区块链实战 豆瓣,区块链书籍推荐 豆瓣

今天，我们要讨论的话题是区块链实战，以及基于豆瓣的区块链书籍推荐。除此之外，我们还将探讨3个相关关键词：比特币、区块链应用和区块链技术。

首先，让我们来聊聊比特币。比特币是一种去中心化的数字货币，是第一个使用区块链技术的虚拟货币。它的发行量有限，且不受中央银行、政府机构的控制，只受市场供求的影响。比特币的发行量有限，比特币的价格会随着市场的供求而波动，这也是比特币的吸引力所在。

其次，让我们来聊聊区块链应用。区块链应用是指利用区块链技术开发出的应用程序，它可以让用户在线上进行购物、支付、转账等操作，实现安全、快捷的交易。区块链应用可以让用户在线上实现自动化交易，减少了人工介入，提高了效率。同时，它还可以防止网络攻击，保护用户的数据安全。

最后，让我们来聊聊区块链技术。区块链技术是一种分布式数据库技术，它能够让数据在全网中传播，并且能够被所有人共享和查看。这种技术可以用来存储金融交易记录、电子合同、智能合约等信息，保护数据安全，提高数据的可靠性。由于它的分布式特性，区块链技术可以更有效地解决金融机构、政府机构和企业等组织的数据安全和信任问题。

请查看相关英文文档

① 2020-Blockchain Basics 25 Lectures-Why the world needs blockchain

1. Trust and integrity in peer-to-peer systems; the two most important ones The first condition is to understand the node data in the system, and the second is to understand the trustworthiness of the node.

2. Threats: technical failures and malicious nodes.

3. For a completely decentralized peer-to-peer system, the core problem solved by the blockchain is to realize and ensure the completeness of the system.

4. There are four ways to define blockchain. One is a data structure, just like a book. Each page has a specific message and each page has a specific encoding. Determined; the second is an algorithm, an algorithm that properly coordinates and organizes a large number of specific data structures; the third is a complete technical solution, that is, the integration of data structures, algorithms, cryptography and security technology; the fourth is in general applications An umbrella term for a fully decentralized peer-to-peer system in a scenario.

5. The blockchain is a completely distributed point-to-point ledger system. It uses a special algorithm to coordinate the order of information generation in the block, and uses encryption technology to encrypt the blockchain data. connections to ensure system integrity.

6. Ownership management;

7. Ownership and witnesses. It is a good thing to have one witness, but having multiple independent witnesses is a way to prove to the prosecutor that you The key to innocence.

8. 3 steps to prove ownership

* Proof of owner

* Proof of ownership of things
< br /> * Provide a connection between the owner and things

9. Identity authentication, authentication, and authorization; identity authentication refers to confirming the identity of the user; authentication refers to proving that you are indeed The person you claim to be; authorization refers to allowing you to access specific resources or obtain specific services based on previous identification.

10. The nature and significance of ledgers; publicity (reading data, viewing historical data, maintaining status) and privacy (writing data, creating new data, changing status)

11. The connection between ownership and blockchain:

* A single ledger can be used to record information related to ownership, and can be regarded as a ledger that stores data related to ownership in the blockchain. ;

* A single ledger is stored on nodes in a peer-to-peer system;

* The blockchain algorithm ensures that each node can synchronize to A state;

* SystemThe completeness is the key for the system to provide true and correct ownership description;

* Cryptography technology must be used in identity authentication, authentication, authorization and ensuring data security;

12. The meaning of double spending includes; problems caused by copying digital goods; possible problems in decentralized peer-to-peer distributed ledgers; an example of completeness violation in a fully distributed peer-to-peer system; Blockchain technology is a A way to solve the double-spending problem.

② "Blockchain Encyclopedia: An introductory manual for Bitcoin and other digital currencies that everyone can understand" epub download and online reading, please ask for Baidu Netdisk cloud resources

《区"The Complete Book of Blockchain Network" (Sun Jian) ​​e-book network disk download for free online reading

Resource link:

Link:

Extraction code: in5d

Book title: Complete Book on Blockchain Network

Author: Sun Jian

Douban Rating: 7.3

Publisher: Electronic Industry Press

p>

Publication year: 2018-8

Number of pages: 289

Content introduction:

Online full-book content structure, vivid cases and explanations are enough to allow every reader to fully and quickly understand the knowledge related to blockchain and digital currencies such as Bitcoin. It can be called a complete survival manual for the blockchain and currency circles. Ejian Wufeng’s digital currency investment ideas are also a guidebook for gold nuggets in the currency circle.

This book explains the "past and present" of blockchain technology in simple and vivid language, and points out the intrinsic connection between Bitcoin and currency, including the development history of digital currency, blockchain technology and application interpretation , the secrets of the blockchain communication circle, basic knowledge such as managing your own digital wallet. In addition, it also comprehensively disclosed the entire process of digital currency "mining" from the principle to the purchase and setup of mining machines, detailed the process and common sense of digital currency transactions, and demonstrated step by step all aspects of a digital currency from generation to exchange. The process and details revealed various routines and scams in the name of digital currency.

This book hopes to allow more ordinary users to understand blockchain in a faster way. After reading this book, you will have a comprehensive understanding of blockchain and digital currencies such as Bitcoin, master basic investment concepts, identify common routines and scams, and stand at a higher cognitive starting point in the blockchain industry. Find your place in the feast of technology and wealth.

About the author:

Sun Jian, a native of Nanjing, is a currency player. Specialized in social marketing, training, content dissemination and other fields. In 2015, he published the book "WeChat Marketing and Operation: Revealing the Practical Secrets of Official Accounts, WeChat Business and Self-Media", which was widely praised. Currently engaged in research and investment in blockchain and digital currencies.

③ 108 essential knowledge points for getting started with blockchain

Author: Kong Lin

61. Hold-up

Expect the currency price to rise, but unexpectedly the currency price falls after buying; or expect the currency price to fall, but unexpectedly sell the currency price, but the currency price rises

62 . Unlock

After buying Bitcoin, the currency price fell, causing temporary book losses, but then the currency price rebounded and the loss turned into profit

63. Going short

After selling Bitcoin because of the bearish market outlook, the price of the currency continued to rise. I was unable to buy it in time, so I failed to make a profit

64. Overbought

The price of the currency continued to rise. At a certain height, the buyer's power is basically exhausted, and the currency price is about to fall

65. Oversold

The currency price continues to fall to a certain low, the seller's power is basically exhausted, and the currency price is about to fall. Recover

66. Lure bulls

The currency price has been consolidating for a long time and is more likely to fall. Most of the short sellers have sold Bitcoin. Suddenly the short side pulls up the currency price and induces Many parties thought that the price of the currency would rise and bought one after another. As a result, the short parties suppressed the price of the currency and locked up the long parties.

67. Short-selling

After the bulls bought Bitcoin, they deliberately suppressed the currency. price, making short sellers think that the price of the currency will fall, and sell them one after another. As a result, they fall into the trap of bulls

68. What is NFT

The full name of NFT is "Non-Fungible Tokens", which is non-fungible tokens. Simply put, it is an inseparable copyright certificate on the blockchain. It is mainly used to confirm and transfer the rights of digital assets. The difference from digital currencies is that it Unique, indivisible, and essentially a unique digital asset.

69. What is the Metaverse

The Metaverse is a collection of virtual time and space, consisting of a series of augmented reality (AR), virtual reality (VR) and the Internet (Internet) Composed of digital currency, which carries the function of value transfer in this world.

70. What is DeFi

DeFi, the full name is Decentralized Finance, which is "decentralized finance" or "distributed finance". "Decentralized finance", as opposed to traditional centralized finance, refers to various financial applications established in open decentralized networks. The goal is to establish a multi-level financial system based on blockchain technology and cryptocurrency. As a basis, re-create and improve the existing financial system

71. Who is Satoshi Nakamoto?

72. Bitcoin is different from Q Coin

Bitcoin is a decentralized digital asset with no issuing entity. Q Coin is an electronic currency issued by Tencent. It is similar to electronic points, but it is not actually a currency.Q Coin requires a centralized issuing institution. Q Coin can only be recognized and used because of the credit endorsement of Tencent. The scope of use is also limited to Tencent's games and services. The value of Q coins is entirely based on people's trust in Tencent.

Bitcoin is not issued through a centralized institution, but it is widely recognized around the world because Bitcoin can self-certify its trust. The issuance and circulation of Bitcoin are jointly accounted for by miners across the entire network, and are not A central authority is also needed to ensure that no one can tamper with the ledger.

73. What is a mining machine?

Taking Bitcoin as an example, a Bitcoin mining machine is a professional equipment that competes for accounting rights by running a large amount of calculations to obtain new Bitcoin rewards. It is generally composed of a mining chip, a heat sink and a fan, and only performs A single calculation program consumes a lot of power. Mining is actually a competition between miners for computing power. Miners with more computing power have a greater probability of mining Bitcoin. As the computing power of the entire network increases, it becomes increasingly difficult to mine bits with traditional equipment (CPU, GPU), and people have developed chips specifically for mining. The chip is the core part of the mining machine. The operation of the chip will generate a large amount of heat. In order to dissipate heat, Bitcoin mining machines are generally equipped with heat sinks and fans. Users download Bitcoin mining software on their computers, use the software to assign tasks to each mining machine, and then start mining. Each currency has a different algorithm and requires different mining machines.

74. What is quantitative trading?

Quantitative trading, sometimes also called automated trading, refers to the use of advanced mathematical models to replace human subjective judgments, which greatly reduces the impact of investor sentiment fluctuations and avoids extreme fanaticism or pessimism in the market. make irrational investment decisions. There are many types of quantitative trading, including cross-platform trading, trend trading, hedging, etc. Cross-platform trading means that when the price difference between different target platforms reaches a certain amount, sell on the platform with a higher price and buy on the platform with a lower price.

75. Blockchain asset over-the-counter trading

Over-the-counter trading is also called OTC trading. Users need to find their own counterparties and do not need to match the transaction. The transaction price is determined by negotiation between the two parties. The two parties can fully communicate through face-to-face negotiation or telephone communication.

76. What is a timestamp?

The blockchain ensures that each block is connected sequentially through timestamps. Timestamps enable every piece of data on the blockchain to have a time stamp. Simply put, timestamps prove when something happened on the blockchain and cannot be tampered with by anyone.

77. What is a blockchain fork?

Upgrading software in a centralized system is very simple, just click "Upgrade" in the app store. However, in decentralized systems such as blockchain, "upgrading" is not that simple, and a disagreement may even cause a blockchain fork. Simply put, a fork occurs when a blockchain undergoes an “upgrade”differences of opinion, leading to blockchain forks. Because there is no centralized organization, every code upgrade of digital assets such as Bitcoin needs to be unanimously recognized by the Bitcoin community. If the Bitcoin community cannot reach an agreement, the blockchain is likely to form a fork.

78. Soft fork and hard fork

Hard fork means that when the Bitcoin code changes, the old nodes refuse to accept the blocks created by the new nodes. Blocks that do not comply with the original rules will be ignored, and miners will follow the original rules and create new blocks after the last block they verified. A soft fork means that old nodes are not aware of the changes to the Bitcoin code and continue to accept blocks created by new nodes. Miners may work on blocks they have no understanding of, or validation of. Both soft forks and hard forks are "backwards compatible" to ensure that new nodes can verify the blockchain from scratch. Backward compatibility means that new software accepts data or code generated by old software. For example, Windows 10 can run Windows XP applications. Soft forks can also be "forward compatible".

79. Classification and application of blockchain projects

Judging from the current mainstream blockchain projects, blockchain projects mainly fall into four categories: Category 1: Currency; The second category: platform category; the third category: application category; the fourth category: asset tokenization.

80. USDT against the US dollar

USDT is Tether USD, a token launched by Tether that is against the US dollar (USD). 1USDT=1 US dollar, users can use USDT and USD for 1:1 exchange at any time. Tether implements a 1:1 reserve guarantee system, that is, each USDT token will have a reserve guarantee of 1 US dollar, which supports the stability of the USDT price. The unit price of a certain digital asset is USDT, which is equivalent to its unit price in US dollars (USD).

81. Altcoins and alternative coins

Altcoins refer to blockchain assets that use the Bitcoin code as a template and make some modifications to its underlying technology blockchain, among which Those with technological innovations or improvements are also called alternative coins. Because the Bitcoin code is open source, the cost of plagiarism in Bitcoin is very low. You can even generate a brand new blockchain by simply copying the Bitcoin code and modifying some parameters.

82. Three major exchanges

Binance

Okex

Huobi

83. Market software

Mytoken

Non-small account

CMC

84. Information website

Babbitt

Golden Finance

Coin World News

85. Blockchain Explorer

BTC

ETH

BCH

LTC

ETC

86. Wallet

Imtoken

Bitpie

87. Decentralized Exchange

uniswap

88. NFT Exchange

Opensea

Super Rare

89. Ladder

Bring your own, buy a reliable ladder

90. Platform currency

A digital currency issued by the platform, used to deduct handling fees, transactions, etc.

91. Bull market, bear market

Bull market: rising market

Bear market: falling market

92. Blockchain 1.0

Based on distributed The currency transaction system of the ledger is represented by Bitcoin

93. Blockchain 2.0

The contract blockchain technology represented by Ethereum (smart contract) is 2.0

94. Blockchain 3.0

In the era of intelligent Internet of Things, it goes beyond the financial field to provide decentralized solutions for various industries

95. Smart Contract

Smart Contract is a computer protocol designed to disseminate, verify or execute contracts in an information-based manner. Simply put, an electronic contract is set in advance and once both parties confirm, the contract is automatically executed.

96. What is a token?

The token economy is an economic system with Token as the only reference standard, which is equivalent to a pass. If you own Token, you have rights and interests, and you have the right to speak.

Big data is the means of production, AI is the new productivity, and blockchain is the new production relationship. Big data refers to a collection of data that cannot be captured, managed and processed within a certain time range using conventional software tools. It is a massive, high-growth and high-volume data set that requires new processing models to have stronger decision-making power, insight discovery and process optimization capabilities. Diverse information assets. Simply understood, big data is massive data accumulated over a long period of time and cannot be obtained in the short term. Blockchain can be used as a way to obtain big data, but it cannot replace big data. Big data is only used as a medium running in the blockchain and has no absolute technical performance, so the two cannot be confused. (The production relationship is simply understood as labor exchange and consumption.Relationship, the core lies in productivity, and the core of productivity lies in production tools)

ICO, Initial Coin Offering, initial public token issuance, is crowdfunding in the blockchain digital currency industry. It is the most popular topic and investment trend in 2017, and the country launched a regulatory plan on September 4. Speaking of ICO, people will think of IPO, and the two are fundamentally different.

99. Five characteristics of digital currency

The first characteristic: decentralization

The second characteristic: having open source code

The third feature: independent electronic wallet

The fourth feature: constant issuance

The fifth feature: global circulation

100. What is decentralization?

It has no issuer, does not belong to any institution or country, and is a publicly issued currency designed, developed and stored on the Internet by Internet network experts.

100. What is measurement (scarcity)?

Once the total amount of issuance is set, it is permanently fixed, cannot be changed, cannot be over-issued at will, and is subject to global Internet supervision. Although the difficulty of mining and mining changes over time, the longer the time, the greater the difficulty of mining and the fewer coins that are mined, so it is scarce.

101. What is open source code?

The alphanumeric code is stored on the Internet. Anyone can find out the source code of its design, everyone can participate, can mine it, and it is open to the world.

102. What is anonymous transaction? Private wallet private?

Everyone can register and download the wallet online without real-name authentication. It is completely composed of encrypted digital codes. It can be sent and traded globally in real-time point-to-point without resorting to banks or any institutions. It cannot be traced by anyone without my authorization. ,Inquire.

A contract transaction refers to an agreement between a buyer and seller to receive a certain amount of an asset at a specified price at a certain time in the future. The objects of contract trading are standardized contracts formulated by the exchange. The exchange stipulates standardized information such as commodity type, transaction time, quantity, etc. A contract represents the rights and obligations of the buyer and seller.

105. Digital Currency Industry Chain

Chip manufacturers, mining machine manufacturers, and mining machine agents mine and export to exchanges for retail investors to speculate in coins< /p>

106. Who is Kong Lin?

Kong Lin: Digital currency value investor

Investment style: Steady

p>

107. Konglin Investment Strategy

Combining long and short term, focusing on price investment, no contracts, no short-term play

Reasonable layout, scientific operation, prudent and conservative, making periodic money

108. Empty forest?

Welcome currency friends and seek common development

④ "Blockchain Principles, Design and Applications" pdf download and online reading, please seek Baidu network disk cloud resources

"Blockchain Principles, Design and Applications" (Yang Baohua) e-book network disk download free online reading

Resource link:

Link: https://pan..com/s /1DdjQcCL5D84cnoqm-HcBjg Extraction code: 8u8b

Book title: Blockchain Principles, Design and Application

Author: Yang Baohua

Douban score: 7.2

Publisher: Machinery Industry Press

Publication year: 2017-8-21

Number of pages: 366

Content introduction:

This book is written by the core designers and developers of Hyperledger and is a professional guide to blockchain development and implementation. From the shallower to the deeper, it systematically introduces the essence of Hyperledger Fabric design, application development, etc. The book is divided into two parts: theory and practice; Chapters 1 to 3 introduce the origin, core ideas and typical application scenarios of blockchain technology; Chapters 4 to 5 focus on introducing a large number of distributed technologies that appear in blockchain technology. System technology and cryptographic security technology; Chapters 6 to 8 introduce three typical open source projects in the blockchain field: Bitcoin, Ethereum and Hyperledger; Chapters 9 to 11 take the Hyperledger Fabric project as an example to explain in detail Installation and deployment, configuration management, and practical experience in using Fabric CA for certificate management; Chapter 12 focuses on the core architecture design of the Hyperledger Fabric project; Chapter 13 introduces relevant techniques and examples of blockchain application development; Chapter 14 introduces The design and development of the blockchain service platform, and the relevant knowledge of building a service platform using the Hyperledger Cello project. This book covers the latest technologies in the field of blockchain and distributed ledgers, helping readers deeply understand the core principles and typical design implementations of blockchain, as well as efficiently develop distributed applications based on blockchain platforms.

About the author:

Yang Baohua

Ph.D., graduated from Tsinghua University. Chairman of the Hyperledger Greater China Technical Working Group, Chief Consultant of IBM Greater China Blockchain Technology Community, and Senior Researcher. He has presided over the architecture design and R&D implementation of multiple large-scale system platforms. He is an early researcher and practitioner of blockchain, cloud computing, big data and other technologies. He loves open source technology, Zeng GongDedicated to OpenStack, OpenDaylight and other open source projects, he is the core designer and developer of the Hyperledger Fabric project, and the initiator of the Cello and Fabric-SDK-Py projects. The personal homepage is https://yeasy.github.com.

Chen Chang

Graduated from Tsinghua University. CTO of Zhigui Technology, formerly a senior researcher at IBM. Technical directions include cloud computing, blockchain, machine learning, etc. He is an early researcher and promoter of blockchain technology and a core developer of the Hyperledger project. He has rich practical experience in blockchain applications. He was responsible for the architectural design and implementation of blockchain solutions in the financial industry, and led the development of several blockchain service platforms.

⑤ Can you recommend any books on blockchain?

There are more and more books in the field of blockchain, and many of them The quality is actually not high. I recommend two better books that I have actually read and summarized.

---

A book is "Book Blockchain".

This book is characterized by using interesting and vivid comics to express some principles and applications of blockchain.

This book is especially suitable for newcomers who have just come into contact with blockchain, because the principles in it are analyzed using more real-life cases, which is relatively easy to understand and involves blockchain. Technical knowledge is relatively low.

And this book is not thick, so you can finish it quickly. After all, everyone is very busy at work now. If you read a very thick book, it is indeed difficult to read. This book happens to be more It is thin and light and can easily cultivate your interest in learning knowledge in the blockchain field.

WeChat public account: Shenzhen Blockchain Community

⑥ What are the basic knowledge about blockchain

1. District Application of Blockchain Technology in the Banking Industry

The biggest feature of blockchain technology is decentralization, and this feature will reduce a lot of costs for the banking industry. The development of digital currency will make it possible to realize real-time digital transactions in banks. For example, in bill transactions, bank bill transactions have always relied on a third party to realize the transfer of valuable certificates. Even electronic bill transactions require interactive authentication through information from the central bank's ECDS system. . Blockchain technology can realize point-to-point transfer of value and no longer requires centralized system control. This not only speeds up the speed of ticket transfer, but more importantly, it can reduce errors caused by human factors and reduce processes. Naturally, it will reduce the bank's demand for personnel and save the bank's labor costs.

2. Application of blockchain technology in the insurance industry

Blockchain technology also has incomparable advantages in the insurance industry. From a data management perspective, insurance companies’ application of blockchain technology can effectively improve risk management and control capabilities, including insuranceRisk supervision of insurance companies and risk management of policyholders.

The application of blockchain technology in the insurance industry can strengthen the internal risk supervision of insurance companies. Blockchain technology can record the daily operating processes of insurance companies on nodes, and can achieve in-process control over the company's capital flow, investment status, compensation payments and other businesses, and improve the company's risk management and control capabilities.

3. Application of blockchain technology in the securities industry

The application of blockchain technology in the securities industry can increase the flexibility of securities issuance. Companies issuing securities can use smart contracts , by setting the method and time of securities issuance, securities can even be issued 24 hours a day under the most ideal condition.

4. Blockchain technology and financial infrastructure

Blockchain technology uses a decentralized mechanism to exchange value, which will lead to a modern world characterized by centralization. Some financial infrastructures have undergone earth-shaking changes.

5. Application of blockchain technology in supply chain

The application of blockchain technology in supply chain first provides credit guarantee , the blockchain records the circulation information of commodities, etc., which can prove the true reliability of commodities and their circulation, so as to conduct a comprehensive evaluation of the utility of enterprises on the chain, etc., and has become an important factor for corporate bank loan credit, financing credit, An effective guarantee for transaction credit.

⑦ "Blockchain Technology Guide" pdf download, read the full text online, seek Baidu network disk cloud resources

"Blockchain Technology Guide" (Zou Jun) e-book network disk download Free online reading

Link:

Extraction code: 6jbv

Book title: Blockchain Technology Guide

Author: Zou Jun< /p>

Douban score: 6.4

Publisher: Machinery Industry Press

Publishing year: 2016-11-1

Number of pages: 254

Content introduction:

Chapter 1-2 is the basic and introductory content, focusing on the introductory introduction to blockchain and explaining some basic concepts of blockchain. This book introduces the basic knowledge and concepts of blockchain in detail and comprehensively, analyzes the architecture, underlying implementation details and encryption technology of blockchain, and provides a comprehensive interpretation of the popular blockchain with industry application cases, frequently asked questions, etc. Technology implementation and application. Chapters 3-10 focus on the analysis of blockchain architecture and explain the key technologies of blockchain, including cryptography and consensus algorithms; provide Bitcoin development guide and Ethereum smart contract development guide; also introduce HyperLedger and discuss blockchain Common chain problems and typical solutions. Chapter 11 discusses the driving force of IT development from the perspective of architectural change and provides some prospects for blockchain’s future IT development.

About the author:

Zou Jun, Zhongguancun Blockchain Industry Alliance expert, service contract (ServiceContrAct), focuses on and practices blockchain technology and applications, and is currently the CTO of Haina Cloud. Formerly the chief software architect of IBM Australia's financial industry. Specialized in cloud computing, big data, and software-defined storage. A high-end foreign expert from Beijing who has published more than 20 papers in international conference journals.

Zhang Haining is the chief architect of VMware China's cloud native applications, the leader of the Harbor enterprise-level open source container registry project, and one of the earliest technical evangelists in the CloudFoundry Chinese community. He has many years of software development experience. He once served as a senior software engineer at IBM and a senior architect at Sun. Currently focusing on research and development in the fields of containers, cloud computing and blockchain.

Tang Yi, a professor at Guangzhou University and a Doctor of Science, focuses on network information security, distributed computing, blockchain security and applications, etc. He has developed elliptic curve cryptography software for well-known foreign security companies and won the Cryptotechnology Award Second Prize for Progress (Provincial and Ministerial Level). He has presided over or participated in the completion of the National Science and Technology and Talent Project Fund work for many times.

Li Lei is an associate professor at Hefei University of Technology and a Ph.D. at Macquarie University. Good at data mining, social computing, and intelligent computing. He has served as a member and organizer of the program committee of IEEE international conferences for many times, and has published more than 40 papers in the fields of social computing and blockchain, which have been cited more than 350 times.

⑧ Easy-to-understand explanation of blockchain

A simple explanation of blockchain technology is as follows:

In simple terms: Blockchain is a new generation network system formed using a package of existing network technologies. This network system has a new structure, a new mechanism, and unprecedented new value. Five major technologies or innovations are specifically used: encryption technology, P2P network technology, distributed storage technology, consensus mechanism, and smart contracts.

Essentially: it is a shared database, and the data or information stored in it has the characteristics of "unforgeable", "full traces", "traceable", "open and transparent" and "collectively maintained". ” and other characteristics. Based on these characteristics, blockchain technology has laid a solid foundation for "trust and sales" and created a reliable "cooperation" mechanism. Yunchun has broad application prospects.

2. Openness.

In addition to the encryption of private information of all parties to the transaction, the blockchain data is open to everyone and provides a flexible script code system. The entire system information is highly transparent and within the rules specified by the system. Nodes cannot deceive each other.

3. Autonomy.

Consensus technology, smart contracts.

⑨ What is blockchain

In the simplest terms, blockchain is a distributed ledger.

To understand what this means, we first have to look at its opposite: a centralized ledger. Because blockchain technology started with finance, we will also introduce it below using banks as an example.

The following is our process of using bank debit card transactions:

You can swipe your card to purchase goods in stores.

The merchant sends a statement to your bank for the agreed upon amount.

Your bank will verify that you may have authorized the purchase.

The bank sends the money to the merchant.

Finally, the bank records this information in its ledger.

There’s a lot of technology involved here, but that’s basically it. The last step is important - the bank records all transactions made by the customer. This ledger goes all the way back to the first transaction the bank made.

This ledger is kept, maintained and regulated by the bank. You can read it in your online bank account, but you can't change it. The bank has complete control. If it decides to make a change, there's nothing you can do about it.

Crucially, if hackers were able to access a bank’s ledger, that could cause a lot of problems. They can change the account balance to make it look like certain transactions never occurred, etc.

This is why distributed ledgers are so cool.

Blockchain Network Visualization

If a bank operates on a distributed ledger, each member of the bank will have a copy of the ledger, and whenever any member of the bank When they make a purchase, they tell every other member of the bank.

Each member will validate the transaction and add it to the ledger (the added records are called "blocks"). This has some important benefits, as there is no centralized authority that can manipulate records. Hackers accessing one ledger won't be a big problem because other ledgers can easily verify it.

On the other hand, it requires a lot of work. In short, the second system is blockchain (at least in financial scenarios).

As mentioned above, blockchain is a decentralized list of transactions. If I send Xiao Ming 2 Bitcoins, I send a message to everyone in the network saying "I am sending Xiao Ming 2 Bitcoins" and they all record the transaction.

The future of blockchain, how will it change our lives?

One thing that is important about blockchain is that it is a public resource and no one really owns it because everyone owns it.

Blockchain is not just science fiction. We don’t need to understand the mechanism behind this technology, but you do need to understand that it may completely change our lives in the next 20 years.

This may sound bold, but remember, 20 years ago we were browsing the Internet on Netscape, using state-of-the-art Motorola flip phones, and buying our first DVD players. At that time, if we fantasized about electricIf you can hold a brain in your hand and you can buy a car, make payments, and watch movies on it, it will definitely be considered a fantasy.

Although the impact of blockchain may not be as obvious as the Internet, nor as tangible as mobile phones, blockchain will effectively solve many worries in daily life. Such as intermediaries cheating people, transaction delays, etc. In our current lives, middlemen are everywhere and we take them for granted as a part of life. If one day these intermediaries cease to exist, you will find that the world will become a different place.

Imagine that by 2040, blockchain may become a mature and widely used technology. When one day you can't live without the blockchain just like you can't live without the Internet now, you will be surprised to find that this decentralized accounting technology has simplified the complexity and become a part of your lifestyle