What does blockchain technology include
block head: record the characteristic value of the current block
block body: actual data
the core idea of blockchain is decentralization
in the blockchain system, the rights and obligations of any node are equal, and all nodes have the ability to vote with computing power, Thus, the result recognized by more than half of the nodes is guaranteed. Even under serious hacker attacks, as long as the number of nodes controlled by hackers does not exceed half of the total number of nodes in the world, the system can still operate normally and the data will not be tampered with
block chain's biggest subversive nature is the establishment of credit
theoretically, block chain technology can make WeChat payment and Alipay no longer exist value. The economist makes an image metaphor for blockchain: in short, it is "a machine for creating trust". Blockchain enables people to cooperate with each other in the case of mutual distrust and no neutral central institution. The fight against counterfeit money and financial fraud will not be needed in the future
the collective maintenance of blockchain can rece the cost
under the centralized network system, the maintenance and operation of the system depend on the operation and maintenance of platforms such as data center, and the cost cannot be omitted. Anyone can participate in the nodes of the blockchain. Each node can verify the correctness of the results of other nodes' records while participating in the records, which improves the maintenance efficiency and reces the cost
in a word, blockchain touches money, trust and power, which are the fundamental basis for human survival.
A: the main application fields of blockchain technology are finance, Internet of things and logistics, public service, digital right, insurance and public welfare
First, in the field of finance,
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 logisticsblockchain 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
Third, in the field of public service, blockchain is closely related to people's proction and life in the fields of public management, energy and transportation. However, the centralization of these fields also brings some problems, which can be transformed by blockchain Fourthly, 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 In the field of insurance, insurance institutions are responsible for fund collection, investment and claim settlement, and often have higher management and operation costs Sixth, the data stored on the public welfare fieldblockchain 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
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.
the structure of general blocks is divided into block head and block body
the block header contains the identification information of each block, and the most important information is the header hash value, which is completely consistent with the parent hash value of the next block, so as to realize the concatenation of two adjacent blocks and finally get an orderly connected blockchain. Through any block in the blockchain, all blocks before or after this block can be traced.
What is the value of blockchain application technology. Everyone's resume is put on the block, and the content of each item needs to be confirmed to ensure the authenticity < / OL >
2. Proct traceability. Every proct information is registered in detail on the block, every link, to avoid fakes
3. Copyright certification. Register all the right information on the blockchain, once it comes to right issues, it can effectively protect its own intellectual property rights
4. Medical data. Online medical information can be transferred between different hospitals, and patients' conditions can be queried through the block browser, which can also avoid misdiagnosis
5. Everyone's credit information can be registered on the chain, and the credit information between banks can be exchanged, so that Laolai has no place to hide and avoid risks
6. Insurance. In the future, everyone's health status, accident records, medical information and other information can be uploaded to the blockchain. Insurance companies can obtain risk information more timely and accurately, so as to improve efficiency and enhance customer trust. The transparent sharing in the blockchain reces the information asymmetry, tracks its historical source, facilitates management, and eliminates fraud