What are the challenges of blockchain technology

1. The following points are the characteristics of the blockchain summarized by jinwowo group:

1 - Decentralization: because the blockchain relies on each node to achieve system maintenance and ensure the authenticity of information transmission, it is based on distributed data storage without centralized management by a certain center, Therefore, the attack and tampering of a node will not affect the healthy operation of the whole network

2-DE Trust: the establishment of a connection between any two nodes does not need to trust each other's identity, and the data exchange between the two sides does not need the basis of mutual trust. Since all nodes in the network can act as "supervisors", there is no need to worry about fraud

3 - extensible: blockchain is an underlying open source technology, on which various kinds of extension, decentralized and distrusted applications can be realized<

4 - anonymization: the two sides of data exchange can be anonymous, and the nodes in the network can exchange data without knowing each other's identity and personal information

5 - Security and reliability: because the activities between any nodes are supervised by the whole network, and the database adopts distributed storage, for hackers, first, they can't disguise and cheat, Second, we can't control the network only by conquering a node.

2. Application of blockchain technology? I can answer this question
there are many applications of blockchain technology, such as blockchain traceability, blockchain electronic invoice, blockchain judicial deposit, blockchain loan and so on. Now the blockchain technology is developing rapidly, which is far beyond our imagination. Detailed applications can be understood in cryptography finance.

3. Blockchain is the core supporting technology of digital cryptocurrency system represented by bitcoin. The core advantage of blockchain technology is decentralization. It can realize point-to-point transaction, coordination and cooperation based on decentralized credit in a distributed system without mutual trust by means of data encryption, time stamp, distributed consensus and economic incentive, so as to solve the common high cost, low cost and low cost of centralized institutions Low efficiency and data storage insecurity provide solutions
the application fields of blockchain include digital currency, token, finance, anti-counterfeiting traceability, privacy protection, supply chain, entertainment, etc. with the popularity of blockchain and bitcoin, many related top domain names have been registered, which has a great impact on the domain name instry.

4. The development and application of blockchain technology are not very mature technologies, and many people are still skeptical and wait-and-see. However, those who are optimistic about the development prospect of blockchain technology think that blockchain is a subversive technology, but no matter what, there will be actions if there are ideas. Let's see the progress and application of blockchain technology in various countries
at present, China's blockchain instry mainly focuses on computing infrastructure, radiates digital currency, and derives to the penetration process of blockchain application. Infrastructure includes chip miner, mine pool and cloud computing power. Digital currency, wallet and exchange constitute the monetary system. Asset authentication, financial services and charity form a rich application ecology. From the development trend, the mining machine has experienced CPU, GPU, FPGA, until now through ASIC chips to customize mining, we can see from the mining machine calculation force curve that the mining machine calculation force has been in a soaring trend.

5. At present, the current situation of blockchain technology development in China is that there are more patents, less paper code, no independent security controllable underlying platform, and no integrated platform of software and hardware, which will directly lead to the technical risk of blockchain core technology being controlled by others, the financial risk of foreign open source platforms seizing the financial market, and the economic risk of foreign open source platforms penetrating China's real and virtual economy. Therefore, it is very important to realize the landing of blockchain application as soon as possible. Now there are landing applications all over the country under the support of policies. Changsha high tech Zone has officially launched a blockchain project, which is called SMIC blockchain service platform. It is a government enterprise service platform, cooperating with Bank of Changsha and Dean justice, and now it is the stage of collecting enterprises to join the chain.

6. The mines in Outland should be the most valuable, but it's hard to mine, and the mines in pandaliya are also good
under the ideal situation of big bird mount + no one grabs the mines with you + opposing camp doesn't kill you + familiar with the mines, more than 1000g per hour
under normal circumstances, e to various interference factors, 500g per hour is good, minus 200g per hour, the actual income is 300g per hour, If you are engaged in manual mining, you should also consider the fatigue factor. The more mining, the lower the efficiency. It is not recommended to use this lowest level method of earning money. Just like the wage earners in big cities, they can barely earn a living (point card money), but they have no future

7.

Blockchain:

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 rights and interests between different nodes in the blockchain system.

blockchain has the characteristics of decentralization, distrust, scalability, anonymity, security and reliability:

the concept of blockchain was first put forward in the paper of Nakamoto Tsung in 2008. Blockchain can be understood as a public accounting mechanism (technical solution), which is not a specific proct. Its basic idea is: through the establishment of a group of public accounts on the Internet, all users in the network jointly keep accounts and check accounts on the account book, to ensure the authenticity and non tampering of information. And the reason why it's called & 8218; Block No. 8219; Chain, as the name suggests, is because the structure of data stored in the blockchain is composed of one by one on the network; Storage block; Each block contains all the information exchange data in the network within a certain period of time. Over time, the chain will grow

characteristics of blockchain

blockchain has the characteristics of decentralization, distrust, scalability, anonymity, security and reliability:

Decentralization: because the blockchain relies on each node to achieve the maintenance of the system and ensure the authenticity of information transmission, it is based on distributed storage data without centralized management by a certain center, Therefore, the attack and tampering of a node will not affect the healthy operation of the whole network

de trusting: the establishment of a connection between any two nodes does not need to trust each other's identity, and the data exchange between the two sides does not need the basis of mutual trust. Because all nodes in the network can play the role of ﹥ 8218; The supervisor; So don't worry about fraud

Extensibility: blockchain is a kind of underlying open source technology, on which various kinds of expansion, decentralized and distrusted applications can be realized

anonymization: both sides of data exchange can be anonymous, and nodes in the network can exchange data without knowing each other's identity and personal information

safe and reliable: because the activities between any nodes are supervised by the whole network, and the database uses distributed storage, for hackers, first, they can't disguise and cheat, second, they can't control the network by attacking a node

supply chain management

refers to the process of optimizing the operation of the supply chain from purchasing to meeting the final customers with the least cost. MBA, EMBA and other management ecation include the enterprise supply chain management

supply chain management is to coordinate the internal and external resources of enterprises to meet the needs of consumers. When we regard the enterprises in each link of the supply chain as a virtual enterprise alliance, and any enterprise as a department of the virtual enterprise alliance, the internal management of the alliance is supply chain management. However, the composition of the alliance is dynamic and changes at any time according to the needs of the market

effective supply chain management can help to achieve four goals: shorten cash flow time; Rece the risk faced by enterprises; Achieve profit growth

long; Provide predictable revenue

seven principles of Supply Chain Management: dividing customer groups according to the service characteristics required by customers; According to the customer demand and the profit situation of the enterprise, the logistics network of the enterprise is designed; Listen to market demand information and design procts closer to customers; Time delay; Strategic determination of

source of goods and procurement and establishment of win-win cooperation strategy with suppliers; Establish information system in the whole supply chain; Establish the performance evaluation criteria of the whole supply chain

although most people ignore the existence of agriculture, it does provide basic needs for our society. For young people, exploring the agricultural world is not attractive, mainly because of the lack of technical content in agricultural operation process. In addition, agriculture is a relatively complex business field, which needs more transparency and more perfect instry standards

and blockchain technology can change the status quo. Consumers all over the world prefer "clean" food, but procers have no way to verify the reliability of procts. Replacing the current supply chain management system with distributed accounting books can bring higher transparency and encourage consumers to buy food and procts after careful consideration

from a technical point of view, the use of blockchain in agriculture can realize intelligent supply chain management. But the whole agricultural management process needs a technical inspection. At present, agricultural technology solutions are either implemented by specific software or by service providers, but these two solutions are expensive and sometimes can not achieve the desired effect

recently, Emma, CEO of agridigital ( agriculture based on blockchain and smart contract supply chain management platform ); Emma Weston explained in detail how blockchain technology can solve the defects in the field of agriculture. The immutability of transactions and information in distributed account books is the key to solve all problems. Recording proct information on the blockchain is the most correct choice, and farmers, retailers and consumers can benefit from it

consumers are increasingly concerned about whether food is "clean" and organic, but procers and processors are usually unable to track and verify a series of accurate data related to procts from farm to table. Blockchain can help a lot. At present, there is no simple, accurate and effective way to track slave workers, raw material pollution and the origin of goods. At the same time, consumers are more willing to pay for the organic food with the above details. So far, we know that the root of the problem lies in certification and regulation, which are expensive, difficult to implement and confusing to consumers

the biggest problems faced by the agricultural sector are random pricing and high transaction fees. Once the supplier can not give a reasonable price, consumers are not willing to accept the final result. The cost of supply chain management greatly reces the interests of farmers, but also adds a lot of confusion to agricultural development

the development trend of block chain technology in the future agricultural field is still a mystery. However, there are many specific use cases, including land registration, big data monitoring, and even the application of smart contract. In the next ten years, there will be numerous use cases of blockchain in the field of agriculture, and the development prospect is very good

8. Hello, it is reported that the public platform of SMIC blockchain in Changsha is going to launch blockchain + human resource services recently. We can look forward to how they can do blockchain + human resource applications.