industry development, try to make chain blocks the development of the digital economy new kinetic energy and important support of the social credit system.

Research, application and supervision should be paid equal attention to

In the future, blockchain has a long way to go in technology research, industrial application and regulatory services. We will take the block chain technology development initiative, especially in order to achieve high performance, security and privacy, high availability and scalability of league chain core technology breakthrough, vigorously develop the domestic independent controllable block chain technology platform, the block chain system development and deployment aspect fully embody Chinese characteristics, rather than fully open source platform based on abroad.

To serve all walks of life and realize the large-scale application of "blockchain +", the first step is to solve the problems on and off the chain. Now we can't put chains on all of the data of information system are chain, in that case, storage capacity and processing performance will have a problem, but we may need to make sure that in the information system of authentic data acquisition "fingerprint" data, the data "fingerprint" on the chain, the chain chain link, so as to ensure reliable data in information system. For different application scenarios, it is necessary to study and solve the problems of analyzing which data are linked up and how to link the data on the chain with the information system on the chain.

As an important information infrastructure, block chain should attach great importance to security during its rapid development. Anyone can post information on a public chain such as ethereum at a very low cost, and the tamper-proof and decentralised nature of blockchain will make regulation much harder. The use of blockchain to spread harmful information and network rumors will adversely affect the application and development of blockchain technology. Use sharp tools wisely. It's like thinking that cars can go faster on the road if there are no police and no traffic lights. Only by improving the standardization of block chain technology application, improving the block chain regulatory technology, regulatory policy, regulatory capacity and regulatory mode, and ensuring the parallel industrial development and regulation, can we create a good environment for the healthy development of block chain technology.

Now people are interested in blockchain, there is a need to understand, this is a good thing. The introduction of relevant technology and the popularization of knowledge are therefore particularly important. In this respect, professional books and popular science books should cooperate with each other to meet the reading needs of different levels. In terms of my major, I recommend the book "progress and practice of block chain technology" published by the people's posts and telecommunications press. The book from the technical principle, market development, the government planning, the Angle of application scenarios and platform contrast block chain, panoramic analysis of three main blocks chain platform for further introduction, equipped with hands-on development guidelines, and provides the actual project case description and the source code, suitable for relevant technical personnel to study 1 block chain technology. Blockchain popular science books are also gradually launched, some focusing on the introduction of the basic principles and applications of blockchain, some focusing on the prediction of development prospects, and some focusing on the fintech field, whose book quality is yet to be tested by readers. As blockchain has been listed as an important breakthrough in China's independent innovation of core technologies, it is of great significance for the publishing industry to let more readers know the context of blockchain, understand the development process of Internet technology, and rationally view the impact and changes brought by technological progress on social life in an easy-to-understand way.

The original link: https://wap.peopleapp.com/article/4847260/4736639

Silver block rhythm BlockBeats reminded, according to the circ and other five departments issued in August 2018 on the guard against in the name of the "virtual currency" "block chain" illegal fund-raising risk warning "file, please the public rationality block chain, don't blindly believe in reduction commitment, set up correct concept of money and investment philosophy, effectively raise the risk consciousness; To the illegal crime clue that discovers, can report to concerned branch actively reflect.