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⑴ What does blockchain technology mean?

Blockchain technology uses a blockchain data structure to verify and store data, and uses a distributed node consensus algorithm to generate and A new distributed infrastructure and computing paradigm that updates data, uses cryptography to ensure the security of data transmission and access, and uses smart contracts composed of automated script codes to program and operate data. It is strung together by blockchain technology. The connected distributed ledger allows two parties to effectively record transactions and permanently verify this transaction.
Extended information
It is not difficult to understand the basic principles of blockchain. Basic concepts include:
Transaction: an operation that results in a change in the ledger state, such as adding a record;
Block: records transactions and status results that occur within a period of time, and is an update to the current A consensus on the ledger state;
Chain: It is composed of blocks connected in sequence and is a log record of the entire state change.
If the blockchain is used as a state machine, each transaction is an attempt to change the state, and the block generated by each consensus is the participant's confirmation of the results of the state change caused by all transaction contents in the block.
Explained in layman's terms: If we assume that the database is a ledger, reading and writing the database can be regarded as an accounting behavior. The principle of blockchain technology is to find out the fastest and best accounting within a period of time. This person will keep accounts, and then send this page of information to everyone else in the entire system.
This is equivalent to changing all the records in the database and sending them to every other node in the entire network, so blockchain technology is also called a distributed ledger.
Currently, there are two main models of blockchain applications:
1) Native blockchain applications: directly based on decentralized blockchain technology, realizing applications such as value transfer and transactions, such as digital Currency;
2) "Blockchain+" model: combine traditional scenarios with the underlying protocol of the blockchain to improve efficiency and reduce costs. It is expected that the application of blockchain in various industries will be dominated by the second model.
Blockchain has five core attributes, namely: transaction attributes (value attributes), certificate attributes, trust attributes, intelligence attributes, and traceability attributes. The above core attributes are combined with the needs of the industry to solve the industry's pain points and become a business model for blockchain applications in various industries.
As a basic technology, blockchain has great application value in many industries with distributed processing, peer-to-peer transactions, and rapid establishment of trust relationships. Its core is to solve the problem of credit and realize Point-to-point delivery of value. Therefore, it is considered to be the cornerstone of the future value Internet.
The core of the blockchain business model is to use the innovative attributes introduced by the blockchain and combine it with traditional industry applications to realize the reconstruction of business logic in order to create new application scenarios, or improve efficiency and reduce costs.

⑵ The technical characteristics of blockchain includeWhat

What are the characteristics of blockchain? Let us take a look at it together:
1. Decentralization
Blockchain technology does not rely on additional third-party management agencies or hardware facilities. There is no central control, except for the self-contained blockchain. In itself, through distributed computing and storage, each node realizes information self-verification, transmission and management. This is also the most prominent and essential feature of blockchain.
2. Openness
The foundation of blockchain technology is open source. In addition to the private information of the parties to the transaction being encrypted, the data of the blockchain will be open to everyone, and anyone can use the public interface When querying blockchain data and developing related applications, it can be said that the entire system information is highly transparent.
3. Independence
Based on consensus specifications and protocols, the entire blockchain system does not rely on other third parties. All nodes can automatically and securely verify and exchange data within the system without any need for any human intervention.
4. Security
As long as you cannot control 51% of all data nodes, you cannot manipulate and modify network data at will, which makes the blockchain itself much safer and avoids subjective and artificial data changes.
5. Anonymity
Unless there are legal requirements, technically speaking, the identity information of each block node does not need to be disclosed or verified, and the information transfer can be carried out directly and anonymously.
The above is the editor’s sharing, I hope it can help everyone.

⑶ Advantages of blockchain technology

1. Decentralization

Due to the use of distributed computing and storage, there is no center Based on the hardware or management mechanism, the rights and obligations of any node are equal, and the data blocks in the system are jointly maintained by nodes with maintenance functions in the entire system.

2. Openness

The system is open. In addition to the private information of the transaction parties being encrypted, the blockchain data is open to everyone and anyone can The interface queries blockchain data and develops related applications, so the entire system information is highly transparent.

3. Autonomy

The blockchain adopts consensus-based specifications and protocols (such as a set of open and transparent algorithms) to enable all nodes in the entire system to trustlessly The free and safe exchange of data in the environment changes trust in "people" to trust in machines, and any human intervention has no effect.

4. Anonymity

Since the exchange between nodes follows a fixed algorithm, the data interaction does not require trust (the program rules in the blockchain will judge whether the activity is valid by itself) ), so the counterparty does not need to disclose its identity to make the other party trust itself, which is very helpful for the accumulation of credit.

Outstanding advantages:

Information cannot be tampered

Once the information is verified and added to the blockchain, it will be stored permanently unless it can be controlled at the same time More than 51% of the nodes in the system,Otherwise, modifications to the database on a single node are invalid, so the data stability and reliability of the blockchain are extremely high.

(3) How to evaluate blockchain technology Extended reading:

Blockchain originated from Bitcoin, which marked the starting point of the last financial crisis. Two weeks after the collapse of Mann Brothers, on November 1, 2008, a person claiming to be Satoshi Nakamoto published the article "Bitcoin: A Peer-to-Peer Electronic Cash System", explaining the encryption technology based on P2P network technology. Technology, timestamp technology, blockchain technology, etc. are the architectural concepts of electronic cash systems, which marks the birth of Bitcoin.

Two months later, the theory came into practice. On January 3, 2009, the first Bitcoin genesis block with serial number 0 was born. A few days later, block number 1 appeared on January 9, 2009, and was connected to the genesis block number 0 to form a chain, marking the birth of the blockchain.

In recent years, the world's attitude towards Bitcoin has been ups and downs, but blockchain technology, one of the underlying technologies of Bitcoin, has received increasing attention. In the formation process of Bitcoin, blocks are storage units one by one, recording all communication information of each block node within a certain period of time.

The links between each block are realized through random hashing (also called hash algorithm). The latter block contains the hash value of the previous block. With the expansion of information exchange, a Blocks are continued one after another, and the result is called a blockchain [3].

⑷ How to define blockchain and what are the application scenarios of blockchain

Now Many people think that blockchain is a universal technology that can do anything, which somewhat mythologizes blockchain technology!
On the definition of blockchain technology, American scholar Melanie Swann in her book "Blockchain: New Economic Blueprint and Introduction" defines blockchain technology as an open, transparent, and decentralized database.

Definition of blockchain: narrow vs. broad

As for the application scenarios of blockchain technology, it is natural to combine the characteristics of blockchain that are different from other technical systems.

The characteristics of blockchain technology include: < /p>

Blockchain is a database storage system that is distributed around the world and can operate collaboratively. It is different from traditional database operations. ——Reading and writing permissions are in the hands of a company or a centralized authority (centralized characteristics). Blockchain believes that anyone with the ability to set up a server can participate. Nuggets from all over the world have deployed themselves locally server and connect to the blockchain network to become a node in this distributed database storage system; once joined, the node enjoys exactly the same rights and obligations as all other nodes (decentralized and distributed characteristics).

At the same time, those who provide services on the blockchain can perform read and write operations on any node in the system. In the end, all nodes around the world will complete the process again and again according to a certain mechanism. Synchronize in sequence to achieve complete consistency of data in all nodes in the blockchain network.

At the beginning of this year, the term blockchain began to enter everyone’s lives. From national leaders to aunts who dance square dances, everyone knows this term. This term is widely known by Bit Brought by coins.

As we all know, the first few dozen bitcoins could only be exchanged for one pizza. At its peak, it was worth more than 20,000 US dollars, which has skyrocketed by more than a thousand times. This has also benefited a large number of wealthy people. Currently, there are blockchain The virtual currency generated by technology is gradually entering everyone's life, and many people have joined the ranks of currency speculation. I often hear people say that if you buy the right currency a hundred times, a bicycle will become a sports car, and one coin will turn a young model. You can imagine how many of them are involved. Attractive.

Since 2008, various games applying blockchain technology have also become popular, such as development games (Network Letts Dog, 360 Block Cat), mining games (NetEase Planet, Virtual Earth, Gongxinbao), these are attracting everyone to join in the name of blockchain, and of course there are some that are really reliable, which requires everyone to identify them carefully.

The three words "blockchain" were completely ignited during the Spring Festival that just passed, and the limelight overshadowed everything else. Some people said that this is the arrival of a new era, and the past has become classic, and others To say that everything is hype is ultimately a bubble.

In fact, blockchain technology is not a new concept. It has been applied to many industries, such as electronic signatures, as early as the past two years. Recently, the third-party electronic signature platform eShanbao revealed the latest progress of blockchain applications to NewSeed.

Currently, blockchain technology is mainly used in e-signing products for certificate deposit and certificate issuance. The application scenarios include copyright protection and online signing. , web page forensics, phone recording, email storage of evidence, etc.

Take the rights protection of online works as an example. Since online rights protection generally adopts the method of collecting evidence after the fact, real-time confirmation of rights is not carried out in the process of evidence generation, so the entire confirmation process is difficult. The copyright process is time-consuming, difficult and costly to obtain evidence, and extremely difficult to prove and trace the source. It cannot meet the characteristics of rapid dissemination and large quantity of online works.

eShanbao's new intellectual property protection solution based on timestamp + blockchain starts from the user's real-name authentication and solidifies the information generated in the process in real time. Electronic data, and through the time source service synchronized with the National Time Service Center, online works are stamped with legally valid timestamps to prove that electronic files have not been tampered with in a certain period of time. And blockchain technologyThe technology can establish point-to-point trust in the network, ensuring that all blockchain nodes can record complete copyright confirmation and transaction records, and can trace the source, truly realizing anti-repudiation and anti-tampering, and realizing a distributed trust foundation. facility.

Founder and CEO Jin Hongzhou believes that the application of decentralized blockchain technology has greatly improved the efficiency of data storage and certification, and The credibility of the identity of the parties reduces the cost of trust, but it cannot replace the original centralized public key encryption technology. The two should complement each other. Through the combination of the two, it can provide users with real-time and reliable Confirmation plan.

Next, e-Shanbao will also focus on building a smart contract platform based on blockchain technology. Jin Hongzhou said that data storage, Issuing certificates is only a relatively superficial application based on blockchain technology. It is the first step to implement blockchain technology, and the realization of real smart contracts is the second step. "Smart contracts cannot simply be understood as electronic contracts. They refer to a process, from the conclusion of the contract to the confirmation to the final execution." Jin Hongzhou explained.

Through the following limited cases, I hope everyone can understand the actual performance of blockchain technology, thereby stimulating interest in such solutions.

1. Administrative Services

Over the centuries, the roles and responsibilities of public administration have not changed significantly – or rather, what has changed dramatically is actually the scale of the data and the specific ways in which public agencies handle it. Although various digital technologies already exist to help collect and process data, issues such as anonymization, portability, and the immutability of large amounts of data remain unresolved.

Sasha Ivanov, founder, entrepreneur and CEO of Waves Platform and Vostok projects, said, "What the public administration currently lacks is a more convenient user experience (UX) for data use. To improve the user experience , we should introduce some kind of layer to it that acts as a trusted public environment that is transparent and can store data anonymously and immutably."

Governments are working on this by launching the U.S. Federal agency and enterprise-level initiatives such as the Federal Blockchain Initiative are gradually confronting the existence of such problems. The United States held its first federal government blockchain forum in July 2017, and the U.S. General Services Administration currently has more than 200 related use case repositories. Ivanov explained, “Distributed systems can really help us build such a reliable environment, improve our big data work, and even integrate all emerging technologies – including artificial intelligence and the Internet of Things. In fact, , whenever we face any kind of technology, it always embodies the sum of other technologies."

Now, the system supported by blockchain can actually work - this view has been unanimously recognized by all experts and has become the most important theoretical basis. In other words, what we need to do next is create more production-ready solutions.

2. Payment services

The government needs to process transactions, many of which involve the exchange of funds with citizens. Blockchain technology has huge potential application value in reducing the cost of fund transfers - including using new blockchain-based cryptocurrencies as intermediate transaction carriers, or using blockchain as a means of fund transfer, etc. Once a perfect solution is discovered, the business opportunities will be endless - especially for those who need to conduct frequent cross-border or Internet transactions.

The Jasper project was developed by the Bank of Canada to help it further think about how central banks and other financial institutions should implement payment operations between different banks based on distributed ledgers. The Bank of Canada has also developed its own digital currency variant, “CAD Coin,” to test the feasibility of using a national currency on top of the blockchain.

This project brings to an interesting conclusion that we should say no to proof-of-work public chain systems. In a paper titled "Project Jasper: Is a Distributed Batch Payment System Feasible?" the author observed that "Proof-of-work systems are not suitable for such large transaction processing systems because they assume that all transactions in the system are There is a need for openness and observability to a certain extent.”

3. Digitization and intellectual property

Governments are responsible for maintaining copyright records and databases. These records prove ownership of intellectual property. A blockchain-based system would allow artists, performers and writers of all kinds to time-stamp their works and theoretically detect copyright infringements and even keep a permanent record of their rights. In fact, many governments have already taken important exploratory steps in this direction.

Iran recently announced that it will deploy this technology. "Iran Financial Tribune" quoted Morteza Mousavian as saying that "the Digital Media Department of the Ministry of Culture has reached an agreement with a blockchain company to jointly design a system that can be used to protect online copyrights." He also added that "the relevant procedures will It will soon be released to users in an easy-to-use format."

This work is still in the early exploratory stages, but it offers enterprise customers the possibility of preserving records through replication technology. From a theoretical level, companies can use blockchain solutions to conduct financial accounting and discover errors in real time.

4. Welfare distribution

The government has the responsibility to create a level playing field for citizens. Citizens who are chronically poor or economically disadvantaged certainly need government support and assistance to ensure that they are able to sustain themselves and obtain income.The ability to continuously develop. However, welfare distribution is neither simple nor often straightforward. Problems such as corruption and impersonation have been wreaking havoc on various distribution channels within government schemes.

In China, the National Council of Social Security Fund is conducting early research on how to use blockchain technology to improve the delivery of national benefits to citizens. At the same time, India is also taking action. Andhra Pradesh and Telangana are already using blockchain to support their civilian resource supply systems.

It is said that many companies, including Microsoft, are also considering using the same technology. These solutions, which will touch individual employees and functional roles, are expected to gradually appear in small businesses in the near future.

5. Bidding activities

In order to build public infrastructure or provide related services, the government hopes to achieve economies of scale and competitive gains through bidding as much as possible. However, the bidding process is often not fair or transparent. Public procurement has long been a major scene of rampant corruption around the world. Transparency International noted that “many governments will award project contracts to a certain supplier in the absence of fair competition. This allows companies with greater political resources to improperly win over competitors; or companies in the same industry Bids will be negotiated in advance between companies, ensuring that each company gets a share of the tender. This will significantly increase the cost of delivering services to the public - we have found that corruption issues can increase project costs by 50%."

So, how can blockchain technology solve the bidding problem? According to Ivanov, “Unlike decentralized centralized systems, independent ledgers powered by blockchain will be able to improve bidding or anything else that needs to be tracked. Transparency of financial processes. The intervention of blockchain technology will help track the use of funds and ensure that they are paid out as expected and within the allowed time."

Currently, Japan’s internal affairs and The Ministry of Communications has announced a blockchain-based bidding system, which means that in industries with serious collusion problems, small and medium-sized enterprises are expected to usher in a more transparent bidding method and brighter development prospects.

Although quite a few of the cases mentioned previously are far from finalized, they do provide many possibilities for companies and governments. Of course, the key lies in implementation; and we should also look at all this with optimism, that is, although blockchain technology is often misunderstood, it is and will eventually find a direction in which it can exert its own energy!

< p> In layman's terms, the blockchain is like a dozen beacon towers on the Great Wall. If an enemy comes at one place, they will send out smoke. The other beacon towers will know about it and enter a defensive state together. In technical language, it is a distributed ledger. Each node keeps accounts separately. The failure of one or two nodes will not affect the entire network.

How is this distributed network different from the distributed servers of Google Network? Google Network's distributed servers still belong to Google Network and are controlled by their central scheduling algorithm. The distributed nodes in the blockchain do not know each other and have no legal affiliation. If you want to go offline and shut down, that's fine. But because of the currency rewards, there will always be someone who will turn on the machine as a new node to support the network.

After the popular and technical explanation, I hope you understand. So the first application scenario is finance. I put my money in Alipay. If Alipay doesn't recognize it one day, there's nothing you can do. But on the blockchain, it is useless if one node does not acknowledge it, because other nodes still have my records. The second is the contract. Nowadays, contracts are made on paper and are easy to be faked. But if they are put on the blockchain, they cannot be faked.

There are more application scenarios. It is recommended to check the top 100 digital Huobi online to understand the corresponding projects behind them and become a blockchain expert. .

Blockchain technology was first used in Bitcoin. Blockchain provides a reliable and trustworthy means of organizing data for cross-subject business scenarios. JD.com is essentially a supply chain company, and blockchain technology will be first used in many scenarios of the supply chain.

Blockchain is a decentralized technology. Blockchain can be applied to all products currently covered by the Internet.

The most popular application industry at present is the financial industry.

An application that has been implemented is product traceability. Alibaba and JD.com are already using blockchain technology to fully trace the origin of some of the products they sell. Consumers can trace the origin of the purchased products. There are also many blockchain applications in the digital advertising industry. Since digital advertising traffic fraud causes losses of tens of billions of dollars every year, there are already blockchain application projects based on digital advertising, such as DCAD, which is based on blockchain. The digital advertising application of blockchain technology mainly solves the problem of traffic fraud

In the future, as the application of blockchain technology becomes more mature, it will be applied in many industries, creating a new ecosystem based on technological trust. Mode

The characteristics of blockchain are distributed accounting and decentralization, but the ultimate goal is to make people get along more equally. Technology is meaningful only when it serves human values, and technology that meets human value needs will develop. Therefore, blockchain is in line with human pursuit of freedom and equality, so its trend to become mainstream is unstoppable.

Currently, there are many blockchain gimmicks, which are basically used to issue coins. The newly launched ono is a decentralized, free and global social platform. Due to decentralization, your chat communication information is peer-to-peer and cannot be viewed by others. In other words, one of yourYour words and deeds are no longer recorded and reviewed at any time like they are now on WeChat, QQ, and Facebook, freeing you from the trouble of surveillance.

In fact, blockchain technology can be used in any field. Information that previously required third-party confirmation can be completed online and confirmed at multiple nodes, making it difficult (almost impossible) to delete.

At present, blockchain is still in its infancy, and the technology is not mature enough, but it is also a better time to enter.

What is blockchain

If we use non-technical terms to explain blockchain, blockchain is a place where data is stored. However, the data stored in the blockchain is safe and reliable and does not need to be managed by anyone, so In the Internet, a place where data and information are exploding, having such a place would be like a magical treasure.

What can the blockchain do?

If you ask what the blockchain can do, it is better to say what applications require the use of the blockchain. As mentioned earlier, blockchain is a safe place, so wherever data needs to be protected securely on the Internet, blockchain technology needs to be used. For example:

Because the use of blockchain technology can better protect the data of policyholders, in today’s Internet, data is value and wealth, so value protection and value transmission are the future development directions of the Internet. And blockchain technology can really do just that.

If there are any deficiencies, you are welcome to comment and correct me.

In a narrow sense, blockchain is a chained data structure that combines data blocks in a sequential manner in chronological order, and is cryptographically guaranteed to be non-tamperable and non-tamperable. Fake distributed ledger.

The two parties involved in the transaction do not need to know who the other party is, nor do they need a third party for trust endorsement. They only need to trust a common algorithm to establish mutual trust and conduct direct transactions.

Its characteristics are trustlessness and decentralization. The destruction of each node's ledger has no impact on the entire blockchain. The blockchain runs point-to-point payments without a center that may cheat, and the security is greatly improved. Improved, the entire transaction network has changed from a star structure to a point-to-point P2P structure.

In the future, blockchain will be used in many fields and will have a great impact on human life. . It can be widely used in fields ranging from digital currency to securities and financial contracts, medical care, games, artificial intelligence, smart contracts, Internet of Things, e-commerce, file storage and other fields.

1. Cloud storage

This is the statistics of current cloud storage on the Internet. In terms of volume, Google has the largest volume, which is 8,000PB. So what if we share the idle data on the Internet?

Starlight Cloud builds blockchain through Starlight ChainData computing and storage lake, the total storage capacity in the future is targeted to be 15,000P (approximately 15.72864 billion G). This will be more than 10 times that of Alibaba Cloud's 1500PB! It is also more than four times the size of the Taizhou Storage Center, the largest storage lake in the world after expansion.

2. Medical aspects

Using blockchain technology to save personal medical records also retains personal medical historical data, which can be used when seeing a doctor or planning for your own health in the future. Historical data can be called directly. These data are highly private, and the use of blockchain technology also helps protect patient privacy.

⑸ What is blockchain and how to simply understand blockchain technology

What is blockchain

Block Chain is a new technology that uses point-to-point transmission and encryption algorithms. There are countless points in the blockchain, each point represents a user. When transactions occur between points, the transaction records will be directly uploaded to the block. The data in the blocks are linked in chronological order to form a blockchain.

1. Blockchain is also called a distributed ledger. The ledger records the transaction records of all nodes. Each node needs to maintain the development of the blockchain, supervise whether the transactions are legal, and can also work together to Transaction testimony.

2. Encryption technology. The transaction information in the blockchain is public, but the personal information has been encrypted. There is no need to worry about the leakage of personal information. Only with the authorization of the individual can the other party Personal information is queried and the security of personal information is guaranteed.

3. Consensus mechanism. Every node in the blockchain trusts each other. Every user can trade with confidence because the data cannot be tampered with and every transaction must be legal and will not There is a possibility of fraud.

4. In scenarios where smart contracts and blockchain technology are applied, intelligent matching can be used. For example, insurance claims can be automatically settled.

How to simply understand blockchain technology

Blockchain technology can be understood in this way. Xiaohei and Xiaobai are both nodes in the blockchain. Borrowing 1,000 yuan is a transaction, and the data will be stored in the block. At this time, Xiaobai broadcasts to everyone that Xiaohei borrowed 1,000 yuan from him, and Xiaohei also broadcasts that he borrowed money from Xiaobai. He borrowed 1,000 yuan from Xiaobai. Everyone heard the news. On the repayment day, Xiaohei said that he had not borrowed 1,000 yuan from Xiaobai. At this time, everyone came out to testify to Xiaobai that Xiaohei had indeed borrowed money. 1,000 yuan.

In the above example, Xiao Hei and Xiao Bai are equivalent to the two nodes of the blockchain. Borrowing money is a transaction. As long as the transaction is made, transaction data will be generated and uploaded directly to the block. The data in the block is public. Not only can you see it, but everyone in the blockchain can see it. This ensures that Xiaohei will not breach the contract and say that he did not borrow money, and everyone in the block will monitor it.Du Xiaohei paid back the money to ensure the legality of the transaction and mutual trust between each node.

⑹ What are the characteristics of blockchain technology

The four major characteristics of blockchain technology include: decentralization; trustlessness; scalability; anonymity. Decentralization: Due to the use of distributed computing and storage, there is no centralized hardware or management organization in the blockchain system. Therefore, the rights and obligations of any node are equal, and the data blocks in the system are maintained by the entire system. nodes to jointly maintain. Openness: The system is open. In addition to the private information of the transaction parties being encrypted, the blockchain data is open to everyone. Anyone can query the blockchain data and develop related applications through the public interface. Therefore, the entire System information is highly transparent. Autonomy: The blockchain adopts consensus-based specifications and protocols (such as a set of open and transparent algorithms) to enable all nodes in the entire system to exchange data freely and securely in a trustless environment, so that trust in "people" is exchanged. It has become a trust in the machine, and no human intervention will work. Information cannot be tampered with: Once the information is verified and added to the blockchain, it will be stored permanently. Unless more than 51% of the nodes in the system can be controlled at the same time, modifications to the database on a single node will be invalid, so the area The data stability and reliability of blockchain are extremely high. Anonymity: Since the exchanges between nodes follow a fixed algorithm, the data interaction does not require trust (the program rules in the blockchain will judge whether the activity is valid by itself), so the counterparty does not need to reveal its identity to the other party. Generating trust is very helpful for the accumulation of credit. Reliability: The data on the blockchain saves multiple copies, and the failure of any node will not affect the reliability of the data. The consensus mechanism makes modifying large numbers of blocks extremely costly and almost impossible. Destroying data is not in the self-interest of important participants. This practical design enhances the reliability of data on the blockchain and global circulation: blockchain assets are first based on the Internet. As long as there is the Internet, blockchain assets can be circulated. The Internet here can be the World Wide Web or various local area networks, so blockchain assets are circulated globally. As long as there is the Internet, blockchain assets can be transferred. Compared with centralized methods, the transfer fees for global circulation of blockchain assets are very low. For example, the early transfer fee for Bitcoin was 0.0001 BTC. Compared with traditional transfers, Generally speaking, blockchain assets arrive very quickly. It usually takes a few minutes to an hour to arrive.

⑺ What is blockchain technology

Blockchain technology is a decentralized distributed database technology that can achieve data security, transparency, non-tampering and other characteristics . It is composed of many data blocks. Each data block contains the current timestamp and the hash value of the previous data block. Data storage and management are achieved by continuously adding data blocks.
The core idea of ​​blockchain technology is decentralization, without central node controlIt is a decentralized network composed of many nodes to control the storage and circulation of data. In this kind of network, every node has the right to participate in the verification and storage of data. Any modification of data requires the consent of the majority of nodes in the network, which makes the blockchain technology non-tamperable and sensitive to inspection. Features such as centralization and transparency can ensure the security and credibility of data.
Blockchain technology can be applied to many fields, such as finance, Internet of Things, supply chain management, etc.

⑻ How to learn blockchain technology_How to understand blockchain technology

1. Technical language

Python and Go are two languages ​​​​that are recruited by many companies All mentioned technical languages. Need to prioritize learning. Moreover, these two languages ​​​​also have great applications in the direction of sliding technology outside of the blockchain. For example, Go is used in the background construction of large-scale concurrent systems, and Python is used in the construction of artificial intelligence systems. So learning these two languages ​​is a priority.

2. Technical framework

Master one or more of Bitcoin, ETH and Hyperledger. Needless to say about BTC, the bottom layer is written in C. A large number of currency projects, such as Litecoin, Dash, Monero, zcash, etc., all use Bitcoin technology for secondary development.

ETH is the representative of blockchain 2.0, and various application Dapps can be built on the ETH network. Nowadays, a large number of application blockchain projects are developed using the ETH platform.

Hyperledgerfabric is a blockchain development platform strongly promoted by IBM. It is mainly used for the development of alliance chains. It is currently the most popular alliance chain development platform.

3. Algorithm

POW (Proof of Work Algorithm), POS (Proof of Stake Algorithm), PBFT (Byzantine Fault Tolerance Algorithm), etc. are all important in the cryptography part of the blockchain Composition, a full understanding of these algorithms will help you have a better understanding of the cryptography part when participating in the underlying development of blockchain projects.

(8) How to evaluate blockchain technology Extended reading:

Blockchain technology is a distributed accounting technology, and its characteristic is decentralization , open and transparent, allowing everyone to participate in the establishment of the database, and each created data cannot be tampered with. With everyone participating, the problem of trust between strangers is solved.

Blockchain technology has emerged. It is an accounting technology that involves the participation of all people. The transaction information and data between AB are published to the public and cannot be tampered with. Everyone knows this. happens, then there is no need for any authoritative third-party C, or everyone in the system plays the role of C. This is also called decentralization.