Blockchain changes rules suddenly

1.

blockchain is an important concept of bitcoin. It is essentially a disintermediated 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 the information of a bitcoin network transaction, which is used to verify the effectiveness of its information (anti-counterfeiting) and generate the next block

blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies

in a narrow sense, blockchain is a kind of chain data structure that combines data blocks in a sequential way according to the time sequence, and it can not be tampered with and forged by cryptography

broadly speaking, blockchain technology uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, and uses cryptography to ensure the security of data transmission and access It is a new distributed infrastructure and computing method to program and operate data by using intelligent contract composed of automated script code

extended data:

the evolution mode of blockchain is as follows:

& 9642; Blockchain 1.0 - digital currency

▪ Blockchain 2.0 - digital assets and smart contracts

▪ Blockchain 3.0 - Implementation of distributed applications in various instries

blockchain features:

1. Disintermediation. Due to the use of Distributed Accounting and storage, there is no centralized hardware or management organization in the system, the rights and obligations of any node are equal, and the data blocks in the system are jointly maintained by the nodes with maintenance function in the whole system

2. Openness. The system is open. In addition to the private information of all parties to the transaction is encrypted, the data of the blockchain is open to all. Anyone can query the blockchain data and develop related applications through the open interface, so the information of the whole system is highly transparent

3. Autonomy. Blockchain adopts consensus based specifications and Protocols (such as a set of open and transparent algorithms) to enable all nodes in the whole system to exchange data freely and safely in a de trusted environment, so that the trust in "people" is changed into the trust in machines, and any human intervention does not work

The information can not be tampered with. Once the information is verified and added to the blockchain, it will be stored permanently. Unless more than 51% of the nodes in the system can be controlled at the same time, the modification of the database on a single node is invalid. Therefore, the data stability and reliability of the blockchain are extremely high

5. Anonymity. Because the exchange between nodes follows a fixed algorithm, the data interaction does not need to be trusted (the program rules in the blockchain will judge whether the activity is effective). Therefore, the counterparties do not need to make the other party trust themselves by disclosing their identities, which is very helpful for the accumulation of credit

2. Nodes are the places where the blocks are connected, and the blocks need to be chained to be useful
core analysis:
1. Transparency, 2. Openness, 3. Information can not be tampered with, 4. Decentralization,
5. Detailed analysis
blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. The so-called consensus mechanism is a mathematical algorithm to establish trust and obtain interests between different nodes in the blockchain system
1. In a narrow sense, blockchain is a kind of chained data structure composed of data blocks connected in sequence according to the time sequence, and it can not be tampered with and forged by cryptography
2. Broadly speaking, blockchain technology uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, and uses cryptography to ensure the security of data transmission and access It is a new distributed infrastructure and computing method to program and operate data by using intelligent contract composed of automated script code.

3. In one sentence, it is decentralization
blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies
the so-called consensus mechanism is a mathematical algorithm to establish trust and obtain interests between different nodes in the blockchain system
in a narrow sense, blockchain is a kind of chain data structure that combines data blocks in chronological order in a sequential way, and it can not be tampered with and forged by cryptography
broadly speaking, blockchain technology is a new distributed infrastructure and computing method, which uses blockchain data structure to verify and store data, uses distributed node consensus algorithm to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses intelligent contract composed of automated script code to program and operate data< Advantages:
1) the algorithm is simple and easy to implement
2) there is no need to exchange additional information between nodes to reach a consensus
3) it takes a lot of cost to destroy the system< Disadvantages:
1) waste of energy
2) it is difficult to shorten the block confirmation time
3) the new blockchain must find a different hash algorithm, otherwise it will face bitcoin attack
4) it is easy to generate bifurcation and needs to wait for multiple confirmations
5) there is no finality, and checkpoint mechanism is needed to make up for it.

4.

Blockchain is on fire! It's so hot that I have no friends! In recent days, it has been swished by various popular science jokes of blockchain, just like crowdfunding, equity and original stocks in the past two years. If you go out and chat with others, you will be embarrassed to chat with others if you don't talk about blockchain. Textbook like explanation: an intelligent peer-to-peer network that uses distributed database to identify, disseminate and record information. It is a distributed database system with different nodes and an open ledger

the concept of "after the rules are settled, everyone will register spontaneously" in wechat organization corresponds to the concept of "decentralization, no single user can control it" in the blockchain. "Registration in wechat group" in wechat group corresponds to the concept of "peer-to-peer network" in blockchain. "As long as the network is connected, we can know the latest progress" in wechat organization Bureau, corresponding to the concept in blockchain, namely "game mechanism"

5. The application of blockchain finance is the key field that it plays a role in reality. The financial instry needs such high-end technology, and the traditional mode of operation will have profound changes because of such technology. The application of blockchain finance has many distinctive characteristics, which makes people talk about it with relish. Moreover, it attracts people's attention because of the actual effect, which has a growing impact

Abstract: developed countries and technology companies have been ahead in the research and application of blockchain technology. From the perspective of patent application, there may be a gap of about one and a half years between China and the United States in terms of blockchain technology. Based on the above situation, how can China achieve "asymmetric" catch-up? First of all, we should see the situation clearly, seize the opportunity and meet the challenge. Secondly, after understanding the necessity of building the bottom layer of the blockchain for the existing business and future development of the financial instry, a consensus of "China's financial blockchain alliance" was reached among financial enterprises. Finally, we should work together to meet the change

how to understand blockchain

bitcoin: a peer-to-peer e-cash system. In 2009, after the paper was published, bitcoin was born as a virtual currency in the digital world of the Internet. At present, bitcoin's total market value is about US $6.5 billion. Although its market value is constantly changing, it is still the largest virtual currency in the world

another important concept is blockchain. Blockchain is an underlying technology of bitcoin, and bitcoin is only an application of blockchain. As we all know, bitcoin can achieve point-to-point value transmission. In addition to bitcoin blockchain, there are many other blockchains, such as Ethereum blockchain. Therefore, we should distinguish the concepts of bitcoin, bitcoin blockchain, blockchain and blockchain technology

at present, there are several misunderstandings about blockchain. Blockchain can be described in English as "decentralized blockchain", in which decentralized is translated as "decentralized". However, I think that the blockchain has realized the value dissemination without intermediary, that is, the point-to-point value dissemination. This does not mean that after entering the era of blockchain, there is no need for the center, but it should develop from a single centralization to the parallel between centers. Then, the existing center is likely to become a sub center or weak center. At present, all banks have their own data centers. If the financial blockchain alliance is established in the future, they can become the nodes in the blockchain alliance, so the blockchain does not need a center<

blockchain does not need credit

we often see some articles that think that blockchain is to "de credit". In fact, blockchain is to build trust through consensus algorithm and ensure the correctness of transactions through consensus among nodes. Build trust with low cost through mathematics and algorithm, rather than "de credit". However, the digital asset transaction between people does not need two people to know each other, or trust each other, and does not need a third-party credit institution. It only needs everyone to trust the trusted network of blockchain

why is it credible? Because it is a distributed database, there is a set of consensus based mechanism: a set of encryption algorithm, making it tamperable. On the one hand, the public key makes the information transparent and traceable; On the other hand, private key can protect privacy

blockchain is not a mature technology, nor is it omnipotent. At present, blockchain technology is still in the early stage of development. At the beginning of this year, we sent a delegation to study in the blockchain Research Laboratory of Barclays in South Africa. At the seminar, experts on the African blockchain of Barclays believed that it would take at least five to ten years for the blockchain technology to become a truly mature technology. At present, blockchain has the disadvantages of relatively slow computing speed and small storage space, and not all data processing needs to use blockchain

the research and application of blockchain in foreign countries

we find that the old financial developed countries have been ahead in the research of blockchain technology. The British government believes that it is very important for the government to participate in the legislation of digital currency and blockchain network, and encourages in-depth research on blockchain technology. The UK government is actively evaluating the potential of blockchain technology and considering using it to rece financial fraud and cost. In addition, the UK government plans to develop applications that can be used between the government and public institutions

in February this year, the European Commission put crypto digital currency at the top of the fast development target area, which promoted the policy research of various institutions on digital currency. Technology companies are also ahead in the research of blockchain technology

IBM launched the "open ledger project" to develop enterprise level blockchain software structure, promote the commercial use of blockchain technology, and support the docking of external data through the bluemix and API infrastructure of IBM cloud computing platform. IBM still has a lot of practice in blockchain technology. Recently, it and a South Korean company have made creative experiments using blockchain technology and Internet of things, and achieved some results

Microsoft uses Azure Platform to provide users with "blockchain as a service", which enables R3 and its bank members to speed up the process of experiment and learning, and accelerate the development, testing and deployment of distributed accounts

Intel also released sawtoothlake, an efficient molar platform for building, deploying and running distributed ledger; At the same time, Intel also studies to create a trusted execution environment for hardware chips of blockchain applications, providing higher security and privacy< At the same time, Wall Street is taking positive actions. Although it was established relatively late, the core function of R3 is to formulate instry standards for the development of banking blockchain technology, explore practical uses, and establish banking blockchain alliance

from what we know, in addition to these two new companies catering to the arrival of digital finance era, large financial institutions are studying blockchain technology and building their own blockchain concept and technical team

at present, there are practical application cases of blockchain technology

in Canada, blockchain start-up blockchain Tech Ltd has been listed on the growth enterprise market of Toronto Stock Exchange; The Estonian government will launch the government's blockchain healthcare record

domestic attention and Research on blockchain technology

blockchain is an optional technology. Prior to that, the people's Bank of China also held a seminar on digital currency. In addition to the central bank, Zhejiang Province, Beijing and other relevant departments also expressed their support for blockchain application research last year

from the perspective of enterprises, Bubi blockchain has been applied to equity, supply chain, points and other fields, and is concting experiments and application tests with exchanges and banks. Bubi blockchain focuses on the innovation of blockchain technology and procts, has a number of core technologies, and has developed its own blockchain service platform. Moreover, many blockchain innovation and entrepreneurship enterprises continue to emerge

in addition, a number of instry alliances are being established. In terms of financial institutions, the cases of blockchain application by large banks and financial institutions in China still need to be solved
by the end of 2015, Bank of America had obtained 15 patents on blockchain. There may be a gap of about a year and a half between China and the United States in blockchain technology
the application of blockchain finance is entering a new stage in an all-round way, various applications will be more and more in-depth, and the relevant changes will be more and more attention, and a great new trend will be formed.

6. The distributed architecture and tamper proof features of blockchain technology help to solve the problems of bill authenticity and information opacity. When participants need to check whether the bill has been tampered or transferred, blockchain can provide indisputable proof of consistency
digital currency also makes use of this feature of blockchain. Puyin is a kind of tea standard digital currency developed based on blockchain technology.

8. In essence, currency issuance and chain reform are different expressions, which means that enterprises or other organizational forms token their own value through blockchain technology, change the existing organizational structure, wealth distribution and value circulation mode, and rebuild a new economic rights and interests system. The incubation area of star exchange is looking for potential traditional enterprises free of charge, To provide them with technical support, the implementation of traditional enterprise chain reform program. Xingke issues digital currency through silubium public chain, which is a public chain that has cultivated different kinds of blockchain applications in many countries, and has strong practical application value.

9. According to the idea of "top-level design, economic incentive, technology application and instry empowerment", the chain reform is more likely to be completed successfully
1. Top level design. Because the chain reform is to transform the business process and the governance structure of social organizations, it has far-reaching influence and great significance. Therefore, it is necessary to have a very high level of top-level design as a guide, rather than step by step, feeling the stones to cross the river. The object, premise and goal of each chain reform project are different, and it is impossible to
2. Economic incentives. Economic chain reform is an emerging trend in the near future, which means to use the certificate as the carrier to adjust the long-term and short-term interests of investors, entrepreneurs and customers across time and space, so that they can form a joint force and strive for a common goal
3. Technical applicability. Chain reform is the inevitable result of the development of blockchain. However, the blockchain follows the system architecture of bitcoin, and it is not designed for the chain reform. Therefore, it is necessary to transform the existing technical structure of the blockchain. By deconstructing the technical structure of the blockchain, and combining with other necessary technologies, we can restructure the technology according to the needs of the chain reform, so as to adapt to the internal logic of different types of chain reform objectives in different instries and instries
4. Instry empowerment. Chain reform must go deep into the instrial process and instrial links, and implement the ultimate goal of empowering the instry. Through a profound analysis of the instrial process and instrial links in the data possession and data flow. The most ideal way of chain reform is not to optimize the business process from the authority of data possession, but to reconstruct the data organization and data storage mode from the perspective of business process optimization. Only when the ultimate goal of the chain reform is locked in the instry, can it proce more value for the whole society
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