白话区块链pdf百度云,区块链视频教程百度云
关键词一：区块链技术
区块链技术是一种分布式的记账技术，它可以记录所有的交易，并且可以在不同的节点中进行安全的数据共享。它的主要特点是去中心化，安全性强，可靠性高，而且可以记录每一笔交易的历史记录。区块链技术的发展，使得许多传统的金融机构和技术服务商都正在投资和研究区块链技术，以期能够更好地利用它来改善自身的业务流程和服务。关键词二：比特币
比特币是一种去中心化的数字货币，它是一种基于区块链技术的虚拟货币，可以在网络上进行安全可靠的转账。比特币的发行量是有限的，比特币的价格会受到市场供求的影响，而且比特币的交易过程是安全可靠的，不需要任何中介机构。比特币的发展，使得许多传统的金融机构和技术服务商都正在投资和研究区块链技术，以期能够更好地利用它来改善自身的业务流程和服务。关键词三：智能合约
智能合约是一种基于区块链技术的自动执行的合约，它可以用来执行复杂的金融交易，而无需人为介入。智能合约可以确保双方的权利和义务，并且可以自动执行，从而节省了时间和成本。智能合约也可以用来构建去中心化的应用程序，从而使得数据的安全性得到更好的保护，同时也可以更好地保护用户的隐私。智能合约的发展，使得许多传统的金融机构和技术服务商都正在投资和研究区块链技术，以期能够更好地利用它来改善自身的业务流程和服务。今天，我们要聊的是区块链技术、比特币和智能合约，它们都是基于区块链技术的重要应用，越来越多的金融机构和技术服务商都正在投资和研究区块链技术，以期能够更好地利用它来改善自身的业务流程和服务。首先，让我们介绍一下区块链技术。区块链技术是一种分布式的记账技术，它可以记录所有的交易，并且可以在不同的节点中进行安全的数据共享。它的主要特点是去中心化，安全性强，可靠性高，而且可以记录每一笔交易的历史记录。
其次，我们要介绍的是比特币。比特币是一种去中心化的数字货币，它是一种基于区块链技术的虚拟货币，可以在网络上进行安全可靠的转账。比特币的发行量是有限的，比特币的价格会受到市场供求的影响，而且比特币的交易过程是安全可靠的，不需要任何中介机构。
最后，我们要介绍的是智能合约。智能合约是一种基于区块链技术的自动执行的合约，它可以用来执行复杂的金融交易，而无需人为介入。智能合约可以确保双方的权利和义务，并且可以自动执行，从而节省了时间和成本。智能合约也可以用来构建去中心化的应用程序，从而使得数据的安全性得到更好的保护，同时也可以更好地保护用户的隐私。
总之，区块链技术、比特币和智能合约是基于区块链技术的重要应用，它们的发展和使用，将会给金融机构和技术服务商带来更多的机遇，也会给消费者带来更多的便利。请查看相关英文文档
1. Please download the full text of "Blockchain in Vernacular" for free from Baidu network disk resources, thank you~
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?pwd=3yps Extraction code: 3ypsIntroduction: This book was written by Vitalik Buterin, founder and chief scientist of Ethereum Recognized and recommended, it is one of the few books that systematically introduces Ethereum, covering architecture, core concepts, deployment, smart contract practice, etc., and covers many hot topics that readers are concerned about.
Chapter 1~2 introduces the basic principles, architecture, core concepts, etc. of blockchain to have an overall understanding of blockchain.
2. Explain blockchain in vernacular
img src=' https://p26 . toutiaoimg.com/large/39b 70000088 e 51 B3 c 258 '/
Recently, various ICO financial scams have been blocked in China, but this does not hinder the vigorous development of blockchain technology. After all, technology is innocent and can bring benefits to people. As for how to use it, it depends on people to operate it. If the operation is good, you can recommend development. If the operation is not good, it is like the major ICO projects. Find some knowledge for Internet celebrities to conduct so-called illegal fund-raising and financial fraud.
After talking for a long time, what is blockchain? When it comes to blockchain, the first thing that comes to mind for many people is Bitcoin. We need to solve a problem. Bitcoin is a blockchain, but blockchain is not Bitcoin. Simply put, blockchain is distributed ledger technology (DLT), not a token. It has many characteristics, such as decentralization, traceability, and difficulty in tampering.
(1) Blockchain is a distributed database
First of all, this is a decentralized distributed architecture system. Therefore, having only one central server or node is not called a blockchain. For example, if you go to Taobao to buy a mobile phone, you and the seller are strangers and have no basis for trust. If you give the money to the seller first, the seller may block you by not delivering the goods, and then your mobile phone money will be gone. If the seller ships first, do you pay? It is possible that you do not pay the seller after receiving the goods, and one party may lose money anyway. At this time, a third-party guarantee is needed to solve the trust problem. Just like Alipay now, you give money to Alipay and the seller will deliver the goods. When you receive the goods, the seller will receive the money.
The above example is a centralized system because all guarantee work is handled by Bora, a third-party payment company. Suppose one day Alipay wants to tamper with data, neither buyers nor sellers can do anything because all authority is in the hands of one company.
At this time, a distributed database is needed. This third party is no longer Alipay, but thousands of monitoringmonitor. When you buy a mobile phone on Taobao, you will shout to everyone that I am going to XXX to buy a mobile phone, and I paid XXX yuan. The other person will yell like everyone else. I collected XXX’s mobile phone bill and sent it over. In this way, everyone knows about this transaction and everyone is recording this transaction, so it is useless if one or two nodes have problems or malicious behavior, because most nodes have recorded this matter.
(B) Blockchain uses encryption technology to ensure data security
There are two important points here: 1. Crypto-enabled hash function 2. Asymmetric encryption.
If you are interested in specific concepts, you can go online, but people without basic knowledge may not be able to understand it, because these two points are too professional. In fact, if you only know the use of blockchain, you don’t need to have an in-depth understanding of it. It is also a technical concept. All you need to know is that blockchain relies on these technical points to ensure data security and is not easily tampered with. Of course, many people say that these two points can guarantee 100% non-tampering. I want to be a little conservative here. As an author who works in the security industry, I have always been skeptical about 100% security, so it may be more appropriate to call it difficult to be tampered with.
I will briefly introduce these two concepts and try to explain them clearly in plain English.
1. Cryptographic Hash Function
This is mainly used to verify the integrity of information. For example, I sent a message to the company leader saying that I was sick on Friday and needed to take a day off. At this time, a hash value will be generated based on the message I sent, such as: 123456. At this point, when the leader receives this message, a hash value is also generated. Because the content of the message I sent has not changed (it has not been tampered with), the hash value remains unchanged, still: 123456. This is if someone wants to tamper with this news and get sick on Friday and need to take a year off. At this time, the hash value will change, such as: 123489. That's when we learned our information had been tampered with.
2. Asymmetric encryption
It is mainly used for information encryption and authentication. It is actually two keys, one is called the public key and the other is called the private key. Public key encryption, private key decryption.
A public key is a key that everyone has. You own it, I own it. We can all encrypt with this key, but when decrypting it must be decrypted with my private key. If you don't have my private key, you can't decrypt it.
(C) The blockchain uses a consensus algorithm to reach consensus on new data.
The role of the consensus algorithm is to enable all nodes to reach a consensus on the new block. In other words, everyone must approve the new block.
For a centralized deployment system, this is simple, everything is controlled by the center, but in the distributed system of the blockchain, it is very complicated. For example, there are three nodes. A said he bought a mobile phone from XXX store and paid for it, B said he didn’t pay, and C said he didn’t pay enough. Then who do you listen to? What's more, blockchain technology is not as simple as three nodes, but a huge distributed system.
This is when a solution is needed. There is a corresponding problem in computer science called the "Byzantine Universal Problem" or "Byzantine Fault Tolerance""(BFT). This question was raised not because of Bitcoin, but because of a special background.
Early aircraft had three independent control systems. Why are three independent control systems needed? For example, in an emergency , there is an airplane on the opposite side. How to judge whether you should hide? If there is only one system, there is no choice, which is equivalent to centralized deployment. If the system is broken, you will die. What should you do if one of the two systems is broken? Good to say Hide, bad ones say not to hide, the computer cannot judge the final result. Therefore, three independent systems are needed to support it, and the probability of two total failures is still very small. But this only considers the damage. What should I do if there is a malicious system? Three Is it enough? The answer is no, we need four systems to maintain consensus.
The use of blockchain is also similar, because it is supported by a huge number of nodes, and each node is an independent system without interfering with each other. . We can assume that the number of failed nodes and malicious nodes is limited, so it will not cause abnormal consistency of data.
Related Q&A: What is blockchain? What is it used for?
Blockchain is a new The computing paradigm and distributed infrastructure use fast chain data structures, distributed node consensus algorithms, cryptography methods and smart contracts based on automated script codes to produce, verify, store and transmit data. It can also be said that the blockchain is a A distributed ledger technology that can provide a decentralized trust mechanism in a non-trust environment, allowing multiple participants to conduct secure and trustworthy transactions without intermediaries.
The core advantage of blockchain technology is Decentralization can realize point-to-point transactions, coordination and collaboration based on decentralized credit in a distributed system where nodes do not need to trust each other through the use of data encryption, timestamps, distributed consensus and economic incentives, thus providing a solution center It provides solutions to the common problems of high cost, low efficiency and insecure data storage in international institutions.
The application areas of blockchain include digital currency, certificates, finance, anti-counterfeiting and traceability, privacy protection, supply chain, entertainment Wait, with the popularity of blockchain and Bitcoin, many related top domain names have been registered, which has had a relatively large impact on the domain name industry.
Related Q&A: Can you explain it to me in an easy-to-understand way? What is blockchain?
Er Gazi is my childhood friend, and we were naked in Hegou. Later, I came to the city to go to school and work, and lived the life of a drifter in the north; he farmed at home and also did some small business. , now he has two children and a safe life. He envies me for my so-called "seen the world", and I envy his simple life without the pressure of mortgage loans. We have completely different and mutually enviable lives??
That day, Gazi was in I contacted me on WeChat and asked, "What is blockchain?" "I was stunned for a moment. How could this idiot care about such avant-garde words? I pretended to be calm and prepared to talk about the technical principles bit by bit, but I could see that idiot's clouds and fog through the phone screen. Confused expression. How to explain "what is blockchain" to someone with a little bit of Internet concept and technical foundation? This seems to be a very difficult problem??
Village Entrance ShopDeducing the core of blockchain (picture quoted from the Internet)
The core essence of blockchain is "decentralization", and almost all operating modes of blockchain operate around the concept of "decentralization". Once you understand what "decentralization" is, you can basically explain the question "what is a blockchain?" For Erga, of course, he must perform a version that he can understand.
“I said, Gazi, are you still open that canteen at the east end of the village?” Gazi answered yes. I decided to use this canteen as an example to explain the actual use of blockchain in modern business and financial models. Scenario, so that he can better understand what blockchain is.
"Are there still many villagers who take credit now? By the end of the year, some of the accounts will not be remembered clearly, and there are still many defaulters or those who refuse to accept their accounts?" At this point, Ergazi got emotional and kept complaining. Nowadays, people's hearts are not as old as before, and business is difficult to do!
"In the past, the operation model of your canteen was a typical centralized one. You granted credit to the villagers and allowed them to take accounts on credit. All accounting was done directly through you and our villagers. You were the center of all accounting affairs." Ergazi said I understand, let me continue.
I said: "If you fail one day, then all the accounts will become dead debts? It will be difficult to get back the IOUs written in black and white, let alone those who remember the accounts verbally, but the block The decentralization of the chain can solve this problem very well. As long as the earth still exists, the blockchain will remember that every account will exist forever." Erga became more energetic after hearing this.
The essence of blockchain is “decentralization”
“The essence of blockchain is decentralization. Once someone takes credit from you, all the neighbors in the village will help you keep accounts. Because of the accounting There are many nodes, and it is neither easy to make mistakes nor others to default on the debt, so everyone reaches a consensus. If someone maliciously fails to pay back the debt, the whole village will know his character, and no one will be willing to have financial transactions with him in the future? ?"
At this point, Gazi was obviously a little excited. It seemed that he was really worried about the credit issue. Seeing that Gazi was interested, I felt a little sense of accomplishment and continued: "Of course, the above is just an analogy. In fact, the blockchain does not really allow the villagers to get paper and pen to help you keep accounts, but through the Internet It was completed by networking with the computer."
At this time, Gazi was a little confused and asked: "Then everyone in the village knows what others bought from me, so who would buy anything from me? It's really a bit weird. There is no privacy. And you don’t have time to keep accounts here. Last year’s accounts are said to be this year’s. What if you keep delaying it?”
“Okay, Gazi, you are on to the point of asking this question.” It seems that Gazi is not stupid at all, and is still very smart in doing business. I continued to explain: "So, the recording and transmission of this information are all done through encryption. What you see is a string of numbers and English, and each account has a timestamp to record the time it occurred. , can't be relied on."
Gazi had another question: "Is it possible that the people who owe the debt have a good relationship with the villagers, and they join forces to tamper with the accounting? Then we can sayI can’t explain clearly??”
“Gazi, that’s all you have, haha. "I understood Gazi's concerns and continued to explain: "The mechanism of the blockchain requires more than 51% of people to agree to tamper with a bill. Everyone has a degree of closeness and distance between them, and it is impossible for everyone to favor the same person. If it were a computer, more than half of the computers on the entire network would need to recalculate. This project would be so huge that it would be almost impossible to complete."
In this way, through the actual situation of the canteen and combined with some scenes in life, Gazi understood What is in the blockchain: decentralization, distributed accounting, consensus mechanism, encryption mechanism, timestamp, and the characteristics of being difficult to tamper with.
Ergazi was silent for a moment, seeming to be digesting the example I just gave him. I don’t know how much he can understand the example. Not long after, he sent me a voice message on WeChat: “What does blockchain mean? In the past, when I bought goods online and paid, I had to go through Jack Ma’s house. If there is a blockchain, can we directly trade with the seller? Anyway, the accounting is very safe. "
"Okay, Gazi, it's really clear at first glance. Blockchain is essentially a decentralized distributed ledger data cloud. Of course, it can be understood according to your understanding. "I'm very happy that Gazi can roughly appreciate the true charm of the blockchain. Fortunately, my words have not been in vain.
What is Bitcoin? (Picture quoted from the Internet)
"Then Bitcoin What is this thing again? What does it have to do with blockchain? "Gazi asked.
I thought about it briefly and decided to continue to explain to Gazi with the story of the canteen: "In your canteen, the villagers can't keep accounts for you for free all day long. Do you have to carry some during the holidays? This is the reward mechanism of the blockchain, and everyone who participates in bookkeeping may receive rewards. "
"Then what are the rewards based on? There has to be a rule, right? "Gazi asked very puzzled.
I explained: "Zhang San went to your store to borrow a pack of cigarettes on credit, but Li Si knew about it first and kept an account for you first, and then others knew about it. Keep accounts, then Li Si can get a small red flower as a reward ~ This small red flower is generated by the blockchain system and has no value in itself, so you do not need to pay any cost for this small red flower??"< p>“Can Bitcoin be spent as money? How is it different from the banknotes we usually spend? "Gazi continued to ask.
"Bitcoin is a digital encrypted virtual currency. In principle, it has no value itself like our banknotes. However, banknotes have a credit guarantee from the state, so they have value. Bitcoin is the value formed by consensus among Bitcoin network users, and it has tradable properties, so it can be used to carry value. "What is said here is a bit profound. I don't know if I can understand it.
I continued to explain: "Banknotes can be printed infinitely. If more are printed, inflation will occur. When we were young, popsicles worth 1 cent were very good. , now you can’t eat with 1 yuan. Of course, there are many factors that affect inflation. The number of Bitcoins is fixed, etc., there is no infinitePossibility of over-delivery. However, different people have different judgments on their value, and coupled with the influence of supply and demand and investor sentiment, their prices are always fluctuating. ”
What is the difference between Bitcoin price fluctuations and stocks?
“So is speculating in Bitcoin just like speculating in stocks? Can you understand it this way? "Gazi seems to know a lot.
"In fact, there are some similarities, but there are also big differences. "I continued Gazi's topic: "The price of stocks always fluctuates around the valuation of companies, and there is government supervision in the stock market. Bitcoin itself has no value. It is priced entirely based on supply and demand and player valuations. It grows wildly without any government supervision. Therefore, it may have higher risks and higher returns than stocks. "
In the end, Gazi revealed the real purpose of today. He asked me: "Can I invest in blockchain projects? "
Gazi is a typical example of those who don't go to the Three Treasures Hall for anything. Although there is a large circle of people who are involved in both blockchain and Bitcoin, in fact, what he really cares about is "blockchain project investment" Is it reliable? "As soon as these words came out, I was extremely shocked. Now the so-called blockchain investment projects have actually reached fourth- and sixth-tier cities and small towns!
As of now, there are only three types of blockchain investments. Situation: Mining, currency speculation, so-called blockchain projects.
Mining and currency speculation are still the main lines of the blockchain (pictures quoted from the Internet)
The so-called mining means mining by purchasing mining machines, etc. Equipment, mine virtual currency, and then sell and realize it to get returns. You can install the mining machine yourself, or you can find a mining pool to host it, but the core keys to profitability are "computing power" and "power consumption" as well as Investment in equipment. With the sharp drop in the price of virtual currencies and the increase in mining difficulty, the current mining returns of many currencies are very unsatisfactory. Mining is obviously only a very small number of investors who understand technology can play successfully. I My childhood friend Gazi obviously can’t play with it.
As for “coin speculation”, I have just introduced some differences between Bitcoin and stocks in the previous section. In principle, although they are both “buy low and sell high” operations , but there is a huge difference. Ordinary investors cannot determine the value of a virtual currency itself, and the price is determined entirely by the relationship between supply and demand, which is somewhat similar to what we often call "market makers." On the other hand, the virtual currency trading market is extremely Irregularities, theft and hacker attacks often occur, and the risk factor is much greater than investing in stocks. For the safety of my friends' funds, I am one of the ten thousand people who disagrees with "coin speculation"!
"September 4th" It is illegal to issue virtual currencies
In fact, in my opinion, most of the so-called investment projects in the market are essentially "illegal fund-raising" and "pyramid schemes." Some so-called blockchain investment projects use various The packaging and inflammatory rhetoric attract investors into the circle, and then create the illusion of profitability by building a software and hardware ecosystem of issuing new coins + mining + currency speculation, and then finally run away. Our country's laws clearly stipulate that the issuance of virtual currencies is illegal.
Illegal pyramid schemes now wear the cloak of blockchain(Picture quoted from the Internet)
How to identify some MLM activities under the guise of blockchain? In fact, these pyramid schemes are also so-called Ponzi schemes, what we people often call "empty gloves." These so-called "direct sales" or "marketing" activities often have no actual products to circulate, and rely more on developing "downline" to ensure top-level profits. With the rise of the concept of blockchain, this MLM model has shown an intensification trend, and it even deceives people under the banner of state support for new technologies.
When Gazi asked, “Can blockchain projects be invested in?”, I realized the seriousness of the problem. Gazi is a typical young man from a small town, and his pursuit is his wife and children. But when faced with the attraction of "wealth", people often do inappropriate things. Mining and currency speculation are simply not suitable for him, let alone blockchain investment projects that are most likely "illegal financing" or "illegal pyramid schemes"!
I quickly dialed Gazi’s phone number and conducted the above analysis carefully??
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Introduction: Wang Feng, founder of Mars Finance and Consensus Lab, discussed blockchain technology, application, investment and entrepreneurship with Ethereum founder V God, Chairman of Alibaba Group Academic Committee Zeng Ming, Bitmain co-founder Wu Jihan, Binance founder Zhao Changpeng, 360 Chairman Zhou Hongyi and other 15 people who have had an important impact in the blockchain field launched an enlightening peak dialogue. Blockchain technology enthusiasts, Internet practitioners, and crypto-asset investors can learn about the technological development context and market growth potential of this new species, blockchain.
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Introduction: White Paper Systematically introduced the rise of blockchain, core technologies and principles and mechanisms, domestic and foreign industry development status and typical application scenarios, summarized Huawei's research results on blockchain over the years, and conducted a review of Huawei Cloud Blockchain Service BCS Detailed introduction.
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"Vernacular Blockchain" (Jiang Yong ) E-book network disk download free online reading
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Book title: Vernacular Blockchain
Author: Jiang Yong
Translated Author: Wen Yan
Douban score: 7.6
Publisher: Machinery Industry Press
Publication year: 2017-10-1
Number of pages: 236
Content introduction:
From the shallower to the deeper: starting from Bitcoin, to the bones (cryptographic algorithm) and soul (consensus algorithm) of blockchain technology, and then From the introduction of the currently well-known blockchain framework to the final construction of a micro-blockchain system (micro-chain) from scratch, proceed step by step.
Multiple pictures and tables: various examples and charts, using flowcharts and schematics to introduce the source code compilation of Bitcoin, the development and deployment of Ethereum smart contracts, the configuration and use of Hyperledger Fabric, and the micro-simulation of Bitcoin. The design and implementation of the blockchain system are vivid and intuitive.
Vernacular: Through life-like examples such as "Village Account Bookkeeping" and "Baihua Village Election Accounting", it avoids understanding barriers and boring reading due to multiple technology combinations and new concepts.
About the author:
Jiang Yong, director of the information technology development department of a group enterprise. 12 years of experience in software design and development, focusing on distributed system design. He has been exposed to the underlying technology of Bitcoin since 2012. He is familiar with the implementation of blockchain technologies such as Bitcoin, Ethereum, and Hyperledger, and has conducted source code level principle research.
Wen Yan (Qin Wenyan), general manager of the blockchain division of a well-known private equity investment bank, is the organizer and participant of multiple expert committees and technical white papers on the underlying technology architecture of blockchain with its own intellectual property rights. Vice president of the Blockchain Research Institute of a central enterprise fund company in Beijing. Famous DB2DBA and big data expert.
Jiawen, a well-known MOOC website architect, has long served as the manager and technical architect of Bell Canada’s online marketing department and big data product department. Currently engaged in the design and development of quantitative trading systems based on blockchain.
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Introduction: Blockchain is born out of The distributed technology of the Bitcoin protocol is also a perfect credit system. The principles and characteristics of blockchain determine that it has an inherent mission to reconstruct the future shape of various industries including finance, and some even place their hopes on it to create a more ideal world. Since many people’s understanding of blockchain is still in the “coin era”, “Blockchain 2.0” aims to2.0, the latest concept, truly presents the cause and essence of blockchain, explains the principles and mysteries of blockchain technology in a popular way, and fully describes the applications and trends of blockchain. "Blockchain 2.0" contains real cases, rigorous deductions, and original designs. It is the most innovative and practical information for relevant decision-makers, practitioners, academic researchers, and the general public.
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Introduction: The development of Internet technology to this day has entered a new era: from information interconnection to value interconnection, and to achieve this key transformation requires An underlying value Internet technology that can be applied globally. In this context, blockchain technology has become the most practical disruptive technology in the value Internet era with its characteristics of "security, openness, transparency, data tamper-proof, openness, anonymity, and decentralization".
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Introduction: This book describes the panoramic view The cutting-edge technology of the Internet - Blockchain, from the perspective of the origin of Blockchain, the development status of Blockchain in various countries around the world, the four core technologies of Blockchain, and the development status of digital currency based on the underlying technology of Blockchain. Describe it. In addition, in order to better understand blockchain, this book describes the application of blockchain in seven fields including digital currency, finance, Internet of Things, big data, medical, education, and notarization.
Blockchain is a technological revolution. In the near future, we will see direct competition between blockchain and traditional industries. And this is competition at different levels. It has become an inevitable trend for traditional industries to be replaced by new technologies. Therefore, before anything happens, it is crucial to pay attention to, participate in, and apply blockchain.
By reading this book, readers only need a week to understand what blockchain is and what it can do, and understand the value of blockchain in various fields.
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Introduction: Jointly recommended by blockchain experts and co-written by senior blockchain practitioners, it comprehensively reveals the secrets of blockchain technology from a technical perspective. Covers basic concepts, architecture, underlying algorithms, application development, typical blockchain solutions, frequently asked questions and other technologies and applications that readers are most concerned about.
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"2019 Tencent Blockchain White Paper" Download the latest full set of network disk pdf:
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Introduction: 2019 10 On March 19, Tencent Research Institute, together with Tencent FIT, Tencent Cloud, Tencent Legal Innovation Center and Tencent Financial Line, jointly held Tencent's first digital transformation strategy meeting: "The Road to Breakthrough in Industrial Blockchain". At the meeting, "2019 Tencent Blockchain White Paper. The "2019 Tencent Blockchain White Paper" analyzes the development trends of the blockchain industry in 2019, puts forward the concept and thinking of industrial blockchain, and announces the key layout of Tencent Blockchain and Tencent's integration of blockchain and industry. practices and results.
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