Application layer is the core of blockchain industry chain

1. Absrtact: blockchain technology is the underlying technology of bitcoin. Without any centralized organization operation and management, bitcoin has been running very stably for many years (perfectly for seven years), and there has been no problem (no missing account). Therefore, some people have noticed its underlying technology and abstracted bitcoin technology, which is called blockchain technology, Or distributed ledger technology
what is centralization

the so-called centralization means "ownership" or ownership by the company. For example, Tencent's q-coin, which is issued by Tencent, is a kind of centralized electronic currency, including the total amount and the issuing method, is supervised and controlled by Tencent. You can use it, trade and go shopping, but you always have to operate in the framework of Tencent, and the final right of interpretation belongs to Tencent

the issuing mode of bitcoin is preset by the program and encryption algorithm, and runs on multiple nodes all over the world. No one or organization can modify it (everyone has his own account book, so it is impossible for one person to control everyone's account book at the same time. If there is such a technology, why should it be so complicated, If you want to blackmail money into your account, you will be the richest man in the world. There is no one left, And it is not controlled by any single person or organization
take an example: for example, Lao Zhang borrows 100 yuan from Lao Li, but Lao Li is afraid that he will default, so he asks the village head to do notarization and write down the account. This is called centralization. But if you don't find the village head, you can use the loudspeaker to shout in the village: "I Lao Li lent Lao Zhang 100 yuan! Please put it in the account book. "We all put this account in our own account book. This is called decentralization
anyone who transfers money between them will release information through loudspeakers. After receiving the information, everyone will record the transaction in their own account book. With distributed ledgers, it doesn't matter if Lao Zhang or Lao Li's ledgers are lost, because Lao Zhao, Lao Ma, Lao Wang and other families have ledgers

the main advantages of blockchain are that it does not need intermediary participation, the whole process is open and transparent, and the cost is low, and the data security is high

at present, blockchain is in a stage where everyone talks about blockchain, but can't perceive its actual technical charm. Since 2017, it has graally come into our sight, and we have graally realized that bitcoin is more fierce than real estate speculation (the price of mining machinery has skyrocketed! The news is on the screen But I still don't know

so, in which fields can blockchain be applied, what kind of changes will it bring to our future life

the core key: everyone has an account book, everyone has an account book, and the information recorded in each person's account book is consistent and synchronous, and the information is completely transparent. If it is fake, it will be the public enemy of the whole people, which greatly increases the cost of data fraud

core key 2: decentralization, which does not need a central system to manage data, prevents some people from changing data and damages the interests of the majority of people

Application:

1. Account security and privacy protection: currency transfer, exchange, payment system. Blockchain can help prevent data manipulation and fraud, prevent distributed denial of service attacks (DDoS), and effectively protect users' network privacy. Key words: anti counterfeiting, anti-counterfeiting, loan payment

2. Copyright regulation and interest disputes: for example, when a song is downloaded, from the author to the procer and then to the singer, they can get payment in real time through the blockchain, without having to wait for a long time like the traditional way, or even get no reward e to right disputes. Instead of waiting for publishers to provide royalty checks, creators can freely control the process from publishing to payment through blockchain application. Key words: real time receipt, no property dispute

3. Internet of things + artificial intelligence: the intelligent devices in the Internet of things based on the blockchain will be used to monitor the real-time situation of urban infrastructure such as bridges, roads, power grids, etc. the blockchain can connect these intelligent devices together for unified management to help them monitor more efficiently. This will help people better understand how to build a smart city in the future. Key words: unified monitoring, intelligent city

4: proof of existence: in life, once you are asked to prove that you are you, that your mother is your mother, that you have never been married, that the house belongs to you, and so on, things seem very simple. Once it falls on you, it is a great trouble. The application of blockchain technology can perfectly solve the above embarrassment. At that time, all the information that belongs to you will be recorded accurately and can not be tampered with. No one has the right to change it. When the technology develops to a certain stage, birth certificate and marriage certificate may be recorded on the blockchain. Keywords: no keywords

in addition to the application scenarios mentioned above, blockchain technology can also be applied to e-commerce, data storage, logistics and other fields. As long as we grasp the characteristics of blockchain technology, it will become easy to understand.

2. Triporg travel: a travel service application using the underlying technology of blockchain, which can provide travel prepaid services such as train tickets and air tickets.

3.

Blockchain technology is widely used. Under the integration of new technologies, the main application scenarios of blockchain include finance and insurance, intelligent manufacturing, intelligent environmental protection, energy and power, health care, ecation, culture and innovation, smart city, social welfare, agriculture and many other fields

1. blockchain + finance

   blockchain can help financial institutions solve problems such as trust and data sharing

3. blockchain + right art

   Tianhe Guoyun's blockchain right system

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3. Blockchain + government

in statistics, voting, budget management and other aspects, blockchain can rece costs, improve efficiency, and increase transparency, so as to prevent the risk of failure of centralized system

4. Blockchain + insurance

fraud identification and risk prevention: by placing insurance claims under an unchangeable general ledger, blockchain helps to eliminate the common sources of fraud in the insurance instry

property insurance and accidental injury insurance: policies and shared ledgers recorded in the form of smart contracts can improve the efficiency of property insurance and accidental injury insurance

Health Insurance: blockchain technology enables medical records to be encrypted and shared among health service providers, thus improving the interoperability of the health insurance ecosystem

Reinsurance: the information security of reinsurance contracts on the blockchain platform can be ensured through the form of smart contracts, which can rece the amount of information and simplify the payment process between insurers and reinsurers

4. There are six hierarchical structures in the blockchain, which are from bottom to top: data layer, network layer, consensus layer, incentive layer, contract layer and application layer
1. Data layer
the data layer is the lowest layer in the six hierarchies of the blockchain. We can understand the data layer as a database, but for the blockchain, this database is a tamperable and distributed database, which is what we call "distributed ledger"
in the data layer, that is, the "distributed ledger", the data information on the blockchain is stored, and the blockchain structure, asymmetric encryption technology, hash algorithm and other technical means of the block are encapsulated to ensure the security of the data in the case of the whole network being open. The specific method is:
in the blockchain network, nodes use consensus algorithm to maintain the consistency of data layer (that is, the distributed database), and use asymmetric encryption and hash algorithm in cryptography to ensure the non usurpation and traceability of the distributed database
This constitutes the bottom data structure of blockchain technology. However, it is not enough to have a distributed database. We also need to let the data information in the database be shared and exchanged. Next, we will introce the upper layer of the data layer - the network layer
Second, network layer
the network system of blockchain is essentially a P2P (point-to-point) network. Point to point means that there is no need for an intermediate link or centralized server to control the system. All resources and services in the network are distributed in the hands of each node, and the transmission of information is also a direct communication between the two nodes. However, it should be noted that P2P
(peer-to-peer) was not invented by Nakamoto, and the blockchain only integrates this technology
therefore, the network layer of blockchain is actually a particularly powerful point-to-point network system. In this system, each node can not only proce information, but also receive information, just like sending e-mail. You can write your own e-mail, and you can also receive the e-mail sent to you by others
in the blockchain network, nodes need to jointly maintain the blockchain system. Every time a node creates a new block, it needs to notify other nodes in the form of broadcast. After receiving the information, other nodes verify the block, and then create a new block on the basis of the block. In this way, the whole network can jointly maintain and update the general ledger of the blockchain system
however, what rules should the whole network follow to maintain and update the general ledger of the blockchain system? This involves the so-called "laws and regulations" (rules), which we will introce next: the consensus layer
Third, consensus layer
in the world of blockchain, consensus simply means that the whole network should maintain and update the general ledger of blockchain system according to a unified and agreed rule, which is similar to the rule of updating data. It is one of the core technologies of blockchain and the governance mechanism of blockchain community to let highly dispersed nodes reach consensus efficiently in the decentralized blockchain network
at present, the mainstream consensus mechanism algorithms include: proof of work of bitcoin (POW), proof of rights and interests of Ethereum (POS), proof of rights and interests of EOS (dpos), etc
we now introce the data layer, network layer and consensus layer. These three layers ensure that there are data, networks and rules for updating data on the network. However, there is no free lunch in the world. How can nodes actively participate in the maintenance of the blockchain system? Here is the incentive layer, which we will introce next: incentive layer< 4. Incentive layer
incentive layer is the so-called mining mechanism, which can be understood as incentive mechanism: you can get as much reward as you contribute to the blockchain system. With this incentive mechanism, the whole network nodes can be encouraged to participate in the data recording and maintenance on the blockchain
mining mechanism and consensus mechanism are actually the same truth. Consensus mechanism can be understood as the company's general rules and regulations, while mining mechanism can be understood as the reward rules for what you do well in the general rules and regulations
just like the consensus mechanism POW of bitcoin, it stipulates that more work pays more. Whoever can find the correct hash value first can get a certain amount of bitcoin reward
and Ethereum's POS stipulates that the older the holder is, the more likely he or she will be rewarded
it should be noted that the incentive layer is generally only available for the public chain, because the public chain must rely on the nodes of the whole network to jointly maintain data, so there must be a set of incentive mechanism to encourage the nodes of the whole network to participate in the construction and maintenance of the blockchain system, so as to ensure the security and reliability of the blockchain system
the blockchain is safe and reliable, and it is not intelligent enough, right? The contract layer we will introce next can make the blockchain system more intelligent
v. contract layer
Contract layer mainly includes various scripts, codes, algorithm mechanisms and smart contracts, which is the basis of block chain programming. What we call "smart contract" is at the contract level
if the bitcoin system is not intelligent enough, the "smart contract" proposed by Ethereum can meet many application scenarios. The principle of the contract layer is to embed the code into the blockchain system, in this way to realize the smart contract that can be customized. In this way, on the blockchain system, once the terms of the smart contract are triggered, the system can automatically execute commands< Finally, the application layer. The application layer is very simple. As the name suggests, it is a variety of application scenarios and cases of blockchain. What we now call "blockchain +" is the so-called application layer. At present, the blockchain applications that have been implemented are mainly various blockchain applications built on
eth, EOS and other public chains. There are more applications of gambling and games, and the real practical applications have not yet appeared.

5. The projects of jinwowo network technology analysis blockchain are divided into three levels:

the top and easiest thing to do is the application layer. I can see two or three such projects every day, accounting for more than 95% of the whole market. But such companies often write a lot of technical things in the white paper. In fact, they also write in vain. This is purely for the purpose of collecting pages, because they don't need to talk about technology at all

the second type is the intermediate operation level, such as quantum chain and ant. This kind of project is similar to the operation procere, called the basic chain, which is used to run the application. This category is relatively small, and the proportion has dropped to less than 5%

the third category is more downward extension and lower level, such as standard chain and arcblock. This kind is even less. It's good to see two or three in a month. And some of them are not necessarily true, because there is really nothing to write about, and all fields are occupied by others, so someone will go in this direction.

6.

Because the blockchain technology is not mature at this stage, and the infrastructure is not perfect, many applications are limited, and the overall application is still in a very early stage

First of all, the main function of blockchain is to store information. Any information that needs to be saved can be written to or read from the blockchain, so it is a database. Secondly, anyone can set up a server and join the blockchain network to become a node. In the world of blockchain, there is no central node (decentralization). Every node is equal and keeps the whole database. You can write / read data to any node, because all nodes will be synchronized in the end to ensure the consistency of the blockchain

7.

Blockchain Yearbook: since the second half of 2016, more than 10 blockchain instrial parks have been established or will be established in China. In addition to Shanghai, Hangzhou and Guangzhou, which have been maintaining a strong momentum in the field of Finance and science and technology, other provinces and cities such as Wuhan, Chongqing, Qing and Suzhou have also laid out blockchain instrial parks Blockchain Yearbook not only summarizes the latest detailed information of global blockchain instrial parks, but also includes the support policies of local governments for blockchain

according to the blockchain Yearbook, as of the end of November 2018, the number of blockchain companies with blockchain as the main business in China has reached nearly 1000, and the instry has initially taken shape. At present, many local governments are also actively positioning blockchain technology from the instrial height, and the policy system and regulatory framework are graally developed and improved

I. blockchain Instrial Park

1. Shanghai Collaborative Innovation Center was established in the earliest but the lowest profile

in November 2016, Zhongguancun blockchain instry alliance and Shanghai Intellectual Instrial Park reached cooperation to jointly create Zhongguancun blockchain Instry Alliance Shanghai collaborative innovation center. At the same time, Shanghai intelligence instry sky blockchain incubation base and Shanghai equity trading trusteeship center were officially established, which means that China's first application blockchain incubation base is officially located in Baoshan, Shanghai

according to the regulations of the park, all kinds of enterprises registered in the park will be given a certain proportion of supporting policies according to the contribution of the enterprises

on the day of the establishment of Shanghai Collaborative Innovation Center, Shanghai Ruizi Investment Management Co., Ltd., Shanghai kuaibei Network Technology Co., Ltd. and Shanghai miaojao Network Technology Co., Ltd. entered. Nearly two years since its establishment, the low-key park has not been exposed much

2. Hangzhou has three blockchain entrepreneurial Parks: occupying the right time, favorable location and favorable people

in the 2018 government work report, the Hangzhou government explicitly listed the blockchain instry as one of the seven future instries to be cultivated in Hangzhou. At present, Hangzhou has formed three major blockchain instrial parks represented by xixigu blockchain Instrial Park, China (Xiaoshan) blockchain entrepreneurship and innovation base, and China Hangzhou blockchain Instrial Park

xixigou blockchain Instrial Park was established in April 2017, located in xixigou Internet Finance Town, Qianjiang Xixi Hejing, and invested and operated by Hangzhou urban investment asset management group

China (Xiaoshan) blockchain entrepreneurship and innovation base was established by the cooperation of China Institute of electronic technology standardization, Hangzhou Xiaoshan District People's government and China Wanxiang Holding Co., Ltd., and settled in Xiaoshan in May 2017

China Hangzhou blockchain Instrial Park, located in Yuhang District, was established in April 2018, and Li Xiaolai, the big man of the currency circle, also attended the ceremony. At the launching ceremony, Yao Yongjie, chairman of Hangzhou longlan investment, announced the establishment of xiong'an global blockchain innovation fund with a total scale of RMB 10 billion

3. Wuhan blockchain Instrial Park encourages college students to start blockchain businesses

Beijing

on November 9, 2018, Zhongguancun Management Committee, Beijing Municipal Bureau of financial work and Beijing Municipal Commission of science and technology jointly issued the "Beijing financial technology development plan (2018-2022)"

the plan brings blockchain technology into the scope of Beijing's "financial technology" development plan, actively promotes the development of underlying technologies that affect the application of financial technology functions, and improves all kinds of technology market facilities, including artificial intelligence, big data, Internet technology (mobile Internet, Internet of things), distributed technology (cloud computing, blockchain), security technology (quantum computing Biometrics, encryption technology, etc

on September 29, 2017, the Beijing Municipal Bureau of financial work and other eight departments jointly issued the implementation measures for the construction of the capital's green financial system, which mentioned the development of green financial information infrastructure based on blockchain and the improvement of the security level of green financial projects

on April 6, 2017, the Management Committee of Zhongguancun Science and Technology Park printed and issued the "ZhongGuanCun national independent innovation demonstration zone to promote the deep integration of science, technology and finance, innovation and development support fund management measures", which mentioned that financial technology enterprises should be supported to provide services for financial regulators and financial institutions, and carry out the demonstration and application of artificial intelligence, blockchain, quantitative investment, intelligent finance and other cutting-edge technologies, Improve the efficiency and convenience of financial services

enterprises shall be given financial support according to 30% of the amount of technology application contract or purchase agreement signed between financial technology enterprises and financial regulators or financial institutions, and the maximum amount of support for a single project shall not exceed 5 million yuan

on December 30, 2016, the Beijing Municipal Bureau of financial work issued the "13th five year plan for the development of financial instry in Beijing", which mentioned that blockchain should be classified as a technology of Internet Finance and encouraged the development of this technology

on August 10, 2016, Beijing Municipal Bureau of financial work issued the performance tasks of Beijing Municipal Bureau of financial work in 2016, in which Article 8 mentioned promoting the introction of Zhongguancun Internet finance comprehensive pilot scheme and the establishment of Zhongguancun blockchain alliance

Shanghai

on April 28, 2017, the Shanghai Internet Finance Instry Association issued the self discipline rules for blockchain technology application of Internet Finance practitioners, which requires blockchain technology to serve the real economy, pay attention to the balance between innovation and standardization, and security, and clarify the bottom line of financial stability and information security, Internet financial institutions applying blockchain technology should report to local regulatory authorities and instry self regulatory organizations, and actively accept instry supervision and self regulatory management. The reporting information should at least include project name, responsible person, business model, business risk, risk control measures, etc

on March 7, 2017, the development and Reform Commission of Baoshan District of Shanghai printed and issued the key points of financial services in Baoshan District in 2017. It was mentioned that the construction of Miaohang blockchain incubation base and Songnan Shanghai Internet finance evaluation center should be followed up to promote the development of financial technology companies as an important part of Baoshan financial ecosystem relying on professional teams and market forces, We should form a development model in which venture capital funds and angel investors gather actively, science and technology finance support is strong, and enterprise investment motivation is fully stimulated

On December 8, 2017, the office of the people's Government of Huangpu District and the office of the Management Committee of Guangzhou Development Zone issued the measures for promoting the development of blockchain instry in Guangzhou Development Zone, Huangpu District, Guangzhou, aiming at the instrial and commercial registration place, tax collection and management relationship and statistical relationship within Huangpu District, Guangzhou Development Zone and its entrusted management and subordinate parks, Blockchain enterprises or institutions with sound financial system, independent legal personality, and commitment not to move away from their registered and office address within 10 years, not to change their tax obligations in the area, and not to rece their registered capital shall implement incentive measures such as cultivation award, growth award, platform award, Application Award, Technology Award, financial support, activity subsidy, etc. This is the biggest policy measure in China at present

on September 25, 2017, the Shenzhen Municipal People's Government printed and issued several measures to support the development of the financial instry in Shenzhen. It was mentioned that the financial technology special award focuses on excellent projects in the fields of blockchain, digital currency, financial big data application, and the annual award amount is controlled within 6 million yuan

on August 17, 2017, Shenzhen Economic and trade and Information Commission issued the notice of Shenzhen Economic and Trade Information Commission on organizing and implementing the 2018 special support plan for information security of new generation information technology in Shenzhen strategic emerging instries, which mentioned that it is necessary to support blockchain technology

on November 3, 2016, the Financial Development Service Office of Shenzhen Municipal People's government issued the 13th five year plan for the development of Shenzhen's financial instry, which mentioned supporting financial institutions to strengthen the research and exploration of emerging technologies such as blockchain and digital currency

Chongqing

on March 7, 2018, Chongqing municipal government issued the notice on implementing and promoting the task division of the guidance on supply chain innovation and application, which mentioned that it is necessary to study the use of blockchain, artificial intelligence and other emerging technologies to establish a credit evaluation mechanism based on supply chain

on November 7, 2017, Chongqing Economic and Information Technology Commission issued the opinions on accelerating the cultivation and innovative application of blockchain instry. It is mentioned that by 2020, we will strive to build 2-5 blockchain instry bases in Chongqing, introce and cultivate more than 10 leading enterprises in the domestic subdivision field of blockchain, and more than 50 blockchain enterprises with core technology or growth type, The introction and cultivation of more than 500 middle and senior talents in blockchain will build Chongqing into an important instrial highland and innovative application base of blockchain in China

8.

According to the 2018 white paper on China's blockchain Instry issued by the information center of the Ministry of instry and information technology of China on the 20th, China's blockchain instry is in a stage of rapid development, and the instrial chain has been initially formed

according to the distribution of blockchain instry segments, as of the end of March 2018, the number of instry application service companies in the blockchain instry was the largest, including 86 companies mainly providing application services for the financial instry and 109 companies mainly providing application services for the real instry. In addition, there are more than 40 related companies in blockchain solutions, underlying platforms, blockchain media and communities

content source: phoenix.com

9. Generally speaking, blockchain system consists of data layer, network layer, consensus layer, incentive layer, contract layer and application layer
among them, the data layer encapsulates the underlying data block and related data encryption and timestamp technologies; The network layer includes distributed networking mechanism, data transmission mechanism and data verification mechanism; The consensus layer mainly encapsulates all kinds of consensus algorithms of network nodes; The incentive layer integrates economic factors into the blockchain technology system, mainly including the issuance mechanism and distribution mechanism of economic incentives; The contract layer mainly encapsulates all kinds of scripts, algorithms and smart contracts, which is the basis of the programmable characteristics of blockchain; The application layer encapsulates various application scenarios and cases of blockchain. In this model, chain block structure based on timestamp, consensus mechanism of distributed nodes, economic incentive based on consensus computing power and flexible and programmable smart contract are the most representative innovations of blockchain technology.

10. Triporg travel: a blockchain + travel service application, which can provide people with travel services such as booking air tickets and train tickets.