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Is there a blockchain
Publish: 2021-05-16 04:00:42
1. blockchain mainly solves the trust and security problems of transactions, so it proposes four technological innovations to solve this problem:
(1) distributed ledger, that is, transaction bookkeeping is completed by multiple nodes distributed in different places, and each node records complete accounts, so they can participate in monitoring the legitimacy of transactions, At the same time, they can testify together
different from traditional distributed storage, the uniqueness of distributed storage of blockchain is mainly reflected in two aspects: one is that each node of blockchain stores complete data according to block chain structure, while traditional distributed storage generally stores data in multiple copies according to certain rules. Second, the storage of each node in the blockchain is independent and has the same status, which relies on the consensus mechanism to ensure the consistency of storage, while the traditional distributed storage generally synchronizes data from the central node to other backup nodes[ 8]
no single node can record the account data separately, so as to avoid the possibility that a single bookkeeper is controlled or bribed to record false accounts. In theory, unless all the nodes are destroyed, the accounts will not be lost, so as to ensure the security of the account data
(2) asymmetric encryption and authorization technology, the transaction information stored on the blockchain is public, but the account identity information is highly encrypted, which can only be accessed under the authorization of the data owner, thus ensuring the data security and personal privacy
(3) consensus mechanism is how to reach a consensus among all accounting nodes to determine the validity of a record, which is not only a means of identification, but also a means of preventing tampering. Blockchain proposes four different consensus mechanisms, which are suitable for different application scenarios and achieve a balance between efficiency and security
the consensus mechanism of blockchain has the characteristics of "the minority is subordinate to the majority" and "everyone is equal", in which "the minority is subordinate to the majority" does not completely refer to the number of nodes, but also can be the computing power, the number of shares or other characteristics that can be compared by computers“ "Everyone is equal" means that when the nodes meet the conditions, all nodes have the right to put forward the consensus results first, and then directly recognized by other nodes, and finally may become the final consensus results. Taking bitcoin as an example, the workload proof is adopted. Only when more than 51% of the accounting nodes in the whole network are controlled can a nonexistent record be forged. When there are enough nodes in the blockchain, this is basically impossible, thus eliminating the possibility of fraud.
(4) smart contract, which is based on these trusted and tamperable data, can automatically execute some pre-defined rules and terms. Take insurance as an example. If everyone's information (including medical information and risk occurrence information) is true and reliable, it is easy to carry out automatic claim settlement in some standardized insurance procts
(1) distributed ledger, that is, transaction bookkeeping is completed by multiple nodes distributed in different places, and each node records complete accounts, so they can participate in monitoring the legitimacy of transactions, At the same time, they can testify together
different from traditional distributed storage, the uniqueness of distributed storage of blockchain is mainly reflected in two aspects: one is that each node of blockchain stores complete data according to block chain structure, while traditional distributed storage generally stores data in multiple copies according to certain rules. Second, the storage of each node in the blockchain is independent and has the same status, which relies on the consensus mechanism to ensure the consistency of storage, while the traditional distributed storage generally synchronizes data from the central node to other backup nodes[ 8]
no single node can record the account data separately, so as to avoid the possibility that a single bookkeeper is controlled or bribed to record false accounts. In theory, unless all the nodes are destroyed, the accounts will not be lost, so as to ensure the security of the account data
(2) asymmetric encryption and authorization technology, the transaction information stored on the blockchain is public, but the account identity information is highly encrypted, which can only be accessed under the authorization of the data owner, thus ensuring the data security and personal privacy
(3) consensus mechanism is how to reach a consensus among all accounting nodes to determine the validity of a record, which is not only a means of identification, but also a means of preventing tampering. Blockchain proposes four different consensus mechanisms, which are suitable for different application scenarios and achieve a balance between efficiency and security
the consensus mechanism of blockchain has the characteristics of "the minority is subordinate to the majority" and "everyone is equal", in which "the minority is subordinate to the majority" does not completely refer to the number of nodes, but also can be the computing power, the number of shares or other characteristics that can be compared by computers“ "Everyone is equal" means that when the nodes meet the conditions, all nodes have the right to put forward the consensus results first, and then directly recognized by other nodes, and finally may become the final consensus results. Taking bitcoin as an example, the workload proof is adopted. Only when more than 51% of the accounting nodes in the whole network are controlled can a nonexistent record be forged. When there are enough nodes in the blockchain, this is basically impossible, thus eliminating the possibility of fraud.
(4) smart contract, which is based on these trusted and tamperable data, can automatically execute some pre-defined rules and terms. Take insurance as an example. If everyone's information (including medical information and risk occurrence information) is true and reliable, it is easy to carry out automatic claim settlement in some standardized insurance procts
2. 1. Public chain, no official organization and management organization, no central server, participating nodes freely access to the network according to the system rules, not controlled, and work based on consensus mechanism among nodes Subversive: absolutely credible and open) < br > typical case: digital currency represents bitcoin < br > 2. The private chain is built within a group. The operation rules of the system are set according to the requirements of the group, and the modification or read permissions are limited to some extent, while maintaining the authenticity and partial decentralization of the blockchain Typical case: R3 < br > 3. Alliance chain, jointly initiated by several institutions, is between the public chain and the private chain, and has the characteristics of partial decentralization. The read permission on the fast chain in this area may be public or partially public, that is to say, multiple pre selected nodes are designated as bookkeepers internally, and the pre selected nodes compete for bookkeeping permission, Other access nodes can participate in the transaction, but not the accounting process The abilities of the candidates should not be uneven< Br > (relatively credible and open) < br > existing cases: Super ledger < br > example:? In the case of loan diversion, when the user jumps to the other party's website for registration through our link, the docking party can choose to cheat and say that it has not received the user's registration request. However, if we put the user registration behavior into the block, if the docking party wants to receive the user registration behavior, it must pay us at the same time.
3. If century Jiayuan wants a mobile phone number, 80% of them are cheaters. This website will try to use some member information to cheat other members' mobile phone numbers. Once it wants a mobile phone number, it will call you and ask if you need matchmaker one-to-one service. My friend signed up for this website and left an old number. The new number was left to a person with good information. However, it didn't take long for this person's information to be closed. It's estimated that my friend's mobile phone number will be hacked. After that, some website staff called to ask whether to provide one-on-one service. My friend has bought a diamond member, As a result, they still cheat others by immoral means. So don't leave any numbers.
4. 1、 Property law is the gospel of property owners
Article 12 of the constitution of the people's Republic of China stipulates that "socialist public property is sacred and inviolable", "no organization or indivial is allowed to occupy or damage state and collective property by any means", and Article 13 stipulates that "citizens' legitimate private property is inviolable", "The state protects citizens' private property rights and inheritance rights in accordance with the law.". The second paragraph of Article 73 of the general principles of civil law stipulates that "state property is sacred and inviolable" Article 4 of the property law stipulates: "the property rights of the state, the collective, the private and other right holders shall be protected by law and shall not be infringed by any unit or indivial." It can be seen that the equal protection of public property and private property in the property law actually improves the relative legal status of private property and establishes the principle that private property and public property have the same civil status, which lays the foundation for the legal restoration of the universal equal civil relationship between state-owned and non-state-owned property rights, Moreover, combined with the fact that the income and wealth of Chinese citizens have generally increased since the reform and opening up, the "property owners" protected by the property law have covered the actual interests of the vast majority of the Chinese people< Second, the property law is about the legal appreciation of RMB.
in the legislative explanation and deliberation report, the property law has made positive explanations or provisions on the right to contracted management of rural land, the right to use homestead, the right to use urban commercial residential land and other major property rights involving the vital interests of the masses, It fully reflects the principle of respect and retroactive protection for citizens' real right in fact. For example, Article 149 of the property law stipulates: "if the term of the right to use residential construction land expires, it will be automatically renewed." This is not only a supplement and improvement to the unreasonable legal provisions in the past from the perspective of social stability, but also a concrete manifestation of respecting citizens' factual rights to "things" -- the vital interests of the overwhelming majority of the people are the most important social public interests, and the law, as a form of protection, should only adapt to it rather than become a system shackle, The legislative practice of property law vividly implements the basic principles of "seeking truth from facts", "respecting facts" and "people-oriented". In terms of "automatic renewal of the right to use residential construction land" only, the property law dispels the huge interest ambiguity and injects huge future economic expectations for the real estate instry, which occupies an important proportion in the national economy. In other words, through the property law, the real estate instry has the right to use residential construction land, After the expiration of the term of the right to use residential construction land, the huge rights and interests of the state owned by the original provisions are clearly retained by the original property owner according to the fact of possession of the "property", which is actually a huge, clear and legally guaranteed social investment for the real estate economy through legislation. From the above point of view, the property law opens up the operation space for the legal appreciation of the important social universal property rights, which is not only beneficial to the asset appreciation of the related instries and fields involved in the rural land contractual management right, the right to use homestead, the right to use urban commercial residential land, but also a legal appreciation of RMB< Thirdly, the economic significance of the property law is underestimated by the society.
at present, we need to further study the economic significance of the property law and look for the significant impact of the implementation of the property law on the real estate economy, financial economy and rural economy. We must pay attention to that this is an objective fact, What's more, it is an important effect that will continue to play a role in the future, or it is a far-reaching event that touches all fields of China's social and economic life. A realistic suggestion is that it is necessary for the economic instry and the general market people to explore the strategic influence from the property law in combination with their own reality, so as to obtain specific and practical strategic enlightenment
Article 12 of the constitution of the people's Republic of China stipulates that "socialist public property is sacred and inviolable", "no organization or indivial is allowed to occupy or damage state and collective property by any means", and Article 13 stipulates that "citizens' legitimate private property is inviolable", "The state protects citizens' private property rights and inheritance rights in accordance with the law.". The second paragraph of Article 73 of the general principles of civil law stipulates that "state property is sacred and inviolable" Article 4 of the property law stipulates: "the property rights of the state, the collective, the private and other right holders shall be protected by law and shall not be infringed by any unit or indivial." It can be seen that the equal protection of public property and private property in the property law actually improves the relative legal status of private property and establishes the principle that private property and public property have the same civil status, which lays the foundation for the legal restoration of the universal equal civil relationship between state-owned and non-state-owned property rights, Moreover, combined with the fact that the income and wealth of Chinese citizens have generally increased since the reform and opening up, the "property owners" protected by the property law have covered the actual interests of the vast majority of the Chinese people< Second, the property law is about the legal appreciation of RMB.
in the legislative explanation and deliberation report, the property law has made positive explanations or provisions on the right to contracted management of rural land, the right to use homestead, the right to use urban commercial residential land and other major property rights involving the vital interests of the masses, It fully reflects the principle of respect and retroactive protection for citizens' real right in fact. For example, Article 149 of the property law stipulates: "if the term of the right to use residential construction land expires, it will be automatically renewed." This is not only a supplement and improvement to the unreasonable legal provisions in the past from the perspective of social stability, but also a concrete manifestation of respecting citizens' factual rights to "things" -- the vital interests of the overwhelming majority of the people are the most important social public interests, and the law, as a form of protection, should only adapt to it rather than become a system shackle, The legislative practice of property law vividly implements the basic principles of "seeking truth from facts", "respecting facts" and "people-oriented". In terms of "automatic renewal of the right to use residential construction land" only, the property law dispels the huge interest ambiguity and injects huge future economic expectations for the real estate instry, which occupies an important proportion in the national economy. In other words, through the property law, the real estate instry has the right to use residential construction land, After the expiration of the term of the right to use residential construction land, the huge rights and interests of the state owned by the original provisions are clearly retained by the original property owner according to the fact of possession of the "property", which is actually a huge, clear and legally guaranteed social investment for the real estate economy through legislation. From the above point of view, the property law opens up the operation space for the legal appreciation of the important social universal property rights, which is not only beneficial to the asset appreciation of the related instries and fields involved in the rural land contractual management right, the right to use homestead, the right to use urban commercial residential land, but also a legal appreciation of RMB< Thirdly, the economic significance of the property law is underestimated by the society.
at present, we need to further study the economic significance of the property law and look for the significant impact of the implementation of the property law on the real estate economy, financial economy and rural economy. We must pay attention to that this is an objective fact, What's more, it is an important effect that will continue to play a role in the future, or it is a far-reaching event that touches all fields of China's social and economic life. A realistic suggestion is that it is necessary for the economic instry and the general market people to explore the strategic influence from the property law in combination with their own reality, so as to obtain specific and practical strategic enlightenment
5. 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.
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.
6. Blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies
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.
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.
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