Block chain experiment of Chinese Academy of Sciences
blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. Blockchain is an important concept of bitcoin. It is essentially a decentralized database. At the same time, as the underlying technology of bitcoin, it is a series of data blocks generated by using cryptographic methods. Each data block contains a batch of information about bitcoin network transactions, Used to verify the validity of its information (anti-counterfeiting) and generate the next block
if such technology wants to be put into application, the biggest problem is the "Impossible Triangle problem"
that is, scalability, decentralization and security cannot be achieved at the same time, and only two of them can be achieved
most of the existing public chain projects in the market are difficult to put into use on a large scale
(1) distributed ledger, that is, transaction bookkeeping is completed by multiple nodes distributed in different places, and each node records complete accounts, so they can participate in monitoring the legitimacy of transactions, At the same time, they can testify together
different from traditional distributed storage, the uniqueness of distributed storage of blockchain is mainly reflected in two aspects: one is that each node of blockchain stores complete data according to block chain structure, while traditional distributed storage generally stores data in multiple copies according to certain rules. Second, the storage of each node in the blockchain is independent and has the same status, which relies on the consensus mechanism to ensure the consistency of storage, while the traditional distributed storage generally synchronizes data from the central node to other backup nodes[ 8]
no single node can record the account data separately, so as to avoid the possibility that a single bookkeeper is controlled or bribed to record false accounts. In theory, unless all the nodes are destroyed, the accounts will not be lost, so as to ensure the security of the account data
(2) asymmetric encryption and authorization technology, the transaction information stored on the blockchain is public, but the account identity information is highly encrypted, which can only be accessed under the authorization of the data owner, thus ensuring the data security and personal privacy
(3) consensus mechanism is how to reach a consensus among all accounting nodes to determine the validity of a record, which is not only a means of identification, but also a means of preventing tampering. Blockchain proposes four different consensus mechanisms, which are suitable for different application scenarios and achieve a balance between efficiency and security
the consensus mechanism of blockchain has the characteristics of "the minority is subordinate to the majority" and "everyone is equal", in which "the minority is subordinate to the majority" does not completely refer to the number of nodes, but also can be the computing power, the number of shares or other characteristics that can be compared by computers“ "Everyone is equal" means that when the nodes meet the conditions, all nodes have the right to put forward the consensus results first, and then directly recognized by other nodes, and finally may become the final consensus results. Taking bitcoin as an example, the workload proof is adopted. Only when more than 51% of the accounting nodes in the whole network are controlled can a nonexistent record be forged. When there are enough nodes in the blockchain, this is basically impossible, thus eliminating the possibility of fraud.
(4) smart contract, which is based on these trusted and tamperable data, can automatically execute some pre-defined rules and terms. Take insurance as an example. If everyone's information (including medical information and risk occurrence information) is true and reliable, it is easy to carry out automatic claim settlement in some standardized insurance procts
blockchain technology does not rely on additional third-party management institutions or hardware facilities, and there is no central control. In addition to the self-contained blockchain itself, each node realizes information self verification, transmission and management through distributed accounting and storage. Decentralization is the most prominent and essential feature of blockchain< Second, openness:
the foundation of blockchain technology is open source. In addition to the private information of all parties to the transaction is encrypted, the data of blockchain is open to all. Anyone can query blockchain data and develop related applications through the open interface, so the information of the whole system is highly transparent< Third, independence:
based on consensus specifications and Protocols (similar to various mathematical algorithms such as hash algorithm used by bitcoin), the whole blockchain system does not rely on other third parties, and all nodes can automatically and safely verify and exchange data in the system without any human intervention< Fourth, security:
as long as 51% of all data nodes cannot be controlled, the network data cannot be arbitrarily controlled and modified, which makes the blockchain itself relatively safe and avoids subjective and artificial data changes
5. Anonymity:
unless there are legal requirements, technically speaking, the identity information of each block node does not need to be disclosed or verified, and information transmission can be carried out anonymously
Digital China is the first major development strategy explicitly put forward in the report of the 19th National Congress of the Communist Party of China. The application of digital technology represented by cloud computing, big data and mobile Internet is no longer limited to the economic field, but widely penetrated into all aspects of public services, social development and people's life, which requires macro coordination, overall control and integrated development
with the deepening of a new round of scientific and technological revolution and instrial change, the tide of digital economy in the world is unstoppable. The development of digital economy has become a global consensus, known as the key to the fourth instrial revolution
adhering to the connotation of the University of nice's world inclusive humanistic spirit, always embracing change, standing up to the tide, conforming to the development trend of the digital economy era, and integrating the essence of Chinese and Western cultural thinking, the University of nice's doctor of blockchain and digital economy management (DDE) came into being
based on this, we can enable the managers of digital economy instry to have global vision and global integration thinking, integrate knowledge, operate digital economy intelligently, promote the sustainable development of the instry, and contribute to the community of human destiny. Therefore, DDE project will cooperate with colleagues in the field of digital economy
if you have MBA related questions, you are welcome to contact me personally&# 180;&# 65381;&# 7447;&# 65381;` ) Bixin~~~~
Abstract: ALD China brand official Ms. Wenqi and borderless unbounded vice president Mr. Martinez reporter: it is understood that ALD should be a project with perfect technical background. What makes you decide to cooperate with unbounded? Wenqi: we must choose to cooperate with unbounded. We think that the emergence of "unbounded" is not only for me...
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ALD China brand official Ms. Wenqi and borderless unbounded vice president Martinez
reporter: it is understood that ALD should be a project with quite perfect technical background, What made you decide to cooperate with unbounded
Wenqi: we must choose to cooperate with unbounded. We believe that the emergence of "unbounded" not only brings us the subversion of visual habits, but also its decentralized structure bears greater responsibility and significance for the development of blockchain technology. We are full of confidence that unbounded will climb to the higher peak of blockcompany. From a technical point of view, it may be difficult for you to imagine a mission of near extreme fairness that other technologies that have been applied can not achieve. This boundless China tour is to inform all audiences of its convenience, safety, transparency, unlimited and other features. To use unbounded words is to "pay homage to the practice of the ideal market with the practice of technology"reporter: on the other hand, what do you think this tour can bring to China's blockchain enthusiasts and their technological development
Wen Qi: Although the tour has just completed three performances, the proction and organization process of the tour is very time-consuming and hard. The openness of unbounded platform means that we all want to join in and work together to give a satisfactory answer to the blockchain instry. Unbounded provides a lot of room for many blockchain technologists to give full play, and ALD is the best example. Each tour not only invited us, but also closely discussed with us after each meeting, providing us with many good ideas and suggestions. We welcome other teams like ALD to come to boundless, work hard and be happy together
reporter: as a participant and a person in charge of the technology sector, how do you think the brand values are reflected in this tour
Wenqi: in this tour, ALD brand directly entered the main body. I introced the brand new concept of ALD "brand the era of great health with science and technology" to all participants, and then improved the culture and connotation of our brand by opening up the topics in the discussion. The ideal of ALD is to combine technology with practical application. We have given a lot of great suggestions, and I think we have gained a lot
reporter: through this boundless tour, you believe that you have a lot of understanding and thinking about the concept of "boundless technology". Then, can you tell us why ALD itself should be applied to the big health instry
Wen Qi: for unbounded, technology is unbounded. This time, I have a deeper understanding of the meaning of the word "unbounded". With the continuous improvement of science and technology, the whole life span of human beings has greatly increased. Centenary is a common thing. People have put more attention on their own health quality, hoping to improve their own quality of life through scientific analysis, authoritative treatment methods and effective health preserving skills. This is not only a big topic, but also an issue that attracts the attention of the whole mankind, so we are ty bound. Our team has combed the big data of the medical system from another perspective before, so we have great inherent advantages in the field of big health. We firmly believe in the huge energy of blockchain technology. In the words of ALD, blockchain can edit everything. We use this technology to integrate health cases, drug anti-counterfeiting, cloud devices, hospital line solutions Insurance claims are integrated in series, which is an innovation of the times in the field of human health science and technology. We hope ALD can be really applied to more medical, pension and health care institutions. Finally, I wish boundless and our ALD better and better again through the media
blockchain projects are also projects. If you want to add value to your investment, you need to have the following aspects:
1, self-development ability, complete business system and investment guarantee mechanism. This is very important. Many projects do not mention the investment guarantee mechanism, which is to leave a way out for the future
PS: it's said that the project of global integral treasure is quite good. You can pay attention to it.
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center to; In innovation resources digitization, digital instrialization, instry digitization, digital social governance and other core technologies; Business, the introction of domestic and foreign Financial and material resources to build blockchain + digital economy instrial infrastructure and digital economy; State, response and response: 12132; Development and application of; End compound type - # 12040; Economic model such as talent training. At present, it has cooperated with the Department of science and technology of Yunnan Province and Yunnan Province; Department of information technology, Yunnan Bureau of digital economy, Yunnan Academy of science and technology, Kunming Science & Technology Co., Ltd&# 12068; Learning, Yunnan Normal University & Chen 12068; Xue, Yunnan Province, China; Instry and technology; Ministry of ecation, Ministry of ecation; Investment, cloud investment, Nantian information, etc; Close cooperation with the Institute of construction; Experts; Work station, Yunnan blockchain Key Laboratory, organize and carry out digital economy and blockchain training, and promote the development of digital economy and blockchain; The master controlled block chain of Beihang; Should be 12132;, Promote the development of digital economy and instrial upgrading in Yunnan Province, and realize the testing ground and gathering area of blockchain technology.
main learning contents and tasks:
1
2
3. Design system application scheme, process, model, etc
4. Test the function, safety and stability of the system
5. Operate the system application on the blockchain service platform
6. Collect and summarize the problems in the application of the system
7. Application, self use and promotion of blockchain system
different people have different opinions on the gold content. Now, with the rapid development of blockchain, it is better to learn more knowledge than to be abandoned by the times.