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Ⅰ A popular explanation of what blockchain is
Question 1: What is blockchain? Can you explain the principles of 10-point blockchain in plain language: Decentralized distributed accounting system
The core of blockchain technology is that all currently participating nodes jointly maintain transactions and databases. It makes transactions based on cryptographic principles rather than trust, so that any two parties who reach an agreement, Payment transactions can be performed directly without the involvement of a third party.
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Technically speaking, a block is a data structure that records transactions, reflecting the flow of funds for a transaction. The blocks of transactions that have been reached in the system are connected together to form a main chain, and all nodes participating in the calculation record the main chain or part of the main chain. A block contains the following three parts: transaction information, hash hash formed by the previous block, and random number. Transaction information is the task data carried by the block, specifically including the private keys of both parties to the transaction, the number of transactions, the digital signature of electronic currency, etc.; the hash formed by the previous block is used to connect the blocks to realize the past The order of transactions; random numbers are the core of transaction completion. All miner nodes compete to calculate the answer to the random number. The node that gets the answer the fastest generates a new block and broadcasts it to all nodes for update, thus completing a transaction.
1.1 What is Blockchain
Blockchain (BlockChain) refers to a technical solution that collectively maintains a reliable database through decentralization and trustlessness. This technical solution mainly allows any number of nodes participating in the system to associate and generate a series of data blocks (blocks) using cryptographic methods. Each data block contains all the information exchange data of the system within a certain period of time, and generates The data fingerprint is used to verify the validity of its information and chain to the next database block.
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In layman’s terms, blockchain technology refers to a way for all people to participate in accounting. Behind all systems there is a database, which is a big ledger. Then who will keep this ledger becomes very important. At present, it is whoever owns the system who keeps the accounts. Each bank’s account books are kept by each bank, and Alipay’s account books are kept by Alibaba. But now in the blockchain system, everyone in the system has the opportunity to participate in accounting. If there are new transaction data changes within a certain period of time, everyone in the system can do accounting. The system will judge the person who has the fastest and best accounting during this period, write the recorded content to the ledger, and Send the contents of the ledger during this period to all other people in the system for backup. In this way, everyone in the system has a complete ledger. Therefore, this data becomes very safe. A tamperer needs to modify more than half of the system node data at the same time to truly tamper with the data. Such tampering would be extremely costly, making it nearly impossible. For example, Bitcoin has been running for more than 7 years, and countless hackers around the world have tried to attack Bitcoin, but so farThere have been no transaction errors so far, and it can be considered that the Bitcoin blockchain has proven to be a safe and reliable system.
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1.2 Why is there blockchain innovation?
Human beings need to communicate during their activities, and communication is based on information. In the past, information circulation was not convenient enough to satisfy market participants. There is a demand for information, so intermediaries and centers are born. This centralized system has problems such as high cost, low efficiency, value dispersion, "information islands" and insecure data storage. However, due to technical and environmental factors, this system continued to operate for many years until the emergence of the Internet. The starting point of the first generation of the Internet is the TCP/IP protocol, which is an open code that implements a unified format for peer-to-peer transmission of information by all nodes on the network, and brings the basic values of freedom and equality required by a global unified market into programmed, protocol-based, and reliably Execution. The Internet eliminates low-value, high-cost intermediate chains and achieves low-cost and high-efficiency global information transmission in a decentralized manner.
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However, the first generation of the Internet did not solve the problem of information credibility. Activities that can be decentralized on the Internet must be activities that do not require credit endorsement, and activities that require credit guarantee must be activities involving centralized third-party intermediaries. Therefore, Internet technology that cannot establish global credit has encountered great obstacles in its progress - people cannot participate in any value exchange activities on the Internet in a decentralized manner. To realize value exchange, people still need third-party intermediaries based on credit (such as banks, clearing agencies, exchanges). The global centralized credit system still has problems such as high operating costs, low efficiency, and vulnerability to attacks and damage. For example, each country's legal currency has different credit values and incompatible clearing systems, which adds a lot of cost to global trade.
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Therefore, what the second generation Internet must break through is: how to establish global credit in a decentralized manner? Let...>>
Question 2: What is blockchain? What does it mean in layman’s terms? What is China’s attitude towards blockchain? What can blockchain do? Blockchain, a great technology that accompanied the birth of Bitcoin, is currently being used in the financial field to significantly reduce transaction costs and improve efficiency, which is enough to excite Wall Street. However, this is just the tip of the iceberg. Its potential applications are very broad and will subvert every aspect of our lives in the future.
Blockchain is an important concept of Bitcoin. It is essentially a decentralized database and serves as the underlying technology of Bitcoin. One of the most basic characteristics of Bitcoin is decentralization. In recent months, financial giants have gradually begun to pay attention to Bitcoin's technology and used it in non-monetary fields, such as stock trading, election voting, etc. (1) Art industry
Artists can use blockchainTechnology to claim ownership and issue numberable, 100% editions of works in digital form for any type of artwork. It even includes a marketplace where artists can buy and sell through their website without the need for any intermediary services.
(2), Real estate industry
Use blockchain technology to solve various problems faced by everyone involved in real estate, including the naming process, land registration, agency intermediaries, etc.
(3), Insurance Industry
The financial industry has always been the most sensitive to advanced technology. Traditional banking and securities industry giants have been involved in the booming blockchain venture capital investment since 2014, with total global investment reaching US$1 billion within two years.
(4) P2P wallet
Personal assets can be traded through this P2P wallet in the future without going through any central institution, such as Bitcoin.
Most blockchains are in their infancy, mainly overseas. There are very few good domestic blockchain projects, so it is not recommended for any non-professionals to invest in blockchain projects. If you are very interested in blockchain technology and have a technical or financial background, it is recommended that you consider starting a business in this area. In terms of the blockchain protocol system, the lowest layer is the underlying technology of the blockchain, including the technical protocols of the blockchain, as well as some platform routing and basic algorithms; in the middle layer, some application interfaces and some credentials must be solved Issuance and verification, including some industry platform services, big data analysis, etc. This is a very rough classification, and there should be more detailed classifications; the top ones are some applications of blockchain, including finance Some applications and some applications in other aspects, the Internet of Things and so on.
Introduction to Bubi Blockchain
Bubi Blockchain has been focusing on the research and development and innovation of blockchain technology and products since its establishment. It has a number of core technologies and has achieved substantial results in many aspects. Radical innovation has resulted in a number of core technological achievements, such as: mathematically provable distributed consensus technology, fast large-scale ledger access technology, multi-chain general ledger technology that supports business expansion, and interconnection technology between heterogeneous blockchains. wait. On April 25, "Gege Points" introduced the concept of blockchain into the points system, jointly opened it up with multiple parties, issued and redeemed points, and promoted the circulation of points. Each cooperative institution can jointly participate in transaction verification, ledger storage, and real-time settlement; the third-party payment platform of the enterprise points issuer makes the entry and exit of points more flexible. Bubi has developed its own basic blockchain service platform, which has been applied in equity, supply chain, points, credit and other fields. Bubi has been committed to building an open value circulation network with decentralized trust as the core, allowing digital assets to flow freely.
A simple understanding of blockchain is a technology at the bottom of Bitcoin, which is also a peer-to-peer electronic cash system that can realize peer-to-peer value delivery. We should distinguish between Bitcoin, Bitcoin blockchain, blockchain and blockchain. Blockchain technologyConcepts such as technology. In countries with relatively developed finance in the past, finance and blockchain technology have a long history, and the legislation of digital currencies and blockchain networks is also very important. With the advent of the financial era, large financial institutions are studying blockchain technology. They have their own teams and conceptual technologies. Slowly, banks in various regions are also participating in digital currency discussions. The application and support of this technology are not only that. The influence of blockchain on enterprises is also huge. For larger domestic enterprises, Bubi Blockchain is also used in various equity, supply chain, points and other fields. Major domestic financial institutions and enterprises have taken a fancy to the new industry. value, they have developed their own blockchain platforms, and blockchain has instantly become a new innovative industry in China. In terms of overseas internationalization, the United States has already obtained 15 blockchain patents at the end of last year compared to China. Blockchain financial applications are entering a new stage in an all-round way. Various applications will become more and more in-depth, and related changes will also become more and more profound. It has attracted more and more attention and will form a huge new trend... >>
Question 3: What is blockchain technology? What exactly is blockchain? What is blockchain? 1. Data blockchain is an important concept in the Bitcoin financial system. It records transaction record data on the entire Bitcoin network, and these data are shared by all Bitcoin nodes. Through the data block, we can query each transaction record. A look at the history of Bitcoin transactions. 2. Example: There are three persons A, B, and C. All funds of A and B are kept by C. And every financial transaction must be recorded by C. Now assume that A and B each have 1 million in custody of C. Then: A spends 80,000 yuan to B, then C's account book record will subtract 80,000 yuan from A's name, and add 80,000 yuan to B's name. If B transfers 50,000 yuan to A, C will add 50,000 yuan to A's name and subtract 50,000 yuan to B's name in the account book. A spends 50,000 yuan to B, then C's account book record will subtract 50,000 yuan from A's name, and add 50,000 yuan to B's name. 3. The role of the data blockchain is similar to that of C’s account record book. It records the user’s ownership of Bitcoin and the records of all users’ Bitcoin transactions. It’s just that this “account record book” is recorded by the mining software of every Bitcoin miner on the network. If a Bitcoin transaction is confirmed by the data blockchain, the relevant information will be recorded in the data blockchain. Bitcoin’s “account record book” is called the data blockchain. All data blockchains on the network form Bitcoin’s distributed network database system. 4. The essence of data blockchain technology is a decentralized and distributed structure of data storage, transmission and certification methods. It uses data blocks to replace the current Internet's dependence on central servers, so that all data changes or transaction items are recorded. On a cloud system, the self-certification of data during data transmission is theoretically realized. In a far-reaching sense, this transcends the traditional and conventional information verification paradigm that relies on a center and reduces the cost of establishing global "credit."This point-to-point verification will produce a "basic protocol", which is a new form of distributed artificial intelligence and will establish a new interface and shared interface between human brain intelligence and machine intelligence.
Question 4: What is blockchain: This explanation of blockchain is more understandable. Blockchain refers to a technology that collectively maintains a reliable database through decentralization and trustlessness. plan.
In layman’s terms, blockchain technology refers to a way for all people to participate in accounting. There is a database behind all systems. You can think of the database as a big ledger. Then who will keep this ledger becomes very important. Currently, whoever owns the system keeps the accounts. Tencent keeps the accounts of WeChat, and Alibaba keeps the accounts of Taobao. But now in the blockchain system, everyone in the system has the opportunity to participate in accounting. If there are any data changes within a certain period of time, everyone in the system can do accounting. The system will judge the person who has the fastest and best accounting during this period, write his recorded content into the ledger, and record this Within a period of time, the contents of the ledger are sent to all other people in the system for backup. In this way, everyone in the system has a complete ledger. In this way, we call it blockchain technology.
Blockchain technology has become the darling of the financial community in China and has become a hot topic. Domestic Puyin Group has launched Puyin, a tea-based digital currency.
Question 5: Explain in an easy-to-understand manner what blockchain is. Blockchain can be understood as a database system in a sense. The development of blockchain can be divided into 1.0 and 2.0
1.0 is represented by Bitcoin, and its main application is virtual currency or digital currency application. The blockchain at this time can only be used for simple digital currency transactions.
2.0 is represented by the now popular ethereum (Ethereum) and the upcoming hyperledger. The blockchain at this stage can not only meet the corresponding digital currency transactions, but also use smart contracts to customize currency or asset transactions. If we use the database analogy, the emergence of smart contracts can be understood as allowing users to define functions or stored procedures in the database and call and execute them.
Different from traditional databases, the blockchain introduces consensus mechanism, incentive mechanism, p2p (network), hash and other specific elements, making it open, decentralized and non-tamperable. characteristic.
Question 6: What is blockchain? Can anyone explain it in simple terms? Blockchain is the underlying technology of Bitcoin. It is like a ledger that records all transactions. It has decentralization. What is decentralization? For example, when you buy something on Taobao, you place an order and pay in Alipay, etc.After you receive the goods, Alipay will transfer the money to the seller. Alipay is the third party in that center. Without it, it means decentralization, just like buying things offline. If you pay with one hand and get the goods with the other hand, there is no third party.
The blockchain itself is a series of cryptographically related data blocks generated.
Look carefully to see if it looks like a ledger. The pieces one by one are blocks, and connected together they are the blockchain.
Many companies are developing this technology, including ours, and its prospects are incredible. For details, you can go to our official website and hope to adopt it, thank you
Question 7: What is blockchain technology? What is blockchain? How to explain the concept of blockchain? People in each industry have different understandings, and relevant explanations are gradually emerging due to more and more real-life applications. With the popularization of this blockchain technology, the related results are getting bigger and bigger. If we want to understand this technology, we must have an in-depth understanding of reality.
In the past six months, the concept of blockchain has gradually become popular in China, and a blockchain whirlwind has taken off in the financial circle. Blockchain has attracted the attention and favor of more and more people in the industry due to its unique technical advantages. Blockchain technology, which is decentralized (or multi-centered), highly transparent, cannot be tampered with, and has no single point of failure, is entering the field of vision of financial institutions and enterprises. It has at least been used in digital currency, payment exchange, registration and settlement, Digital assets, traceability and anti-counterfeiting, supply chain, Internet of Things and many other fields have moved from theoretical discussions to practical applications.
"Blockchain" was first introduced with "Bitcoin" released in early 2009. Blockchain has become the basic protocol and technical application for the launch, recording, and circulation of Bitcoin. Although Bitcoin has been controversial since its inception and cannot even be regarded as a "currency" by governments and monetary authorities, the blockchain technology used in Bitcoin has been recognized by governments, including governments and monetary authorities. extensive attention.
Why has blockchain become a rapidly heating up hot technology and topic?
The most important of these may be that the launch of Bitcoin based on blockchain technology has opened up a new relationship with traditional society ( The exploration and attempt of brand-new technologies and rule systems such as Internet user identity verification, wealth confirmation, transaction records, notarization and verification, which have little connection with offline) and are fully applied in the online world (online), provide people with the opportunity to adapt to the Internet society. Development provides alternative paths and unlimited imagination.
Judging from its application in Bitcoin, blockchain is a set of new network blocks (BLOCK, also called communities) formed by combining encryption technology with the Internet. Bitcoin configuration, netizen identity verification, and Bitcoin (value) confirmation formed by mining, Bitcoin transaction records, and extended encryption of Bitcoin cross-block flow (value transfer) (added block and transaction time identification, etc. factors) registration and verification, etc., block connection (Blockchain (i.e. blockchain), fully encrypted, mutually authenticated Internet protocol rules and accounting (Ledger) system. Precisely because Bitcoin is not a substitute for offline legal currency, but is issued and managed by non-legal currency authorities, mainly imitating the model of gold, and is completely new and decentralized protected and supported by basic Internet protocols and strict encryption technology. Internet currency (virtual currency) has thus formed a new set of currency rules and systems that are different from and not subject to real social laws, and can be bought, sold or exchanged with legal currency. It has been more than 8 years since Bitcoin was launched. There has been no record of funds or user information being stolen. Its security has been verified, and its efficiency and cost of fund settlement also have obvious advantages. This has made people's confidence in the blockchain technology used in Bitcoin continue to increase, and people have become more and more aware that although blockchain is a technology and protocol pioneered and applied by Bitcoin, the blockchain Chain is not the same as Bitcoin, and its application is by no means limited to Bitcoin. The application of blockchain can be decentralized or centralized; it can be a public chain model or a private chain model. Therefore, after Bitcoin, blockchain technology is also constantly developing and innovating, and constantly exploring new application fields, especially in the financial field.
The reason why blockchain is valued highly by more and more people is because the development and widespread application of the Internet have caused more and more economic exchanges and transaction activities to be conducted online, and the online world (or online world) society) is rapidly expanding, enriching and active, and online transactions must solve the efficiency and security protection issues of the parties' identity verification, value verification, transaction records, inspection and verification, etc., and require strict intermediaries and agreements (rules or constitutions). In this regard, traditional thinking and customary practices are to follow the development trajectory of the transfer of offline transactions to online and push the common rules and practices of the real (offline) society to the online (network) society. However, in practice, it is increasingly It is difficult to adapt to the needs of online transactions.
For example, for the identity verification of the parties, the natural choice is to use the information on the identity documents protected by the laws of various countries as the basis, and then add account or transaction passwords, as well as facial recognition, iris, fingerprints and other biometrics to conduct online transactions. Verification, but this method first makes the citizen identity information in the cross-border interconnected online world subject to the administrative jurisdiction of real society... >>
Question 8: Easy to understand Explain clearly what is blockchain. The English name of blockchain is Blockchain. Block literally means block, block, and chain means chain, chain. Therefore, together they are translated into blockchain.
1. Use cryptography technology to encrypt and decrypt so that records cannot be tampered with. Common blockchain encryption methods include hash algorithm, RSA algorithm, elliptic curve algorithm, etc.;
2. Huge amount of calculation is requiredIt is supported by a reasonable reward mechanism. Because every transaction must be recorded, Bitcoin’s blockchain has more than 60 gigabytes so far. Every new transaction requires confirmation of the information related to the trading account to ensure that the transaction is valid. The huge amount of calculation requires a computer with powerful computing power to complete.
In order to encourage the participation of powerful computing power, Bitcoin provides two rewards: one is to issue a certain number of Bitcoins to these computers every day; instead, all transfer fees are awarded to these computers. (The technical term for these computers is "mining machines", and the people who hold the mining machines are called "miners".)
Biying China is working hard on the digitization of assets and has launched the digital currency crowdfunding platform Biying China.
Question 9: What is the so-called "blockchain"? Blockchain itself is a tool called decentralization and trustlessness. For example, when you graduate from university, the current practice is to have a certificate recognized and issued by an authoritative agency as your certificate. This setting is more troublesome, because this is a piece of paper, and paper can be forged, so there will be various gaps. The issuing authority is also a person, and there will be various gaps in the middle. As long as it is related to people, whoever There are various possibilities related to media. The blockchain provides a great opportunity. As soon as you graduate, you will have a record on the blockchain. No one can change this record. This thing exists objectively. You, as a physical existence , and then as a data existence, the blockchain was born. In this case, anyone who wants to check where you graduated can easily solve the problem. This is similar to the big data often involved in social networking (WeChat) and payment platforms (Alipay, Yibao).
Question 10: What does blockchain mean? Regarding blockchain, I think you have already seen the concept on the Internet. Let me explain it based on my understanding!
First, let’s talk about its characteristics: 1. Openness and transparency 2. Decentralization 3. Anonymity 4. Information cannot be tampered with, eliminated 5. No trust cost
Blockchain is like a public ledger , everyone has the right to record and read, and everyone will jointly supervise to ensure its accuracy, and the recorded content will be permanently saved, and can only be added but not deleted! However, as the number of blocks continues to increase, costs will increase and efficiency will decrease. (I’m not sure whether technology can be used to make up for this. I hope someone who understands technology can point it out.)
Blockchain is divided into public chain, private chain, and alliance chain. Public chain: accessible to everyone, everyone has read and write permissions, completely open, transparent and decentralized. Private chain: Open to individuals or institutions, in which the owner of the private chain can set various permissions to make it partially centralized. Alliance chain: Open to specific organizations or groups, it is also "partially decentralized". According to the account book at the beginning, members can view and transact, but cannot record and confirm the account.Single, or requires permission from the alliance. (The latter two do not have cost and efficiency issues)
Regarding blockchain, countries have begun to recruit talents in this area. For this, you can search online for "Central Bank Recruiting Digital Currency R&D Personnel". In addition, you can increase your understanding of blockchain by understanding its existing applications. What we usually refer to generally refers to public chains. Currently, those used abroad include Bitcoin, Ethereum and other domestic blockchains. Chain
1. Open and transparent: Every piece of data is verified by everyone and can be viewed by everyone at any time.
2. Decentralization: For example, when we shop on Taobao, we conduct transactions through the intermediary Taobao, and blockchain allows both supply and demand parties to directly contact each other for direct transactions through blockchain technology.
3. Anonymity: No personal privacy information is required to complete transactions on the blockchain, only your unique alphanumeric signature is required.
4. Information cannot be tampered with or deleted: Once the data has been verified and recorded, no one has the authority to modify it, let alone delete it!
5. No trust cost: The trust crisis in reality will not appear in the blockchain. Transactions in the blockchain do not require you to trust the other party. Only when both of you have enough "digital assets" to trade can it be carried out, and Under the supervision of the entire network, transactions will not be broken. If you have no idea about the cost of trust, just think about how many intermediaries there are in your city, or just think about Jack Ma, and you will know how big the cost of trust is.
I am still learning more about blockchain. I am Li Ailin. If you have any questions, you can discuss and learn together!
II What happened to the blockchain recently?
There is a word recently.
It often appears on the Internet,
It’s amazing to see this word,
but I often don’t know what it means.
The word is called
"Blockchain"
Recently, "Blockchain" has been named publicly again.
What is "blockchain"?
From an academic perspective, blockchain is a new usage model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanisms, and encryption algorithms.
Blockchain is essentially a decentralized database.
Explain this.
Many people still don’t understand.
Hypothetical environment:
Methods to solve the blockchain problem:
If you use the whole family to keep accounts, the above problems will not exist, because you keep the accounts, your father keeps the accounts, and your mother keeps the accounts. They can all see the ledger, you can’t change it, and neither can your parents. So you can't help the dad who wants to buy cigarettes, nor can you help the greedy dad.
In other words, the blockchain
this distributed digital ledger
records everything that has happened
and the transactions are unanimously approved by the system.
Each block is a ledger.
It can not only record transaction information
but also has more functions.
Multi-functional "Blockchain"
Each block is like a hard drive, withAll information is saved and then encrypted using cryptography. This saved information cannot be tampered with.
Looks like it
Blockchain has some super technical properties.
Characteristics of blockchain
1. Exceptionally safe: Unlike centralized databases owned by companies or government agencies, blockchain is not controlled by any person or entity, and the data is completely replicated (distributed) across multiple computers superior. Unlike centralized databases, there is no single entry point for attackers, so data is more secure.
2. Non-tamperability: Once entered into the blockchain, no information can be changed, and even administrators cannot modify this information. Once something happens, it cannot be changed. This property is of great significance to the ever-changing and ever-changing online world in which humans live.
3. Accessibility: All nodes in the network can easily access information.
4. No third party: Because of the decentralization of the blockchain, it can facilitate peer-to-peer transactions. Therefore, whether it is a transaction or fund exchange, no third party approval is required. Blockchain itself is a platform.
What will the future development and usage scenarios of blockchain look like?
Watch more news.
More News
1. Digital Identity
Many people will encounter the dilemma of "proving that my mother is my mother" when applying for various certificates. With blockchain, there is no need to worry anymore.
Our original birth certificates, real estate certificates, marriage certificates, etc. It needs a central node for everyone to recognize. Once cross-border, contracts and certificates may become invalid due to the lack of a global central node.
The immutable nature of blockchain technology fundamentally changes this situation. Our birth certificates, real estate certificates, and marriage certificates can all be notarized on the blockchain and become things trusted by the whole world. Of course, it is also easy to prove "my mother is my mother".
2. Health care
To put it simply, it is to use the blockchain to establish a universal record library with timestamps, so as to achieve the purpose of extracting data information from different databases. For example, when you go to see a doctor, you can have repeated examinations without changing hospitals, and you don’t have to go back and forth for medical insurance reimbursement, which can save time and money.
3. Travel consumption
For example, we often use apps such as Ctrip and Meituan to find and place orders for hotels and other services, and each platform earns commissions from them. The use of blockchain is to remove middlemen and create a secure, decentralized way for service providers and customers to achieve direct connection and transactions.
4. More convenient transactions
Blockchain can make payments and transactions more efficient and convenient. The blockchain platform allows users to create smart contracts that become active when specific conditions are met, meaning that automatic payments can be released when both parties agree that their conditions are met.
5. Strictly control product quality.
If you buy an apple, with blockchain technology, you can know the entire process from production to distribution. There are government regulatory information, professional testing data, corporate quality inspection data, etc. Smart supply chains will make our daily food and commodities safer and give us more peace of mind.
6. Property rights protection
Related questions and answers: What does blockchain mean?
Blockchain is a new usage model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithms. Blockchain is an important concept of Bitcoin.
It is essentially a decentralized database, and as the underlying technology of Bitcoin, it is a series of data blocks generated using cryptographic methods. Each data block contains a batch of Bitcoin network transactions. The information is used to verify the validity of its information (anti-counterfeiting) and generate the next block.
Blockchain is closely related to people's production and life in the fields of public management, energy, hotel management, transportation, etc. However, the centralized nature of these fields also brings some problems, which can be transformed with blockchain.
The decentralized fully distributed DNS service can realize domain name query and resolution through point-to-point data transmission services between each other in the network, and can be used for certain important infrastructure operating systems and firmware without being tampered with. It is possible to monitor the status and initialization of software, detect bad tampering, and ensure that data transmitted by systems using IoT technology has not been tampered with.
The above content refers to the network-blockchain
Ⅲ What does this public blockchain mean in simple terms and what is its use?
Blockchain is a term in the field of information technology . In essence, it is a shared database, and the data or information stored in it has the characteristics of "unforgeable", "full traces left", "traceable", "open and transparent" and "collectively maintained". Based on these characteristics, blockchain technology has laid a solid foundation of "trust", created a reliable "cooperation" mechanism, and has broad application prospects. In recent years, more and more people regard blockchain technology as one of the most promising new technologies in the future. Right now, there is a lot of talk about how cryptocurrencies and blockchain will change the world economy. Although the future of cryptocurrencies is unpredictable, the unshakable status of blockchain may continue to lead the development of the industry in the future. In fact, blockchain has changed not only the world economy, but even the daily lives of ordinary people have been greatly changed by its impact. The emergence of blockchain technology itself is an innovative process. Anyone who understands blockchain technology should know that blockchain is a database that can collaborate on a large scale. It allows many different subjects to collaborate to complete a task without trusting each other. This is the essence of blockchain.
Since this year, there have been numerous cases about blockchain technology supporting the resumption of work and production of small and medium-sized enterprises.
Here we use the combination of China (Fujian) International Trade Single Window and Blockchain to illustrate
The protagonist! !
We quote the China (Fujian) International Trade Single Window
The third issue of "Case Analysis Service" for analysis
Quickly scroll down with your little hands
Get a lot of knowledge quickly~
IV What is blockchain?Popular explanation
What is blockchain in popular explanation
What is blockchain in popular explanation? Blockchain is a hot topic nowadays, and its development speed in China is getting faster and faster. , but many people still don’t know what exactly is blockchain? Now I will give you an easy-to-understand explanation of what blockchain is!
Popular explanation of what blockchain is 1Generally speaking, blockchain is a decentralized distributed ledger database. The advantage of this distributed ledger is that buyers and sellers can trade directly. There is no need for any intermediary, everyone has a backup, even if your copy is lost, it will not be affected.
Suppose you have a ledger at home, and your parents give you your salary and ask you to record it in the ledger. You misappropriated more than ten yuan privately because of your greed, and no one else knew about it. But the way to solve the problem with blockchain is to keep accounts with the whole family. Not only you are keeping accounts, but your father, mother, brother, sister, younger brother, sister, etc. are all keeping accounts. They can all see the general ledger, and you It cannot be changed, and neither can others.
Blockchain is a new application model of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm. Blockchain technology has been widely used in different industries. Such as product traceability, copyright protection and transactions, payment and settlement, Internet of Things, digital marketing, medical care, etc.
Popular explanation of what blockchain is 2Common questions in blockchain engineer interviews
What do you think the block in blockchain technology means?
The blockchain consists of information about all financial transactions. A block is nothing more than a list of records. When these lists are combined together, they are called a blockchain. For example, if an organization has 100 ledgers, their combination is called a blockchain, and a single ledger will be considered a single block.
Why is blockchain a trustworthy approach?
There are many reasons to trust blockchain. The first reason is that it is compatible with other business applications because it is open source. Secondly, it is secure because it was developed for online transactions, so the developers pay special attention to its data synchronization while keeping it safe. Because the type of business it holds is unrelated, it is easy to consider distinguishing chains when choosing.
How much do you know about blockchain?
This is a technology that was actually designed for Bitcoin and later heavily promoted for the multiple benefits of monitoring and recording all financial transactions on the network. This is a trusted method that is currently being used by many organizations. Since everything is secure and open source, it is easy to gain trust in the long run.
Utilizing blockchain in an organization, if there are specific technical requirements for that network?
There are no specific conditions for use. However, the network must be a peer-to-peer network under the relevant protocol. It literally just validates new blocks and helps organizations stay in sync without having to invest in third-party applications.
What is encryption? What is its role in blockchain?
Data security is always very important. Encryption is basically a way to help organizations keep their data secure. In this technique, data is encoded or altered to some extent by the sender before being sent to the network. Only the receiver can know how to decode it. This practice is very useful in blockchain because it increases the overall security and authenticity of the block and helps ensure that the block is secure.
What types of records can be saved on the blockchain? Are there any restrictions?
There are no restrictions on any type of records in the blockchain approach. Currently, many organizations around the world are using this approach, and the fact is that medical transaction records, organization-related events, administrative activities, transaction processing, identity management, document records are all common record types that can use blockchain. And record keeping is not limited to these applications..
What is double spending?
This is one of the main issues related to digital currencies. In practice, this is a condition of passing a digital certificate, since the card can be used multiple times through a digital file that is often easily cloned. It only leads to inflation and the organization has to bear huge losses. A major technical goal of blockchain is to eliminate this approach as much as possible.
Explain the importance of blind signatures and how they are useful?
It is actually a form of digital signature, an important part of cryptography, where all information is blinded until it is actually considered or signed. This is a proven method often considered in different privacy-related agreements between the author and the signatory. Digital currency design is one of the most common examples.
What is key sharing? Are there any benefits to blockchain technology?
As we all know, security issues in digital transactions are very important. Key sharing is a similar approach. In blockchain technology, this is a method of dividing keys or personal information into different units and sending them to network users. The original information can only be merged if the participant who distributed the key agrees to be merged with other participants. It can provide various security-related benefits in blockchain technology.
What organizations can use blockchain technology?
This method can be considered as commercial class without strict upper limit. In fact, almost all businesses are doing or online financial transactions that require them to successfully complete the implementation process. Large enterprises, financial institutions, private enterprises, government departments, and even defense agencies can easily trust this technology.
Blockchain pointsWhat is the difference between ledger and general ledger?
First of all, the main difference is that blockchain is a digital ledger that can be easily decentralized. This method is far less likely to go wrong than a regular ledger. Normal books are written by hand or by hand, blockchain does all the tasks automatically. You just need to configure it the right way and follow all the guidelines.
What is a soft fork?
Blocks in the ledger are included in a way that builds the longest chain, i.e. the chain with the greatest cumulative difficulty. A fork is a situation where there are two candidate blocks competing to form the longest blockchain, and two miners discover a working problem and fail to synchronize with each other within a short period of time. Causes network fragmentation because some nodes get blocks from miner #1 and others get blocks from miner #2. Forks are usually resolved in one block because the probability of this happening again becomes very low as the next block comes out so soon there is a new longest chain that will be considered primary.
What is IV blockchain
Chinese translated as blockchain technology, blockchain technology uses new encryption authentication technology and network-wide consensus mechanism to maintain a complete,
A distributed, non-tamperable, continuous ledger database where participants use a unified, reliable ledger system and a timestamp mechanism.
It is still in the conceptual stage in China, and its future development is unlimited.
VI What does currency circle mean?
The so-called currency circle is a naturally formed circle of digital currency players. The currency circle is not big, but the number of people is not small, and it is basically a niche among the crowd, but it is still a circle. There are not many people making money, and all kinds of money-making methods are quickly copied, such as ICO, speculation coins, mining, etc.
There are many ways to make money in the currency circle, the most important ones are currency speculation, ICO crowdfunding, brick-and-mortar, etc. The legal currency in the currency circle is legal tender, which is issued by the country and the government and is only guaranteed by government credit, such as RMB, US dollars, etc.
1. Currency token:
Token, usually translated as pass. Token is one of the important concepts in the blockchain. It is more commonly known as "token", but in the eyes of professional "chain circle" people, its more accurate translation is "pass", which represents the area. A proof of stake on the blockchain, not a currency.
The three elements of Token
The first is digital proof of rights and interests. The token must be a certificate of rights and interests in digital form, representing a right and a right. An inherent and inherent value;
The second is encryption. The authenticity, tamper resistance, privacy protection and other capabilities of the certificate are guaranteed by cryptography;
The third is the ability to be used in a It flows in the network and can be verified anytime and anywhere.
2. Opening a position in the currency circle:
Building a position in the currency circle is also called opening a position, which refers to a trader’s new purchase or sale of a certain amount of digital currency..
3. Coin Stud:
Coin Stud means investing all the principal.
4. Airdrop in the currency circle:
Airdrop is currently a very popular cryptocurrency marketing method. In order to provide potential investors and people who are passionate about cryptocurrency with information about the token, the token team will conduct frequent airdrops.
5. Lock-up in the currency circle:
Lock-up generally means that after investors buy and sell contracts, when the market trend is opposite to their own operations, they open positions opposite to their original positions. The new warehouse is also called locking, locking, or even euphemistically called butterflies flying together.
6. Coin Circle Candy:
Coin Circle Candy is the digital currency that various digital currencies are issued for free to users when they are first issued in the ICO. It is the issuer of the virtual currency project. A kind of momentum building and publicity in itself.
7. The currency circle breaks:
Break refers to falling below, and hair refers to the issuance price of digital currency. A currency circle break means that a certain digital currency falls below the issuance price.
8. Coin Circle Private Equity:
Coin Circle Private Equity is a way to invest in cryptocurrency projects, and it is also the best way for cryptocurrency project founders to raise funds for platform operations.
9. Views on currency circle K-line:
K-line chart (Candlestick Charts) is also called candle chart, Japanese line, Yin and Yang line, bar line, red and black line, etc. The commonly used saying is "K line". It is plotted as the opening, high, low and closing prices for each analysis period.
10. Trading in the currency circle:
Buying is to buy digital currency from an exchange with a low currency price, and then sell it to an exchange with a high price.
Ⅶ What exactly is blockchain and what are its uses
Recently, the word "blockchain" has appeared very frequently on the Internet. The word "blockchain" is very interesting. So what is "blockchain", how to explain "blockchain", and what kind of chain is "blockchain"?
If we want to know what “blockchain” is, we must first start with Satoshi Nakamoto.
In November 2008, Satoshi Nakamoto posted a research report on a secret cryptography review group, describing his new idea for electronic currency-Satoshi Nakamoto proposed : "I believe there is a currency that doesn't rely on credit, and I can't stop myself from thinking about it." Bitcoin was born.
Although we still don’t know who Satoshi Nakamoto is, we all know the famous Bitcoin and the recently popular word “blockchain”.
In professional terms, blockchain is a new application model of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm, etc.
The original English version of the Bitcoin White Paper [2] is not actuallyWhere the word blockchain appears, chain of blocks is used instead. In the earliest Chinese translation of the Bitcoin white paper [3], chain of blocks was translated into blockchain.
What does it mean in human terms? In layman's terms, blockchain is a decentralized distributed ledger database.
Decentralization means removing the original data center.
Here is an example of decentralization: Alibaba’s servers support Alibaba’s daily data operations, including the Double Eleven that just passed. We were able to smoothly carry out flash sales of goods at zero o’clock. Largely thanks to the support of Alibaba servers.
All data generated by Alibaba’s daily activities are recorded on the server. So what will happen if Alibaba’s server encounters an accident? (For example, Alibaba's server was hit by a meteorite, causing the server to be damaged)
After the server is paralyzed, Alibaba's data will naturally be unable to be restored in time, which will result in Alibaba being unable to maintain daily operations in the short term. operations.
However, after adopting blockchain technology, a piece of data generated by Alibaba due to daily business will not only be recorded on Alibaba’s servers, but also on various servers around the world such as the Internet and Google. In this way, even if Alibaba's servers encounter an accident, it will still not affect Alibaba's operation. The data generated by Alibaba's daily activities will still be recorded on various servers around the world. This is the advantage and benefit brought by blockchain technology.
In other words, Ali's data was only recorded in Ali's server, and Ali's server was the center. Now every server in the world is synchronously recording the business that Ali has done, and Ali's server is the center. It is no longer the only center, this step achieves decentralization. The behavior of servers around the world recording Alibaba data simultaneously is called distributed accounting.
Now that we know what blockchain means, what kind of boundaries can blockchain bring to our lives? What fields may blockchain be used in in the future?
1. Blockchain technology is applied in the medical and health field. For example, Xiao Zhang’s family has a history of hereditary red-green color blindness. Xiao Zhang once went to Hospital A and had his red-green color blindness checked. Now Xiao Zhang is in City B and went to Hospital B for treatment. Now Hospital B can directly treat him in his own hospital. Xiao Zhang’s previous medical treatment status was found in the database, so Hospital B no longer needs to conduct repeated examinations on Xiao Zhang. This greatly saves medical resources for the hospital and saves medical expenses for repeated examinations for Xiao Zhang.
2. Blockchain technology is applied in the field of food safety. Nowadays, everyone is paying attention to food safety, and blockchain technology is applied to the field of food safety to carry out food traceability.. First, we can label each vegetable and fruit with its own label, and then record the growth, maturity, pests and diseases of the vegetables and fruits in this label. The data in this tag can be simultaneously recorded in various data centers around the world through blockchain technology.
On the one hand, when people buy vegetables, they can directly check the growth status of the vegetables. On the other hand, when our country imports and exports vegetables, we can directly check the status of the imported and exported products. No more quarantine required.
ⅧWhat does the node in tp wallet mean?
The meaning of blockchain.
Blockchain nodes usually refer to computers in the blockchain network, which means that any computer connected to the blockchain network is called a node. For example, the Bitcoin network is a public chain. When a user runs a Bitcoin program on his or her Internet-connected computer, the computer becomes a node in the Bitcoin blockchain network.
Operating a node can be an ordinary wallet user, a miner or a multi-person collaboration. Different blockchains have different numbers and requirements for nodes. Usually, the node first needs to have a certain amount of storage space to ensure good enough performance to avoid clogging as soon as it runs. Then the device needs to be connected to the network and can be operated using mining machines, servers, computers, etc. to access the blockchain. What tools should be used specifically? Depends on node requirements.
