Reflections on blockchain

4. A: blockchain technology has been applied in many fields
I. financial field
blockchain has great potential application value in international exchange, letter of credit, equity registration, stock exchange and other financial fields< Second, the Internet of things and logistics
blockchain can also be naturally combined in the field of Internet of things and logistics. Through blockchain, we can rece logistics costs, trace the proction and delivery process of goods, and improve the efficiency of supply chain management. This field is considered as a promising application direction of blockchain
Third, public service
blockchain is closely related to people's proction and life in public management, energy, transportation and other fields, but the centralization of these fields also brings some problems, which can be transformed by blockchain
IV. in the field of digital right
through blockchain technology, works can be authenticated to prove the existence of text, video, audio and other works and ensure the authenticity and uniqueness of ownership< 5. In the field of insurance
in terms of insurance claims, insurance institutions are responsible for fund collection, investment and claims settlement, and often have higher management and operation costs< 6. In the field of public welfare, the data stored on the blockchain is highly reliable and tamperable, which is naturally suitable for social public welfare scenarios.

5. Patents have always been controversial in the field of cryptocurrency and blockchain, because most projects are built on the premise of decentralization and open source. It is for this reason that the concept of intellectual property (IP) is highly controversial
for this purpose, the following search terms are used to collect the website data of the World Intellectual Property Organization (WIPO): blockchain, blockchain, bitcoin, virtual currency, virtual currency, digital currency, digital token and smart contract
the analysis found that although the price of bitcoin plummeted, 2018 was the year with the most patents approved, and records showed that at least 1060 patents were published ring this period

971 items were approved in 2017. In that year, bitcoin began trading at $998, reaching an all-time high of $19666 in December
according to the data, patent approval started to take off in 2012, and it remained at the same level until 2015. So far this year, the World Intellectual Property Organization has granted 242 patents related to cryptocurrency or blockchain
China ranks first with 790 patents
followed by the United States, which approved 762 patent applications. South Korea and Australia followed, 161 and 132 respectively. The UK is the only European country in the top 10 with 36 approvals

the companies on the list are mainly technology giants and financial service companies, such as IBM (119 items), MasterCard MasterCard (111 items), coinplug (84 items) and Alibaba (60 items)< Among them, Yao Qian, director of the digital currency Research Institute of the people's Bank of China, has obtained 92 patents.

6. Blockchain application fields:
1. Financial field. Blockchain has great potential application value in international exchange, letter of credit, equity registration, stock exchange and other financial fields. The application of blockchain technology in the financial instry can save the third-party intermediary link and realize the point-to-point direct docking, so as to greatly rece the cost and quickly complete the transaction payment< 2. Internet of things and logistics. Blockchain can also be naturally combined in the field of Internet of things and logistics. Through blockchain, we can rece logistics costs, trace the proction and delivery process of goods, and improve the efficiency of supply chain management. This field is considered as a promising application direction of blockchain

3. Public service. Blockchain is closely related to people's proction and life in public management, energy, transportation and other fields, but the centralization of these fields also brings some problems, which can be transformed by blockchain. The decentralized and fully distributed DNS service provided by the blockchain can realize domain name query and resolution through the point-to-point data transmission service between nodes in the network. It can be used to ensure that the operating system and firmware of an important infrastructure have not been tampered with. It can monitor the status and integrity of the software and detect bad tampering, And ensure that the data transmitted by the system using the Internet of things technology has not been tampered with< 4. Digital rights. Through blockchain technology, works can be authenticated to prove the existence of text, video, audio and other works, and ensure the authenticity and uniqueness of ownership. After the works are confirmed on the blockchain, the subsequent transactions will be recorded in real time to realize the full life cycle management of digital rights, and can also be used as a technical guarantee in judicial evidence collection. For example, mine labs, a start-up company in New York, developed a metadata protocol based on blockchain. This system called mediachain uses IPFs file system to realize right protection of digital works, mainly for right protection applications of digital pictures

5. Insurance. In terms of insurance claims, insurance institutions are responsible for fund collection, investment and claims settlement, and often have higher management and operation costs. Through the application of smart contract, there is no need for the applicant to apply or the insurance company to approve. As long as the claim conditions are triggered, the automatic claim settlement of the policy can be realized. A typical application case is lenderbot, which was launched by the blockchain enterprise stratumdeloitte and payment service provider lemonway in 2016. It allows people to register customized micro insurance procts through the chat function of Facebook messenger to insure the high value items exchanged between indivials, and the blockchain replaces the third party role in the loan contract< 6. Public welfare. The data stored on the blockchain is highly reliable and tamperable, which is naturally suitable for social public welfare scenarios. The relevant information in the public welfare process, such as donation project, collection details, fund flow, recipient feedback, etc., can be stored on the blockchain, and can be made transparent and public, which is convenient for social supervision.

7. Red police home, there is a modifier