区块链用图片解释是什么,区块链的图

区块链，这个技术最近受到了越来越多的关注，也被越来越多的人认识。那么，区块链到底是什么呢？用图片来解释，就是一条由很多区块组成的链条，每一个区块都有自己的信息，这些信息都是加密存储的，每一个区块都会记录上一个区块的信息，从而构成一条安全的、不可篡改的链条。

相关的关键词有：去中心化，智能合约，共识机制。

去中心化是指用户之间的交互和记录不再需要一个中心化的机构来管理，而是由网络中的各个节点来完成，这样就形成了一个去中心化的网络。去中心化的网络可以提供更高的安全性和可靠性，因为没有中心化的机构可以控制或篡改数据，也不会出现数据丢失的情况。而区块链技术正是利用去中心化的网络，将数据存储在网络中的各个节点上，从而实现安全可靠的数据记录和管理。

智能合约是指基于区块链技术的一种具有自动执行功能的合约。智能合约可以在区块链网络上运行，可以实现自动执行，不需要人为干预就能完成合约达成的目标，比如自动执行转账、自动执行订单等。智能合约可以保证双方的权益，因为它是在区块链网络上运行，不受任何人的控制，所以不会出现被恶意篡改的情况。

共识机制是指在区块链网络中，所有节点之间协商一致的机制。在区块链网络中，每一个节点都可以接收和发送交易，并对交易进行验证，这就需要所有节点之间进行协商，以确保数据的准确性和完整性。共识机制就是解决这个问题的一种机制，它可以让所有节点之间达成一致，从而确保数据的安全性和可靠性。

以上就是区块链用图片解释以及关键词去中心化、智能合约、共识机制的介绍。区块链技术可以带来安全可靠的数据记录和管理，以及更高效的交易方式，可以为我们的日常生活带来更多的便利。

⑴ Comic illustration: What is blockchain

Comic illustration: What is blockchain

What is blockchain?
Blockchain, English Blockchain, is essentially a decentralized distributed database. Anyone can become a node of this huge network as long as they set up their own server and connect to the blockchain network.
Since the blockchain is essentially a database, what exactly is stored in it? Let’s take a look at the basic unit of blockchain: Block.
A block is divided into two parts:
1. Block header
The block header stores the header information of the block, including the hash value (PreHash) of the previous block. The hash value of the block body (Hash), the timestamp (TimeStamp), etc.
2. Block body
The block body stores the detailed data (Data) of this block. This data contains several rows of records, which can be transaction information or some other information.
What does the hash value just mentioned mean?
Everyone must have heard of MD5. MD5 is a typical hash algorithm that can convert a string of plaintext of any length into a string of fixed length (128 bits). This string is the hash value.
In our blockchain, a more complex hash algorithm called SHA256 is used. After a series of complex calculations, the latest data information (such as transaction records) will eventually be converted into a 256-bit hash value string through this hash algorithm, which is the Hash in the block header. The format is as follows:

Blocks and Hash have a one-to-one correspondence, and Hash can be regarded as the unique identifier of the block.
How are different blocks related to each other? Rely on Hash and PreHash to associate. The PreHash value of each block is equal to the Hash value of the previous block.
Why do we need to calculate the hash value of the block?
Since the blockchain is a chain structure, there must be a head node (the first block) and a tail node (the last block) of the chain. Once someone calculates the hash value of the latest data in the blockchain, which is equivalent to packaging the latest transaction records, a new block will be created and connected to the end of the blockchain.
The Hash of the new block header is the hash value just calculated, and the PreHash is equal to the Hash of the previous block. The data in the block body stores the transaction records before packaging, and this part of the data information has become unmodifiable.
This process of calculating Hash values ​​and creating new blocks is called mining.
The server used for massive calculations is called a mining machine.
The workers who operate calculations are called miners.
Compute HashWhat’s so hard about it? Let’s give the most superficial explanation. The formula for calculating the hash value is as follows:
Hash = SHA-256 (Hash of the last block + basic information of the new block + transaction record information + random number)
Among them, the transaction record information is also a series of hash values, and its calculation involves a data structure Merkle Tree. Interested friends can check the relevant information, we will not introduce it for now.
The key computational difficulty here lies in the generation of random numbers. In order to increase the difficulty of Hash calculation, the wretched inventor of the blockchain requires that the first 72 bits of the Hash result must be 0. This probability is too small.
Since (the Hash of the last block + the basic information of the new block + the transaction record information) is fixed, whether the Hash that meets the requirements can be obtained depends entirely on the value of the random number. Miners must go through massive calculations and repeatedly generate random numbers in a general attempt to "get lucky" before they can get the correct Hash and successfully mine.
At the same time, the block header also contains a dynamic difficulty coefficient. When the world's hardware computing power becomes faster and faster, the difficulty coefficient of the blockchain will also increase, making the entire network capable of completing the task every 10 minutes on average. A new block is generated.
Friends, do you understand how difficult mining is? It should be added that different blockchain applications are different in details. The mining rules described here take Bitcoin as an example.
Applications of Blockchain

The concept of Bitcoin (BitCoin) was first proposed by Satoshi Nakamoto in 2008, and then based on this idea, open source software and P2P built on it were designed and released. network. Bitcoin is a P2P form of digital currency. Peer-to-peer transmission means a decentralized payment system.
What is a P2P network?
Traditional currencies are uniformly issued by the central bank, and all personal savings are uniformly managed by banks. This is a typical centralized system.
Bitcoin is deployed on a decentralized network composed of many peer nodes around the world. Every node is qualified to record and issue this digital currency.
As for the underlying data storage of Bitcoin, it is based on blockchain technology. Each transaction in Bitcoin corresponds to a row in the block data. A simple diagram is as follows:
Each row of the transaction record contains a timestamp, transaction details, and digital signature.
The table is only for ease of understanding. The actual stored transaction details are anonymous, and only the wallet addresses of the payer and payee are recorded.
As for digital signatures, they can be understood as anti-counterfeiting marks for each single transaction, generated by an asymmetric encryption algorithm.
Next let’s talk about the rewards of Bitcoin miners:
The Bitcoin protocol stipulates that miners who mine new blocks will receiveThe reward has been 50 Bitcoins since 2008, and has been halved every 4 years. Currently, it is 12.5 Bitcoins in 2018. The new Bitcoins in circulation are all born in this way. No wonder everyone is so eager to mine Bitcoins!
Advantages and Disadvantages of Blockchain
Advantages of Blockchain:
1. Decentralization
Blockchain does not rely on a central node. The data of the entire system is All peer nodes in the entire network are jointly maintained and can store and verify data. In this way, unless the attacker hacks more than half of the nodes in the entire network, the entire system will not be destroyed.
2. Information cannot be tampered
The data in the block cannot be tampered with. Once the data is tampered with even a little bit, the hash value corresponding to the entire block will change accordingly, and it will no longer be a valid hash value, and the subsequent linked blocks will also be broken.
Disadvantages of blockchain:
1. Excessive consumption of energy
To generate a new block, a large amount of server resources must be used to perform a large number of unnecessary trial calculations, which seriously consumes electricity.
2. Network delay of information
Take Bitcoin as an example. Any transaction data needs to be synchronized to all other nodes. The synchronization process will inevitably be affected by network transmission delay, resulting in a long time consuming.
A few additional points:
1. Part of the content of this comic refers to Ruan Yifeng’s blog post "Blockchain Introductory Tutorial". I would like to thank this great master for his popular science.
2. Due to limited space, the knowledge about Merkle Tree and asymmetric encryption has not been discussed in detail for the time being. Interested friends can check the information for further study.

⑵ What does blockchain mean and how to understand it?

Blockchain is a new application model of computer technology such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm.

Blockchain is an important concept of Bitcoin. It is essentially a decentralized database. As the underlying technology of Bitcoin, it is a series of related data generated using cryptography methods. Each data block contains a batch of Bitcoin network transaction information, which is used to verify the validity of the information (anti-counterfeiting) and generate the next block.

Notes

1. Blockchain Originated from Bitcoin, on November 1, 2008, a person claiming to be Satoshi Nakamoto published the article "Bitcoin: A Peer-to-Peer Electronic Cash System", which elaborated on P2P network technology, encryption technology, The architectural concepts of electronic cash systems such as timestamp technology and blockchain technology mark the birth of Bitcoin.

Two months later, the theory entered practice. On January 3, 2009, the first creation with serial number 0The world block 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.

2. In order to realize the great leap forward development of blockchain finance, in order to promote the new development of China’s economy, accelerate the circulation of global assets, and realize the dream of rejuvenation that generations have been striving for, Puyin Group launched the On the 9th, a Puyin Blockchain Finance Guiyang Strategy Release Ceremony was held in Guizhou. At the meeting, the digital circulation of assets through blockchain, the blockchain financial transaction model, and the application of blockchain services and social public industries will be discussed. Explore.

⑶ What is the concept of blockchain? Read it in three minutes!

On October 25, 2019, Xinwen Broadcast sent a very important signal: the country must vigorously develop blockchain. After that, blockchain has become an Internet celebrity, and the figure of "blockchain" is floating in the streets and alleys. In fact, many technology companies have already deployed blockchain technology.

Although blockchain is very popular, many people do not know much about blockchain.

What is blockchain?

Let’s first take a look at how Du Niang explained it. Network display: Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithms.

Why is blockchain called blockchain?

The blockchain is linked by blocks one by one, and the blocks are storage units that record the communication information of each block node. The blocks are much like the records of a database. Each block is a storage unit. Writing data every time creates a block. With the expansion of information exchange, one block continues with another, and the result is called a blockchain.

What are the characteristics of blockchain?

Blockchain mainly has the following characteristics:

1. Decentralization: In the blockchain system, every node has equal rights. and obligations, there is no central control here. Decentralization has well established trust relationships with each other. Although there is no central management organization, people can collaborate with each other and trust each other. This mainly applies blockchain distributed ledger technology.

2. Openness: Blockchain data is open to everyone. Except for some encrypted information that is not open, everyone can check the data here.

3. Independence: 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 human intervention.

4. Security: Blockchain has a certain degree of security and cannot be tampered with. Because everyone in the blockchain system has the same ledger, if there isIf someone wants to tamper with it, then it is possible to forge a non-existent record only if they control more than 51% of the accounting nodes. Of course, this is basically impossible. This is mainly due to the core technology of the blockchain: the consensus mechanism. The consensus mechanism has the characteristics of "the minority obeys the majority" and "everyone is equal".

5. Anonymity: Many people think that if the blockchain is so open and transparent, will we lose privacy? In fact, no, although the transaction information in the blockchain is open and transparent, the identity information of the account is encrypted and can only be accessed with authorization.

Now let me tell you a story to help you better understand the blockchain.

There are three people in the family, mom, dad, older brother and younger brother. Last year, my father was in charge of the family's account books. He was responsible for all the family's income and expenses alone.

However, on the day of Double Eleven, my mother, who has always been frugal, wanted to buy herself a beautiful piece of clothing on a certain online store. When she checked the account book, she found something was wrong. It stands to reason that except for some money deposited in banks and financial management, the whereabouts of the daily consumption money at home are all in this account book, but no matter how you look at it, it is wrong. Some consumption is clearly not recorded, but is recorded.

Later, my father took the initiative to confess that he couldn’t help but buy a pack of cigarettes.

Later, my mother changed her strategy and the whole family kept accounts. Everyone recorded their monthly consumption expenditure in their own account books. Whenever there was a transaction or consumption at home, my mother would shout, "Book it," and everyone would record the transaction in their own books. This is the decentralized accounting model, where everyone is the center and everyone has a ledger.

The previous accounting model for dad was centralized accounting. If dad wanted to do something alone, it would be difficult for anyone to see it. The decentralized accounting model has solved the problem of centralization very well. The disadvantage of bookkeeping is that it is very difficult for dad to tamper with the books.

For example, if dad wants to take some money from the ledger and secretly buy cigarettes, the amount of money is limited, and if he wants to take the money, he has to change the ledger, but he only tampered with his own ledger. No, he had to change the accounts of three people including himself. And this is undoubtedly more difficult than reaching the sky.

So, many times my father had the idea of ​​smoking, but he had no choice but to give up the idea due to the current situation.

Are blockchain and Bitcoin the same thing?

In fact, blockchain and Bitcoin are not the same thing. It is just the underlying technology of Bitcoin. Bitcoin is the first digital currency applied by blockchain.

In 2008, Satoshi Nakamoto first proposed the concept of blockchain. In the following years, it became the core group of the electronic currency Bitcoin.It serves as a public ledger for all transactions. Blockchain was first applied to Bitcoin.

The origin of blockchain is to solve the problem of trust, and one of the most successful applications of blockchain is digital currency. Bitcoin is arguably the most successful application of blockchain so far.

What are the applications of blockchain?

The application of blockchain is actually very wide. In addition to digital currency, the future applications of Bitcoin are still very extensive. 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., promoting different industries to quickly enter the "blockchain+" era.

1. Payment and clearing: Blockchain can abandon the role of transit banks, realize point-to-point payment, reduce transit fees, and accelerate fund utilization.

2. Product traceability: For example, if we buy a piece of clothing on a certain store, we can see the past and present life of this piece of clothing.

3. Securities trading: Traditional securities trading requires the coordination of four major institutions, which is inefficient and costly. Blockchain technology can independently complete one-stop services.

4. Supply chain: Introducing blockchain technology into the supply chain system, synchronizing information within the system can control all links, better complete division of labor and collaboration, and facilitate subsequent accountability.

5. Intellectual property rights: With copyright on the chain, our photographic works, musical works, literary works, etc. will become our information, and the ownership of the information will be confirmed and become our property.

⑷ What is the popular explanation of blockchain? You must know these five application scenarios of blockchain!

Recently, blockchain has become popular overnight, and everyone around is discussing blockchain.

So, is the blockchain the same as Bitcoin?

In fact, Bitcoin and blockchain are not the same thing.

Blockchain is the underlying technology of Bitcoin, but the first usage scenario after the birth of blockchain is Bitcoin.

Bitcoin is just a string of data in a computer. Compared with paper currency, it is also called a "virtual currency". To put it simply, you can understand that Bitcoin is just a string of numbers with cash value, similar to Q coins. In other words, Bitcoin has no actual value. Its current value is supported by the faith of currency speculators. If the faith is gone, the value of Bitcoin will collapse.

What is blockchain? What are the characteristics of blockchain technology?

Let’s first take a look, why is blockchain called blockchain?

Data is stored in blocks, and the data stored block by block is called a block.Different blocks are linked to the previous block and are called blockchains.

For example:

On a certain day of a certain year, Lao Wang lent Xiao Wang 10,000 yuan. Lao Wang told everyone around him the news , the transfer records were posted on WeChat Moments, and everyone helped them testify to the existence of this transaction.

Lao Wang and Xiao Wang are two nodes. These two nodes generate transaction time, location, person and other information, and they are packaged to form a "block". Lao Wang’s friends are also nodes. These nodes jointly record the transaction status and details (blocks) of the two nodes, Lao Wang and Xiao Wang. These blocks are connected to form a blockchain.

Fundamentally, blockchain is a distributed ledger database.

What does distributed ledger mean?

Let’s take a look at the traditional accounting method.

The traditional accounting method is a centralized accounting method. For example, if Lao Wang lent 10,000 yuan to Xiao Wang, if Lao Wang did not tell the world about this money, then this amount would Only Lao Wang knows about the money transactions, Xiao Wang knows, God knows, and Earth knows. This accounting method is a centralized accounting method. This method has a very fatal shortcoming: what should I do if the other party does not acknowledge the account? In fact, in real life, in spontaneous private lending relationships, there is no evidence when the lending relationship occurs, resulting in many cases where the other party does not acknowledge the debt afterwards.

The accounting method adopted by Lao Wang from the beginning has prevented future troubles. This method is the blockchain distributed ledger, which has the characteristics of decentralization and allows everyone to It is the center and everyone can testify to the existence of this deal.

In addition to the characteristics of decentralization, blockchain also has the characteristics of being immutable. In the blockchain, if the data in any one block changes, even if it only changes a punctuation mark, it will become invalid and needs to be recalculated. Therefore, in the blockchain technology, once a piece of data changes, the cost will be Very big. Unless all nodes in this blockchain have 51% control. Therefore, the blockchain system will be stable and secure.

It’s still Lao Wang and Xiao Wang. If Xiao Wang wants to default on his debt, he can’t tamper with it unless he bribes everyone in the world who knows about the transaction.

Blockchain is also open and transparent.

In blockchain technology, all data is public, which is still the case of Lao Wang and Xiao Wang.

If Xiao Wang does not acknowledge the money, once this news is released, then Xiao Wang’s reputation will be ruined. He can only release new news and wash away the money by paying back the money. Clear your own identity.

Some people say that if the blockchain is so powerful, then my identity informationHas it been revealed and there is no privacy left? In fact, the blockchain has the characteristics of anonymity and protects our privacy very well. Unless required by legal regulations, technically speaking, the identity of each block node does not need to be disclosed or verified and can be done anonymously.

What are the applications of blockchain?

The origin of blockchain is to solve the problem of trust, and one of the most successful applications of blockchain is digital currency. Bitcoin is arguably the most successful application of blockchain so far.

In addition to digital currency, the future applications of Bitcoin are still very wide, and 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., promoting different industries to quickly enter the "blockchain+" era.

1. Payment and clearing

The role of the intermediary bank can be abandoned, point-to-point payment can be realized, intermediary fees can be reduced, and fund utilization can be accelerated.

2. Product traceability

For example, if we buy a piece of clothing on a certain website, we can see the past and present life of this piece of clothing.

3. Securities trading

Traditional securities trading requires the coordination of four major institutions, which is inefficient and costly. Blockchain technology can independently complete one-stop services.

4. Supply chain

Introduce blockchain technology into the supply chain system, synchronize information within the system, control all links, and better complete division of labor and collaboration. , to facilitate accountability afterwards.

5. Intellectual property rights

With copyright on the chain, our photographic works, musical works, literary works, etc. will become our information, and the ownership of the information will be confirmed and become our property.

⑸ What is the popular explanation of blockchain, and you can understand the blockchain with one picture

What is the popular explanation of blockchain, and you can understand the blockchain with one picture

Blockchain is a hot topic recently. Many people are discussing blockchain issues. Recently, some domestic companies have begun to use blockchain technology to develop some products. Blockchain is used for It is an underlying technology of Bitcoin. It is because of the popularity of Bitcoin that many people have paid attention to Bitcoin. However, many people still do not understand what blockchain is. Let me explain blockchain to me.

Bitcoin is a digital currency that many people are paying close attention to, and the underlying technology of Bitcoin is blockchain. Blockchain is a computer technology and a new application model. The blockchain is like a large database ledger. All transactions are recorded in this large ledger. The person who records this ledger is very different from the traditional bookkeeper.Accounting is usually performed by specialized accounting parties. For example, Taobao and Tmall are accounted for by Alibaba, WeChat transactions are accounted for by Tencent, and in blockchain, all people participate in accounting, and each participating accountant Everyone who keeps accounts has a ledger.

Let me give you an example. For example, A wants to borrow 10,000 yuan from B. B wants to lend the money to A, but is worried that A will default on the debt after borrowing the money, so he will ask for a loan when borrowing money. A third-party notary helps B write down the account. This is the traditional accounting method, which relies on a third party to gain trust. The accounting books are in the hands of the third party. This kind of accounting There is the possibility of a third party tampering with the ledger, and decentralization means that there is no need for a notary when borrowing money, and there is no need to rely on a third party to gain trust. The decentralized situation is like when B lends money to A, B takes Using a loudspeaker, he shouted, "A asked me to borrow 10,000 yuan. Please help me write down the account." At this time, everyone will take the account book in their hand and record the account. Everyone has an account book and can Avoid the possibility of ledger tampering.

⑹ What is blockchain

Blockchain means 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 "stupid and unforgeable", "full traces left", "traceable", "open and transparent" and "collectively maintained".

It first appeared in 1991 and was used by a group of researchers to time-stamp digital documents. So that these documents cannot be tampered with, the blockchain technology looks like a notary.

A blockchain is a distributed ledger that is completely open to everyone. It has a very interesting property: once the data is recorded in the blockchain, it is corrupted and difficult to change. So how exactly does it work? Next, let us first observe the composition of a single block.

Please click to enter the picture description (maximum 18 words)

Related information

Generally speaking, the blockchain system consists of data layer, network layer, consensus layer, incentive layer, contract layer and application layer. Among them, the data layer encapsulates the underlying data blocks and related basic data and basic algorithms such as data encryption and timestamps; the network layer includes distributed networking mechanisms, data dissemination mechanisms, and data verification mechanisms.

⑺ Why can’t you understand the blockchain in one sentence?

Blockchain is an extremely popular concept now. It is talked about almost everywhere and almost everyone is talking about it. . However, it seems that not many people really understand.

You must have seen articles like this on the Internet: "Tell you what blockchain is in X minutes", "Explain blockchain in X pictures", etc., but after reading it, you still think In the fog.

You must have heard someone explain blockchain in one sentence: Blockchain is a distributed ledger.

It’s indeed a sentence, but I know you still didn’t understand it.

You don’t understand what “distributed” is, let alone what “distributed ledger” is. What’s especially confusing is: isn’t it just a ledger? How come it has become a technology that will change the world? ?

Since you don’t understand this explanation, let me try to explain the blockchain from another angle.

Of course, it’s also a sentence.

Let us think about it carefully. No matter how mysterious blockchain technology is, it is just a tool. As long as it is a tool, it is used to solve certain problems.

From this perspective, blockchain technology is no different from the hammer in your home: the hammer is a tool, and the problem to be solved is the nail on the wall.

If a tool is difficult to explain "what it is", then ask another question: What does it solve? Could answering this new question help us finally understand this tool?

For example:

Epacadostater is an extremely complex molecular compound that represents the highest technological achievement in the field of biomedicine today. If you talk about the definition, it is almost impossible for you to explain to a layman what it is; but starting from the problem it solves, this magical drug can be explained clearly in one sentence: It is a specific drug for the treatment of AIDS.

This time, I know you must understand. Not because you understand the definition of Epacadostater, but because you understand the problem it solves: AIDS.

Therefore, this way of thinking is completely feasible by understanding the problem to understand the tool.

So, what problem does the blockchain want to solve?

A simple explanation in one sentence: Blockchain technology is an effective solution to the double-spend problem.

Okay, I admit I lied to you, but you still don’t understand. But don't hit me yet, we are actually very close.

Look at these two sentences:

The key to these two sentences is: you understand AIDS, but you don’t understand the "double spend" problem. It is precisely because of this The difference in cognition means that you can understand the first sentence but not the second sentence.

Therefore, understanding the double-spending problem is the key to understanding the blockchain!

Let’s explain what the “double-spending” problem is, although it is not in one sentence. But it is not difficult to understand.

From our daily useStarting from WeChat, you must be familiar with the following two scenarios:

On the surface, the two scenarios seem to be similar, but in fact, there are huge differences!

You put I sent the photo to someone else and the photo is still there, but the money to send it is gone. Why?

Maybe you think it should be like this: If the money was still there, wouldn’t everyone have endless money to spend (dreams come true)!

No, the truth behind this The logic is not ordinary at all. Let me explain why.

Now, each of us has to face two different worlds at the same time: a physical real world and a virtual online world (mobile phones, computers, the Internet, etc.). The former is composed of atoms and molecules. Composition, and the latter's constituent elements are "numbers". Let me call the second world the "digital world"

The "digital world" is one of mankind's greatest inventions. Many tasks that are difficult to complete in the real world cannot be accomplished in the "digital world" can be easily implemented.

For example, in the real world, you have a paper photo, you want to share it with your distant friends, and you also want to keep a copy for yourself. To do this, you need to go to a photo studio to make copies and then mail them to the post office. Not to mention the trouble, it takes time.

In the digital world, all you need is a tap on your phone, and in an instant, your distant friend will receive the photo. very convenient.

Why is it so convenient?

In the real world, molecules and atoms are not easy to copy, and there is no way to transmit them at high speed. In the digital world, numbers are extremely easy to copy and can be transmitted at high speed (in fact, you can By sending a photo, you are sending a copy of the photo, and copying is a natural thing in the digital world).

Relying on this characteristic, the digital world provides convenience far beyond the real world and has greatly changed our lives.

However, people find that this convenience encounters a huge difficulty: how to transmit "money" in the digital world?

In the real world, if you give 100 yuan in cash to your friend, you will naturally have 100 yuan less cash in your pocket, and your friend will naturally have 100 yuan more cash in his pocket. This kind of physical operation does not require the intervention of others.

However, in the digital world, the components of everything are numbers. There is no difference between 100 yuan (or other valuable things) and photos, they are all numbers. Numbers can be easily copied and transmitted.

But you obviously cannot transfer money by transferring photos (copying digital copies). If the photos are transferred, you can keep an original copy, but if the money is transferred, you cannot keep the money..

In other words, in the digital world, you can have countless copies of your photos, but you can only have one copy of your "money". When "money" circulates between different owners, it must be its "real person", which just changes the owner, unlike photos that can have multiple "doppelgangers".

Because this "uniqueness" is inconsistent with the nature of the digital world, additional mechanisms must be in place to ensure this. Otherwise, once the money can be copied, you can first transfer 100 yuan to one person, and then transfer the copy to other people. This is equivalent to a 100 yuan being spent twice. This is the so-called "double spending problem". )".

To sum up, although the "double spending" problem can make everyone have more money to spend, the modern financial system absolutely cannot accept this.

How to solve it? You are familiar with the previous solution, which is the bank. The bank is responsible for recording the owner of each money.

The bank will give each person an account. After your transaction is completed, the bank will do the following: record that there is a loss of 100 yuan in your account, and record that there is an increase of 100 yuan in your friend's account. The yuan just changed owners and was not copied. Here the bank acts as a trusted intermediary.

But the banking system has various problems:

It is slow. It may take several days to transfer a sum of money. This is not the efficiency that the digital world should have.

Risk: Banks are vulnerable to hacker attacks.

Expensive, high handling fees, you know.

For these reasons, we don’t want banks to be the “intermediaries”. Is there any other way to solve the double-spending problem mentioned above without any intermediary?

For a long time, the answer was no.

There is no way to solve the double-spending problem in a digital world without banks. Until one day, a genius came up with blockchain technology, and everything changed from then on!

Blockchain technology is an effective solution to the double-spending problem. It allows humans to fully enjoy the advantages of the digital world in transactions for the first time, which is fast, safe, reliable and cheap. With blockchain technology, you can transfer money to friends just like sending photos, and more importantly, there is no bank in the whole process!

Perfect!

The following is a summary of this article:

1. Don’t understand blockchain from its definition, but start with the problems it solves.

2. The real world is composed of molecules and atoms, which is not easy to copy and transmit.lose.

3. Everything in the digital world is composed of numbers, which solves the problem of difficulty in copying and transmitting in the real world, but brings new double-spending problems.

4. Building a bank-centered network can solve the double-spend problem in the digital world, but it also brings other problems: low efficiency, high cost, poor security, etc.

5. Blockchain technology solves the above problems. The explanation in one sentence is: Blockchain is a tool that can solve the double-spend problem in the decentralized digital world.

I hope after reading this, you can understand what the blockchain does by understanding the "double spend" problem. As for how the blockchain works specifically, I will introduce it to you in a subsequent article.

Finally, I made up Epacadostater, there is no such thing.

⑻ What is the most understandable explanation of blockchain

Blockchain has become very popular in recent years, with attention and exposure continuing to rise. Many domestic giants have opened their arms. Embrace, regard blockchain as a great disruptive innovation in the Internet era, and swarm to study how to turn blockchain into a tool for you to seize business opportunities.

So, what exactly is blockchain technology? You can recognize each Chinese character individually, but you don't know what they mean when put together. For the blockchain, which everyone thinks is extremely mysterious, now there is a most understandable explanation.

What is blockchain? Let’s first use the love story that everyone loves to talk about as a simple example.

Build a simple blockchain model, then the following situations will occur when falling in love in this blockchain model.

In the future, all the men and women of the right age will fall in love and the whole process of commitment to get married will be agreed upon by all other men and women of the right age, and all the stories that happen between two people together will form a block.

All other men and women are the chain. If a third party intervenes or you violate your partner, others can see it, and you will never find a partner in the future.

To be precise, the blockchain is a "full center" system, that is, every node on the chain is the center.

Men and women in trial marriage fall in love, show off their love on friends, promise to love each other for a lifetime and be known by all other marriageable men and women is the application of blockchain. If one day one party breaks their promise, don't think that deleting the photos will be useful, because everything is recorded by all marriageable men and women.

It cannot be deleted or changed, this is blockchain technology.

If this technology is applied to the business field, its "purifying" effect on the business environment will be imaginable, which explains why blockchain technology is so popular.

The Internet has entered the ecological era, and its applications have penetrated into many fields such as financial services, Internet of Things, supply chain management, digital asset transactions, and e-commerce. The emergence of the blockchain has transformed the development of the Internet from the information Internet to the value Internet and the order Internet. Its "distributed business" model with the sharing economy and value link as the main features will give birth to a large number of new cross-institutional innovative cooperation scenarios and build The creation of a new industrial ecosystem with blockchain technology as the virtual center will have a disruptive impact on economic and social governance, industrial transformation and innovation.

On this basis, the Caoxin, Caoshang, Caodao and Caoai projects built by Caoliu Commune based on blockchain technology are composed of founding nodes, institutional nodes, partner nodes, and first-level nodes. , second-level and below nodes, and ordinary members constitute a new Internet ecosystem, outlining an environment that is fully in line with today's national policies and allows users to have the opportunity to participate in blockchain technology. Users can obtain grass coins by participating in community work. Users The obtained grass coins can be exchanged for Caoxin CT or traded on the trading platform to realize the circulation and appreciation of grass coins.

This is the first blockchain technology to be applied to the real industry ecosystem. It is also an example of financial thinking with Chinese characteristics that is deeply adapted to the commercial and financial environment based on China’s national conditions and uses blockchain technology to transform the traditional commercial and financial system. A historic innovation in decentralized reconstruction.

⑼ Terminology explanation blockchain

Blockchain is explained as follows:

Blockchain is actually equivalent to a disintermediated database, which is composed of Composed of string data blocks. Each of its data blocks contains information about a Bitcoin network transaction, which is used to verify the validity of the information and generate the next block.

In a narrow sense, blockchain is a chain data structure that combines data blocks in a sequential manner in chronological order, and is cryptographically guaranteed to be inextricable. Tamper-proof and unforgeable distributed ledger.

Type

Public Blockchain

Public Block Chains: Any individual or group in the world Transactions can be sent and effectively confirmed by the blockchain, and anyone can participate in its consensus process.

Public blockchain is the earliest blockchain and the most widely used blockchain. The virtual digital currencies of all major bitcoins series are based on public blockchains. There is only one such blockchain in the world. The blockchain corresponding to the currency.

Industry Block Chains

Industry Block Chains (Consortium Block Chains): Multiple pre-selected nodes are designated within a certain group as bookkeepers, and each block is generated by All pre-selected nodes make a joint decision (pre-selected nodes participate in the consensus process);

Other access nodes can participate in transactions, but do not participate in the accounting process (it is essentially still managed accounting, but becomes a distributed accounting process)Accounting, the number of pre-selected nodes, and how to determine the bookkeeper of each block have become the main risk points of the blockchain). Anyone else can make limited inquiries through the open API of the blockchain.

Private Block Chains

Private Block Chains: Only use the general ledger technology of the blockchain for accounting. It can be a company or an individual. With exclusive write access to the blockchain, this chain is not much different from other distributed storage solutions.

Traditional finance is trying to experiment with private blockchains, while public chain applications such as Bitcoin have been industrialized, and private chain application products are still being explored.

⑽ Please briefly talk about blockchain! Thank you

The simplest explanation of blockchain The most understandable meaning of blockchain
Blockchain is being used more and more widely and will play a major role. Blockchain is It has become the forefront of global technology development, and together with artificial intelligence, quantum information, mobile communications, and the Internet of Things, it is listed as a representative of the new generation of information technology.
Blockchain is a database shared across computer networks. Once a record is added to the data chain, it is difficult to change. To ensure that all copies of the database are identical, the network is constantly checking.
Blockchain Database
As we all know, data can be any information, such as transaction information. This data information can be bundled together into an interoperable data block. These data blocks can be composed one after another to form an interoperable data link. The basic part of the blockchain database is shown in the figure below:
How the blockchain operates
We take an online transaction as an example to explain the operation and steps of incorporating this transaction into the blockchain:
First Step: Record the transaction. Suppose Zhang San sells an item to Li Si online and completes an online transaction. This record data lists detailed transaction information, including digital signatures from all parties.
Step 2: The transaction record is checked through the network. Computers called "nodes" in the network check the details of the transaction to ensure it is correct and valid.
Step 3: Records accepted by the network check are added to the data block. Each data block contains a unique code. It also contains the unique code of the previous data block in the data chain.
Step 4: The data block is added to the data blockchain. Unique codes connect blocks of data together in a specific order.