Blockchain car

1.

The strict definition of blockchain refers to the distributed database technology that multiple nodes in peer-to-peer network jointly maintain a continuously growing list ledger constructed by time stamp and orderly record data blocks through consensus mechanism based on cryptography technology. This technical solution allows any number of nodes in the participating system to calculate and record all the information exchange data in the system in a period of time to a data block through cryptography algorithm, and generate the fingerprint of the data block for linking the next data block and checking. All participating nodes in the system jointly determine whether the record is true

blockchain is a technical solution similar to NoSQL (non relational database). It is not a specific technology, and can be implemented through many programming languages and architectures. There are many ways to realize blockchain, including pow (proof of work), POS (proof of stake), dpos (delegate proof of stake), etc

the concept of blockchain was first proposed in the paper "bitcoin: a peer-to-peer electronic cash system" by indivials (or groups) who call themselves Satoshi Nakamoto. Therefore, bitcoin can be regarded as the first application of blockchain in the field of financial payment

< H2 > [popular explanation]

no matter how big the system or how small the website is, there is a database behind it. So who will maintain this database? In general, who is responsible for the operation of the network or system, then who is responsible for the maintenance. If it is wechat database, it must be maintained by Tencent team, and Taobao database is maintained by Alibaba team. We must think that this way is natural, but blockchain technology is not

if we think of the database as a book, for example, Alipay is a typical account book. Any change of data is bookkeeping. We can think of database maintenance as a very simple way of accounting. In the world of blockchain, everyone in the blockchain system has the opportunity to participate in bookkeeping. The system will select the fastest and best bookkeeper in a period of time, maybe within ten seconds or ten minutes. The bookkeeper will record the changes of the database and the account book in a block. We can think of this block as a page. After the system confirms that the records are correct, the system will record the changes of the database and the account book in a block, It will link the fingerprint of the past account book to this paper, and then send this paper to everyone else in the whole system. Then, over and over again, the system will look for the next person with fast and good bookkeeping, and everyone else in the system will get a of the whole ledger. This means that everyone as like as two peas in the system is called Blockchain. It is also called distributed account technology. P>

as like as two peas (computer) have identical accounting books, and everyone has the same rights, they will not collapse e to the loss of contact or downtime of a single person. As like as two peas, the data is transparent and everyone can see what changes are in every account. Its very interesting feature is that the data can't be tampered with. Because the system will automatically compare, it will think that the same number of books with the largest number are real books, and a small number of books with different numbers are false books. In this case, it's meaningless for anyone to tamper with his own account book, because unless you can tamper with most nodes in the whole system. If there are only five or ten nodes in the whole system, it may be easy to do so. However, if there are tens of thousands or even hundreds of thousands of nodes and they are distributed in any corner of the Internet, unless someone can control most computers in the world, it is unlikely to tamper with such a large block chain

< H2 > [elements]

combined with the definition of blockchain, we think that we must have the following four elements to be called public blockchain technology. If we only have the first three elements, we will consider it as private blockchain Technology (private chain)

1, peer-to-peer network (power equivalence, physical point-to-point connection)

2, verifiable data structure (verifiable PKC system, non tampering database)

3, distributed consensus mechanism (Solving Byzantine general problem, solving double payment)

4 Game design of Nash equilibrium (cooperation is the strategy of evolutionary stability)

< H2 > [Characteristics]

combined with the definition of blockchain, blockchain will realize four main characteristics: decentralized, trustless, collective maintenance and reliable database. And the other two will be derived from the four characteristics  Features: open source  Privacy. If a system does not have these characteristics, it can not be regarded as an application based on blockchain technology

Decentralized: there is no centralized hardware or management organization in the whole network. The rights and obligations of any node are equal, and the damage or loss of any node will not affect the operation of the whole system. Therefore, it can also be considered that the blockchain system has excellent robustness

trustworthiness: there is no need to trust each other when participating in the data exchange between each node in the whole system. The operation rules of the whole system are open and transparent, and all data contents are also open. Therefore, within the specified rule range and time range of the system, nodes cannot and cannot cheat other nodes

collective maintenance: the data blocks in the system are maintained by all the nodes with maintenance function in the whole system, and these nodes with maintenance function can be participated by anyone

reliable database: the whole system will enable each participating node to obtain a of the complete database in the form of sub databases. Unless more than 51% of the nodes in the whole system can be controlled at the same time, the modification of the database on a single node is invalid, and the data content on other nodes cannot be affected. Therefore, the more nodes and computing power in the system, the higher the data security in the system

Open Source: since the operation rules of the whole system must be open and transparent, the whole system must be open source for the program

Privacy Protection: since there is no need to trust each other between nodes, there is no need to disclose the identity between nodes, and the privacy of each participating node in the system is protected

2. In 2017, he began to work in the blockchain instry for three years, which witnessed the instry from obscurity to sudden outbreak and then to calm. Let's make a conclusion first. If you are willing to spend money, I suggest you go to professional IT consulting and delivery companies like ThoughtWorks / starwalker. In my understanding, the market is roughly divided into

1. The underlying chain platform providers, such as ant / network, usually only provide chain and development tools, but the specific instry / scenario solutions and development delivery capabilities are limited, which is not their focus. They want to use blockchain to package and sell more cloud services

2. Blockchain solution companies usually provide blockchain solutions in their own familiar fields, but most of them are small and medium-sized teams or start-up teams. Most of them have little difference in blockchain technology capabilities and have a deep understanding in their respective fields

however, the biggest problem of such companies is that because the blockchain instry is still in its early stage, and there is no mature business model or profit model, most of them need external investment to continue their life, which leads to the difficulty in guaranteeing their service ability or continuous performance ability, and frankly speaking, their business is unstable

on the other hand, because it is not a professional end-to-end delivery or professional outsourcing, it does not have mature methods, team and project management to ensure the efficient and complete delivery of a blockchain solution. So for buyers, it is easy to get out of control in the process of project development, or it is difficult to get satisfactory delivery results in the end

there is also a common problem, that is, most customers do not know what to do with blockchain and how to combine their business to do a valuable and meaningful blockchain project. Under this kind of cognition, I blindly find a company to directly develop on the scheme, and it's easy to regret or even give up halfway after doing it. I see too many such projects, I can't figure out the situation, and I don't know what I want to do. It's easy to set up a blockchain. This kind of company usually does not have the ability of pre-sale business consulting, business analysis and planning, in other words, the ability to help you understand the situation. In a word, if you know what you want, it may be OK to find them. If you don't know, it's better to find a professional consulting company honestly

3. IT consulting and delivery companies, which are usually specialized in serving large customers in various instries, have a set of consulting and end-to-end delivery methods and team support. Well, there are not many blockchain businesses in these companies, because they are not limited to the narrow business of blockchain, such as Accenture or some domestic companies. However, ThoughtWorks is slightly different. It has a blockchain division, pre-sales consulting / business analysis services, and delivery services. Then it has blockchain projects in its own major customers in various instries. Automobile, finance, retail, energy, agriculture and so on

3.

On January 14, 2020, Beijing time, Guangdong Zhongke intelligent blockchain Technology Co., Ltd. successfully held the global open source of the underlying technology of IOT blockchain and the launch conference of the ecosystem service system in Huangpu, Guangzhou. It released the underlying technology platform of IOT blockchain iovblockchain to the whole world, relying on mdpos algorithm and cross chain technology, It has officially become the representative platform of the fourth generation blockchain algorithm technology, and ranked among the top ten blockchain underlying technology platforms in the world. After China Science and Technology Corporation settled in Huangpu, in just two months, the number of patent applications for blockchain technology has reached 11.2% of the number applied by the people's Bank of China, and 1.3% of Alibaba, the world's largest patent application company for blockchain technology. It has become the backbone of Guangzhou Huangpu blockchain instry's successful incubation and participation in global blockchain technology competition. At the press conference, China Science and Technology Corporation, Guangzhou intelligent network automobile demonstration area operation center and Zhenbao Bus Group signed a tripartite agreement on blockchain technology application cooperation, which became another important scene of blockchain technology application in Huangpu District

the technological infrastructure route in the development of blockchain instry is particularly important, including the core content of underlying algorithm ability, open source service ability, ecosystem development ability, instry standardization process and digital chip instry application. After long-term scientific research incubation, China Science and Technology Corporation has completed the open source of the underlying blockchain algorithm and started the ecological service system, and will start the standardization construction of the blockchain of the Internet of vehicles and the design and development of digital chips in 2020. The launch of iovblockchain's open source and ecological services indicates that the underlying technology strength of China's blockchain is changing the global competition pattern of a new generation of information technology. In terms of underlying technology and business ecology, as one of the core technology representatives of blockchain, it leads China's blockchain instry and becomes a Chinese force participating in global competition

the press conference was guided by the instry and Information Bureau of Huangpu District of Guangzhou City and supported by the block chain instry association of Guangzhou City, the block chain alliance of Guangdong, Hong Kong and Macao Dawan District, blockchain 728, Guangdong automotive supplies chamber of Commerce and Internet of vehicles branch. More than 100 representatives from instry organizations and core blockchain enterprises attended the press conference and participated in the technology docking activities

this article comes from the author of auto home, which does not represent the standpoint of auto home

4. (1) Building security consensus 2) Create a trusted environment 3) Put an end to the invasion of computing power 4) Preventing value spillover 5) Protect the rights and interests of miners.

5. Can not be trusted to play their own know that the threshold of easy currency transactions as long as 100 yuan, take a 100 yuan to try water

6. Generally, the grandstand is far away from the stage, but the infield is not always clear. I suggest you buy 480 tickets that are right opposite the stage. I bought 880 tickets when I went to Shanghai grand stage to watch the performance. After entering the stage, I found that 380580 tickets were similar to the effect I saw. After watching, I met a girl who went to see the performance. She bought the most expensive ticket in the fourth row of the infield, She said she glared at Zheng Ronghe on the stage, but still couldn't see clearly. Don't be too tangled, just go and see happily

7. Now the auto repair instry is getting better and better, the car has been a common means of transportation, the later development will be very good

8.

I've got the invitation code, and I'm waiting for the project to go online in April