Blockchain public refining
In the past, when it comes to blockchain, we always think of foreign procts, such as Ethereum. But when I talk about this topic today, I think more about China's own blockchain technology
at present, the mature application of blockchain technology is more concentrated in some public chain projects, because many application projects need to be developed based on this, so I think the current global landing direction is public chain projects, and it is still too early to talk about maturity. After all, bitcoin and Ethereum are still blocked, and many old problems have not been solved, There will be many new problems. The well-known ones are Biyuan chain, ulord (the project is abroad, but the technical party provides it in the domestic company, Hunan Tianhe Guoyun Co., Ltd.), quantum chain, Xiaoyi Neo, gongxinbao, etc
ulord is a point-to-point value delivery public chain. By building the underlying architecture of blockchain and digital resource distribution protocol, it supports third-party developers to build their own applications on top of their open source protocol, and works with many instry partners to build a complete ecosystem of blockchain technology and applications
based on various rules and protocols created by ulord, it is convenient to graft various digital resource application scenarios including text, pictures, music, video, software, etc., providing a direct docking platform for information creators and consumers. Third party developers can build their own economic system in ulord, or focus on building all kinds of applications around ulord, and use the ulordtoken in ulord as the voucher in the system
for example, an experience sharing platform can be built on ulord, where the experience sharers price the published experience, and the people who obtain the experience information trade on the platform, and each fee paid to the experience sharers will arrive at the account immediately; Proct promoters can publish ads on ulord, price ads, and people who are interested in ads can get certain profits by clicking on ads. The first mock exam is to separate information from the past, and to use platform or other centralized organizations to spread profit. This mode eliminates intermediate links, and information providers and consumers directly connect with Ulord, which ensures the maximization of the interests of the originator. p>
Blockchain includes public blockchain, joint (instry) blockchain and private blockchain. Public chain point-to-point e-cash system: bitcoin, smart contract and decentralized application platform: Ethereum
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. In essence, it is 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 bitcoin network transaction information, Used to verify the validity of its information (anti-counterfeiting) and generate the next block
extended data
according to the different degree of blockchain network centralization, three kinds of blockchains under different application scenarios are differentiated:
1. The blockchain with the whole network open and without user authorization mechanism is called public chain
2. The authorized nodes are allowed to join the network, and the information can be viewed according to the authority. It is often used in the inter agency blockchain, which is called alliance chain or instry chain
3. All the nodes in the network are in the hands of one organization, which is called private chain
alliance chain and private chain are also called licensing chain, and public chain is called non licensing chain
blockchain features
1, decentralization. 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
2. Openness. Blockchain technology is based on open source. In addition to the private information of all parties involved in the transaction is encrypted, the data of blockchain is open to everyone. Anyone can query blockchain data and develop related applications through the open interface, so the information of the whole system is highly transparent
3. 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
4. Safety. As long as 51% of all data nodes cannot be controlled, the network data cannot be arbitrarily manipulated 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 the information can be transferred anonymously
Public chain, also known as "public chain", refers to the blockchain that anyone in the world can enter the system at any time to read data, send confirmatory transactions and compete for bookkeeping. The public chain is generally considered to be "completely decentralized", because no indivial or institution can control or tamper with the reading and writing of data in it. In terms of application, blockchain public chain mainly includes bitcoin, Ethereum, super ledger, most counterfeit currencies and smart contracts. The ancestor of blockchain public chain is bitcoin blockchain, which has the following characteristics:
1, open source code
upload the code to GitHub, and everyone can get complete blockchain data by downloading, Accept the test of the public
2, complete decentralization
anyone can become a node, each node is open, everyone can participate in the calculation of the blockchain, any node is not permanent, but phased, and any center is not mandatory for nodes. Anyone can read and send transactions, and transactions can be effectively confirmed on the blockchain. Anyone can participate in the consensus process. The consensus process determines whether a block can be added to the blockchain and the exact current state. Everyone can get financial reward from it, which is proportional to their contribution to the consensus process. These public chains are generally considered to be "completely decentralized"
3. Developing decentralized applications
through this public chain, developers can easily develop centralized applications. Public chain can protect the rights and interests of users from the influence of program developers
This is two different concepts. According to different standards, blockchain can be classified into three categories:
& # 8195&# 8195; 1) According to the network scope of blockchain, it can be divided into public chain, private chain and alliance chain
&# 8195; 2) According to the docking type of blockchain, it is divided into single chain, side chain and interconnection chain
&# 8195; 3) According to the display environment of blockchain deployment, it can be divided into main chain and test chain
the main chain can be understood as a formal online and independent blockchain network, while the public chain refers to a blockchain that can be read by anyone, can send transactions and can be effectively confirmed by anyone, and can participate in its consensus process
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
What's the most expensive in the 21st century? It could be blockchain talent
Zhang Yan (pseudonym), who graated from a 211 university in Shanghai with a master's degree, began his internship in a blockchain company this summer, mainly responsible for the collection of instry information. During the internship, his salary is 8000 yuan, and after becoming a regular, his monthly salary will reach 22000 yuan
Zhang Yan's starting salary is much higher than that of fresh graates' first employment. According to the statistics of Shanghai human resources and Social Security Bureau, the average monthly salary of college graates with bachelor's degree is 4793 yuan, and that of graates with master's degree or above is 8001 yuan
according to the analysis of instry insiders, at present, there is a high shortage of talents in the instry, few talents meet the recruitment requirements, and the imbalance between supply and demand leads to a high premium of talents. It is expected that in two to three years, when the blockchain technology is applied and fully blossomed, the relationship between supply and demand in the market will enter a stable stage
how expensive are blockchain talents
"our recruitment has not been smooth. We may have 5-8 people in a quarter, which can only reach 20% of our expectation." Deng Xu, the founder of Yunxiang blockchain, has been hoping to rapidly expand the team to a team of 100 technicians, but he is struggling to find suitable talents
recruitment information of a company
"my ideal blockchain talents mainly have two standards, one is computer foundation, the other is algorithm foundation." Deng Xu said
according to Yan Li, founder of computing power think tank, there are three types of blockchain talents:
first, in terms of content research, most of these talents were originally engaged in financial information, traditional research and other jobs, and after one to two months of training, they can start their jobs
the second is proct technology development, which requires mature computer technology talents, such as research on underlying data development, data storage and so on. They need to redistribute their work areas in the blockchain scenario, and they can adapt to the post demand after two to three months
the third is the refiner of proct requirements, which is the most difficult person to find. They need to understand the business logic of blockchain, dig out pain points, and understand technology, so as to connect the customer's needs with the ability of technical developers
Shang Yang, an analyst of yiou think tank, also pointed out to Zhongxin Jingwei that the essence of blockchain is a distributed encrypted database, and the core idea is decentralization. Blockchain is evolved from bitcoin. Before, there were almost no relevant courses in Colleges and universities, so today's practitioners of blockchain technology are mostly self-taught. Objectively, all those with computer professional background have the conditions to learn. But technology is not the key, the key is to find the appropriate application scenarios. Only in a certain scenario, the data distributed storage can be irreplaceable and bring significant benefits to the enterprise, can it be regarded as a good application scenario, so the application on the chain is still in the exploration stage
"there are too few application-oriented talents," Shang Yang said. The application and transformation of any new technology needs a process. At present, many technicians do not understand procts
According to Deng Xu, there are three main reasons for the shortage of talents in blockchain: on the one hand, the popularity of blockchain is fast, while the number of technicians is small, resulting in the imbalance between supply and demand; On the other hand, blockchain is actually a comprehensive technology, including computer language, algorithm, communication, cryptography and so on. At present, talents trained by colleges and universities generally have only one or two aspects of knowledge reserve. In addition, with the popularity of ICO last year, a large number of new blockchain companies were born, further aggravating the imbalance between supply and demand of blockchainwith the fire of blockchain concept, some colleges and universities began to offer courses, and training institutions also entered the market one after another. Yan Li suggests that top universities with science and engineering majors can continue to give full play to their advantages and cultivate talents for blockchain technology application; In terms of business, it still mainly relies on talents from traditional instries; Social organizations, research centers and other institutions can organize vocational training for talents in the blockchain instry, but good vocational training must last two to three months instead of two or three days of "quick" training
However, Deng Xu pointed out that at this stage, training can only supplement some middle and low-end technical talents for the instry, but it can not solve the problem of high-end talents. Shang Yang also pointed out that universities with relevant courses are also facing the problem of retaining teachers“ On the one hand, it's easy to be poached by enterprises. On the other hand, most people who really understand technology and application choose to open their own companies or speculate in money. ""blockchain technology is the closest technology to money, so many people can't concentrate on technology, and the technology is very complex and boring." Deng Xu said
content source observer network
the difference between blockchain and ordinary mall is that it adds the function of virtual currency. You can see the interface and docking method of virtual currency at other times to avoid mistakes
(1) running on the Internet
(2) completely distributed< (3) the number of data nodes is changeable and unpredictable< (4) the data is public< (5) anyone can participate anonymously
(6) the operation and maintenance cost is high and depends on the reward mechanism< (7) the transaction speed is slow.