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Academician Chen chun: China's blockchain enabling industries need to solve four core technologies

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The first is the key technology of high performance, the second is the key technology of security and privacy, the third is the key technology of high availability, and the fourth is the key technology of high scalability.

Original title: "academician Chen chun: four core technologies to be solved in China's blockchain enabling industries"

Source: zhejiang university, renmin

As suddenly as the spring breeze came, blockchain once again entered people's vision and became the focus of real economy, financial capital and social public opinion.

Blockchain technology is leading a new round of global technological and industrial changes. However, what important breakthroughs need to be made in independent innovation of the block chain technology, which has just turned ten years old? How can blockchain play a role in promoting data sharing and optimizing business processes? How should blockchain technology guide and strengthen security risk prevention and control?

Around these questions, the reporter interviewed academician Chen chun, director of the information department of zhejiang university. Earlier, he made a report on the block chain issue at a group study session of the political bureau of the CPC central committee and talked about his opinions and Suggestions.

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There are four key technical difficulties in alliance chain

Villager zhang SAN lent 100 yuan to li si. In order to ensure the security of the loan, zhang SAN told the whole village about the loan through the village radio. After the villagers checked it point-to-point, they recorded the loan in their own books.

Through this simple analogy, academician Chen chun introduced the block chain with the main features of single point initiation, full network broadcast, cross-verification and joint accounting. "The whole process can be backdated and cannot be tampered with. Zhang SAN is not afraid of li si's default, because li si cannot change the account book of the whole village." Chen chun further explained that block chain is a billing system, which can be divided into public chain, alliance chain and private chain according to application scenarios and user needs.

Chen chun believes that in order to win the initiative of block chain technology development in China, it is necessary to vigorously develop domestic and independent controllable block chain technology platform, including the research on core technologies of alliance chain and public chain, and actively participate in international competition.

To promote the deep integration of blockchain and real economy and make "blockchain +" serve all walks of life, Chen chun believes that the development of alliance chain has a strong practical significance. He believes that there are still four core technologies in the current alliance chain that need to be broken through.

First, high-performance key technologies.At present, when block chain is applied in large scale or a large number of data nodes appear, the performance will decline sharply. At present, the domestic leading alliance chain technology can handle tens of thousands of transactions per second, but during the peak of the double 11 festival, aliyun's peak processing speed reached more than 300,000 transactions per second. There is still a gap in the magnitude of the two, which needs to be addressed by high-performance key technologies. Chen chun expressed the hope that through the high-performance consensus algorithm, efficient intelligent contract engine, can improve the consensus efficiency and security.

The second is the key technology of security and privacy.In China to use, first of all to fully support our encryption algorithms and standards. Business applications need the platform to support privacy protection of business data, such as namespace isolation to separate business data at the physical level, and a more granular privacy transaction mechanism that enables transactions to be verifiable but not visible. In addition, node key management and data encryption storage are implemented based on trusted execution environment to prevent file tampering.

The third is the key technology of high availability.This aspect includes the access mechanism of dynamic members, as well as the mechanism of quick recovery after node failure. The whole system cannot stop adding nodes, but should be dynamic in real time. There are also alliance autonomous management mechanism and efficient hot standby switching mechanism, which are also the key technologies after the alliance chain.

The fourth is the key technology of high scalability.Alliance chain should be convenient and applicable to each scenario, and must support the use of multiple programming languages. At the same time, it also needs to support multi-type, multi-organization data trusted storage, support cross-chain collaboration and so on.

For the problem of "block chain +" in large-scale application, Chen chun thinks the most important isSolve the problem of up and down the chain。

On the chain is the blockchain, and below the chain is all the traditional trusted information systems. How to embed the blockchain system into the current traditional trusted system to solve some of its problems, or conversely use the blockchain system to release the traditional information system? The need for data collaboration up and down the chain may be particularly important, requiring effective collaboration of data up and down the chain to ensure the relevance and consistency of data up and down the chain.

"Blockchain +" can do a lot to empower people

In the application scenario of block chain, China and the west choose two completely different ideas.

The development of blockchain in the west is basically based on financial innovation to drive innovation in other industries, while in China, in addition to financial innovation, more important is the application in various industries. Anderson said that China is speeding up technical support block chain in finance, the livelihood of the people, government, industrial manufacturing and other fields of application, key analysis block chain technology can solve business pain points and the application of the under different scenarios, common construction of ecological industry application, and to try to make block chain digital new momentum of economic development and the social credit system is an important support technology.

Accumulation fund center in China is the city of institutions, China does not exist a national accumulation fund management agencies. If we want to integrate these data, we can only use the traditional method of physical aggregation, which is not only time, high cost, but also difficult to solve the corresponding problem quickly. The application of block chain enables data in different regions to be easily transferred across the land to serve government affairs and people's livelihood.

The ministry of housing and urban-rural development has connected 491 provident fund centers across the country through the block chain, making it easy to operate in different places without centralized and unified data storage. "Technically, if there is no blockchain, it is very difficult for the provident fund center in hangzhou to transfer data from Beijing. But with blockchain, through data collaboration, it is easy and credible to transfer the provident fund paid by one person in Beijing."

It is an important direction of government service reform to let data run errands more. And with the use of blockchain technology, in Chen's words, the data does not have to run. This is because of the existence of smart contracts. Blockchain can keep data in each city, realize the sharing of data across cities, and save a lot of "trouble" of data running errands by synchronizing to corresponding nodes.

Why do Chinese Banks say it is difficult to make loans to small and medium-sized enterprises? It is not because they have no money, but because they need to provide asset guarantee or stock guarantee, or have other enterprises to guarantee it. All guarantees, contracts and coordination take time. Time is efficiency. If all this information is clearly visible in the chain, and Banks can decide for themselves whether to lend directly, then smes can make loans more efficiently. Chen chun introduced that zheshang bank "receivables chain platform" currently USES block chain technology, which has saved 80% of the audit time and reduced the cost by 50%.

It is understood that the block chain research center of zhejiang university has been able to basically provide domestic, independent, controllable and perfect support of China's guozhong algorithm, and provide systematic up-chain and down-chain collaborative service technology stack. The on-line services include large-scale trusted storage, and the number of cluster nodes can reach tens of thousands. In addition, the common cross-chain service that supports intelligent contract cross-chain interoperation and "data availability invisible" data sharing have been preliminarily realized.

But Chen chun also admitted that the block chain technology is climbing the slope, no matter every single point of technology or the whole system of technology is far from enough, he thinks China's block chain research still has a long way to go.

"Blockchain without regulation is like no traffic lights on the road."

The ideal for every driver is to have no traffic lights on the road so that the car can run fast, but it is not. This is just like the characteristics of decentralized, tamper-proof, non-erasable and low-cost in the public chain. It has become a new communication medium, but it may also become a hotbed for spreading harmful information and network rumors.

Chen chun pointed out that any good technology or tool needs to be used correctly in order to give full play to its value. "We believe that the blockchain, as an important underlying infrastructure, needs to attach great importance to regulatory security during its rapid development."

How does technology support regulation?

Chen chun gives his answer. To strengthen the block chain platform and application of safety assessment, compliance and fairness of the block chain drive technology and its application, to help establish and improve the regulatory system block chain, strengthen the ability construction of block chain regulation, jointly explore new models of block chain supervision regulation technology upgrades and efficiency, and reduce regulatory costs, to ensure that the industry development and regulation in parallel, to create environment for block the healthy development of chain technology.

Although the road of regulation is still very long, in Chen chun's opinion, because of effective regulation, China may use block chain on a large scale to promote economic and social development.

(wen ke yireng, wu yalan, lu shaoqing)

Source:https://rmh.pdnews.cn/Pc/ArtInfoApi/article?id=10544309