Problems that blockchain can solve

1. Jinwowo analysis believes that blockchain mainly solves the trust and security problems of transactions. Once the information is confirmed and added to the blockchain, it will be permanently stored. Unless more than 51% of the nodes in the system can be controlled at the same time, the modification of data on a single node cannot be realized. Therefore, the data stability and reliability of blockchain are very high
e to the use of Distributed Accounting and storage, there is no centralized hardware or management organization, the rights and obligations of each node are equal, and the data blocks in the system are jointly maintained by the nodes with maintenance function in the whole system.

2. 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.

3. Blockchain has a high degree of technical security and broad technology prospects. It is still in continuous development, improving enterprise efficiency and recing operating costs, and will graally be promoted and applied in other fields and instries
Renren chain is an enterprise level platform service based on mainstream blockchain technology, which can help you quickly build a more secure and stable blockchain environment, rece challenges in blockchain deployment, operation and maintenance, and development, and enable you to focus more on core business innovation, so as to realize fast business on the chain
in the current enterprise management mode, no matter customer relationship management, project management, procurement management, human resource management, there are data security and reliability problems to some extent. For example, sometimes transaction data under the market mechanism is untrue / fake / deleted and changed, and some problems such as making ill considered decisions e to data resource blocking occur, In the long run, it will cause harmful business impact on enterprises. Moreover, some enterprise systems are lack of real-time tracking in the process of the project, which is prone to data disorder and lag, resulting in the inability to timely monitor the project and track the responsibility, low management efficiency and so on, which can be avoided in the early selection of enterprises!

4. I choose Chinese currency! Low operation delay, idle can also save money mining EOS, very suitable.

5. The art instry
ascribe allows artists to declare ownership by using blockchain technology, issue numbered, limited edition works, and target any type of art in digital form. It even includes a trading market where artists can buy and sell through their websites without any intermediary services<

in the legal instry
bitproof is the most advanced of many document timestamp applications emerging in recent years, which will make the traditional notarization method a thing of the past. Bitproof offers more services than free versions including blocksgin and originstaemp, including one for intellectual property. Interestingly, bitproof recently cooperated with an it school in San Francisco to put their students' academic certificates on the blockchain, completely redefining how to handle and use diplomas and student certificates<

development instry
colu is the first enterprise to allow other enterprises to issue digital assets. Many people are impressed that they can "token" all kinds of assets. Although the free bitcoin wallet couperparty also allows simple tokens to be issued and traded among other wallet holders, the tokens of colu can be set with various states and types, can be detached from or returned to the system, and can be stored on BitTorrent's network when the data stored on the blockchain is too large<

the real estate instry
they plan to modernize the whole instry chain process and solve various problems faced by everyone when participating in real estate, including naming process, land registration, agency, etc
viewing blockchain from a financial perspective
the essence of money: money is just a kind of broad value consensus, and it does not have value precipitation
the relationship between assets and currency: currency describes assets
what is digital assets: assets are digital, segmentable and tradable, and the price is determined by the supply and demand market, not by the value intermediary currency<

Internet of things
application scenario analysis [7]
a possible application scenario is: generate corresponding behavior through transaction, assign address to each device, inject a certain fee into the address, and perform relevant actions, so as to achieve the application of Internet of things. Similar to: PM2.5 monitoring point data acquisition, server leasing, webcam data call, DNS server, etc
in addition, with the increasing number of Internet of things devices and the increasing demand for edge computing, a large number of devices need to adopt a distributed self-organization management mode, and the requirement for fault tolerance is very high. The distributed and anti attack characteristics of blockchain can be well used in this scenario
IBM [7]
IBM has continuously invested in the research and development of the Internet of things for decades, and is exploring the use of blockchain technology to rece the cost of Internet of things applications
in early 2015, IBM and Samsung announced their cooperation in developing adept system
logistics supply chain [7]
the supply chain instry often involves many entities, including logistics, capital flow, information flow, etc. there are a lot of complex cooperation and communication between these entities. Under the traditional mode, different entities keep their own supply chain information, which is seriously lack of transparency, resulting in higher time cost and money cost, and it is difficult to trace and deal with problems (false claim, counterfeit goods, etc.)
through the blockchain, all parties can obtain a transparent and reliable unified information platform, which can view the status in real time, rece the logistics cost, and trace the whole process of proction and transportation of goods, so as to improve the efficiency of supply chain management. When disputes arise, the proof and tracing become clearer and easier
this field is considered as a promising application direction of blockchain
for example, the carrier can scan the QR code to prove that the goods arrive at the designated area, and automatically charge the fees agreed in advance. We can refer to how the blockchain changes the supply chain finance and brings transparency to the supply chain
skuchain creates a new supply chain solution based on blockchain to realize the synchronization of commodity flow and capital flow, and alleviate the problem of counterfeit goods
public network service [7]
the normal operation of the existing Internet is inseparable from many nearly free network services, such as domain name service (DNS). Anyone can query the domain name for free. Without DNS, all kinds of websites can't be accessed. Therefore, for the network system, similar basic services must be safe, reliable and low-cost
blockchain technology just has these characteristics. The DNS system based on blockchain will no longer have all kinds of wrong query results, and can provide services stably and reliably

Insurance Instry
in the past two years, the hottest topic in the field of science and technology can not be separated from blockchain technology. This underlying technology, born out of bitcoin, has proved its highly secure and reliable architecture and algorithm design with more than seven years of stable operation. At the same time, with innovative technologies such as distributed ledger and smart contract, it has opened up a huge imagination space for instrial upgrading of many instries. Some instry experts even predict that blockchain technology will set off the second Internet revolution
the financial instry has always been the most sensitive to advanced technology. Traditional banking and securities giants have been investing in blockchain venture capital since 2014. In two years, the total global investment is as high as US $1 billion, and there is no lack of a-round financing such as US $60 million of Dah and US $50 million of blockstream. In addition to capital investment, major companies have personally participated in and promoted specific business applications: for example, the LINQ blockchain equity exchange launched by the Nasdaq Stock Exchange in the United States has started issuing tests at the end of 2015; The R3 CEV alliance formed by 43 multinational banks in the world has been testing and improving the inter-bank clearing alliance chain, with unprecedented speed and participation
although the insurance instry's participation in blockchain technology is relatively conservative, it has been actively exploring and researching in the academic field. At the end of 2014, the 50 page "lifelong chain" special research report launched by the European and American insurance instry forum initiated by the famous Z / yen Group Consulting Group in the UK discussed the innovation and change that blockchain will bring to the insurance instry from many aspects
while studying blockchain technology, I have exchanged with many domestic experts and scholars in the insurance instry, and deeply discussed the specific foothold of blockchain in the insurance business from the perspectives of business process and company management. Now I share with readers some thoughts on credit risk management.

6. Blockchain technology provides a kind of machine trust in the form of "machine code, formal proof, decentralization, distribution and information system". This kind of machine trust no longer needs the help of a third-party centralized organization. On the basis of machine trust, people can cooperate and trade even if they don't know each other. Relying on the powerful technical functions of blockchain, GTA subverts the traditional business model of gene technology, uses cryptography technology to confirm the sovereignty of personal gene data and protect the privacy of personal information. By using the economic incentive mechanism of pass, large-scale indivial users, market promoters, gene sequencing institutions, data storage institutions and data users are encouraged to actively participate in and cooperate, so as to quickly gather a large amount of gene data; Then, the business value is realized by the wide application of gene big data in the field of life and health.

7. In the same instry, the maintenance technology of hengshida is very exquisite. It is a clock service company with a long history and many national chain stores. Room 2301, 23 / F, phase 1, Henglong Plaza, 1266 Nanjing West Road, Jing'an District, Shanghai < br > < br > hengshida specializes in the maintenance of such world-class brand watches as Patek Philippe, Constantine, Wanguo, Abbey, Earl, Baoji, zhenlishi, glasuti, Rolex, imperial rudder, Omega, Chopin, Longines, as well as antique watches and customized high-end watch strap, and can provide regular maintenance for your watches. Your watch here can get on-site transparent maintenance, wait and take< Br > < br > a watch needs careful care. Only in this way can it prolong its life and keep you company for a longer time. Shanghai hengshida watch Co., Ltd. adheres to the business tenet of "pursuit of customer satisfaction service" and the service concept of "customer first, keep improving". With professional technology and resource allocation to provide customers with high quality maintenance service. Strive for the goal of "highlighting self, facing society, serving the public and creating quality life together"< br>

8. The relatively stable currencies in foreign exchange are US dollar and euro< Note:
1. Foreign exchange is the creditor's right that the monetary Administration (central bank, monetary administration, foreign exchange stabilization fund and the Ministry of Finance) can use in the event of balance of payments deficit in the form of bank deposits, treasury bonds of the Ministry of finance, long-term and short-term government securities, etc
it includes foreign currency, foreign currency deposits, foreign currency securities (government bonds, treasury bonds, corporate bonds, stocks, etc.), and foreign currency payment certificates (bills, bank deposit certificates, postal savings certificates, etc.)< Foreign exchange currency pairs have the following currencies:
1. US dollar (USD): the monetary unit of the United States. More than 80% of international trade and foreign exchange transactions use US dollar as the valuation currency. The US dollar is the most active currency and plays an absolutely important role in international trade and finance
2. Euro: the unified currency of the European Monetary Union. With more than a dozen member countries and more than 300 million people, this alliance has higher supply capacity than the United States, so the euro has the same strength as the US dollar
3. British pound (GBP): the monetary unit of the United Kingdom. After the Bretton Woods conference in 1944, the US dollar replaced the pound as the world's financial hegemony, and now the pound has become the third largest reserve currency in the world< 4. Japanese yen (JPY): the monetary unit of Japan. In terms of economic and trade relations, Japan's trade surplus mainly comes from the United States, while the foreign trade of the United States mainly comes from Japan. The yen is still the most important currency in Asia
5. Hong Kong dollar (HKD): the monetary unit of Hong Kong Special Administrative Region of China. The Hong Kong dollar is famous for its linked exchange rate system, which is based on the US dollar and maintains a fixed exchange rate
6. Swiss Franc (CHF): the legal tender of the Swiss Federation. Switzerland is a neutral country, the domestic political and economic situation is stable, and the Swiss bank is the most confidential bank in the world, so the Swiss franc is often the rival currency of the US dollar.