什么是区块链技术的前世

区块链技术是一种分布式记录技术，它可以记录不可篡改的数据，并且可以实现跨境转移，从而实现数据的安全交换。在探索区块链技术的前世，我们将介绍三个重要的关键词：去中心化，共识机制和智能合约。

去中心化是区块链技术的基础，它指的是没有中央服务器或组织的控制，而是由网络中的节点来实现数据存储和数据交换。这种技术使得数据能够在不受任何中央机构控制的情况下安全的传输，从而实现数据的安全性和可靠性。

共识机制是区块链技术的核心，它是一种分布式的系统，可以实现网络中的所有节点之间的可靠沟通。它的主要原理是，所有节点都必须遵守网络中的规则，并且必须对网络中的数据进行验证，以确保数据的一致性和完整性。

智能合约是一种可以自动执行的计算机程序，它可以根据程序中的指令自动执行指定的任务。它可以在区块链网络中被用来自动执行合同，从而实现无需人工干预的交易。此外，它还可以被用来跟踪资产的流动，并实现资产的安全交换。

从上面的介绍可以看出，去中心化、共识机制和智能合约是区块链技术前世的三个重要关键词。它们的结合，使得区块链技术能够实现数据的安全交换，从而为金融行业带来了新的发展机遇。

Ⅰ Blockchain Encyclopedia: The Past and Present of Blockchain - 3.0 Era

The representative of the blockchain 1.0 era is Bitcoin, and the representative of the 2.0 era is Ethereum , and the troubled times of various copycats and air coins. Blockchain 3.0 is the era of consumer-level blockchain that has truly entered commercial and physical applications after the troubled times. The typical symbol is the emergence of tokens. The pass has brought about changes in traditional business models and production relations. The pass has moved from the digital world to the real economy and has begun to seek practical applications in various industries.

The pass has three elements, one of which is indispensable.

Pass: The pass can be circulated on a large scale in a network and can be verified anytime and anywhere; Certificate: As a proof of digital rights and interests, the pass must be a certificate of rights and interests that exists in digital form, and it must represent It is a right, an inherent and intrinsic value; value: the token must have economic value.

In this way, the meaning of "token economy" is not difficult to understand. The token economy is a large-scale group collaboration based on tokens. It maximizes the role of tokens, allows every role that creates value to share value fairly, fully mobilizes participation motivation, and forms a self-organizing form.

Major changes in the blockchain 3.0 era

The token economy has laid the theoretical basis and technical support for the large-scale application of blockchain, and the future world will also be transformed by it. Large-scale changes include:

1. Fragmented investment, fragmented income, subverting the traditional way of doing business on the Internet. In the traditional Internet era, it was impossible for ordinary people to participate in the investment of a company, but the emergence of blockchain allows ordinary people to make fragmented investments in a large asset. Assuming that Alibaba originally adopted blockchain for fragmented investment, then all fragmented shareholders who invested in Alibaba would be able to reap a return on investment that has increased thousands of times today!

2. Break the money-burning model of the Internet and make everyone a winner. The free model of the traditional Internet is essentially to obtain a large number of users through free products to form monopolies and barriers, and then make profits through advertising and value-added services on this basis. In the blockchain 3.0 era, project income is redistributed by issuing tokens to attract more early investors and community users. As the number of users holding tokens increases, the value of the tokens will become higher and higher, and community users, investors, and projects can all benefit from it. In this way, the money-burning model of providing free services in the early days of the traditional Internet can also be improved, and everyone will become a winner.

3. Breaking down the traditional corporate organizational hierarchy, self-organization may become a future trend. In the blockchain 3.0 era, through the establishment of distribution and collaboration mechanisms through smart contracts, it can be more efficient than enterprises.more acurrate. All token owners will naturally form a community. Everyone has the same goal - "to promote the development of the project and make it a success". They are all members of the community, contribute to the community, promote the value-added of the token, and thereby gain benefits together. profit. From a philosophical perspective, this new self-organizing community of freedom, independence, and equality must be the future trend. Gojoy blockchain e-commerce is a self-organized community of blockchain. Every consumer is a token owner and a fragmented investor, so he is very happy to co-create and build Gojoy value.

Therefore, we can look forward to the era of great development of the blockchain 3.0 token economy, and the existing ones may be subverted. What we need to be prepared for is to work hard to embrace the blockchain. If you want to seize the trend of blockchain and understand how to transform into blockchain, please leave a message to communicate and we will take you to learn the blockchain professional certification course.

II What is the development history of blockchain technology?

Which came first, Bitcoin or blockchain? When Bitcoin was first born, there was no concept of "blockchain". People used bitcoin (lowercase b) to represent Bitcoin, and Bitcoin (capital B) to represent its underlying technology, which is what we now call blockchain technology. In 2015, after The Economist published its cover article "Blockchain Technology Reshaping the World," blockchain technology set off a financial technology craze around the world. Major financial institutions and banks around the world rushed to study blockchain technology. In 2016 alone, billions of dollars were invested in blockchain-related companies. In September 2017, the Chinese government website (www.gov.cn) published an article "my country's blockchain industry is expected to be at the forefront of the world", publicly supporting the development of blockchain technology and popularizing blockchain technology to 1.3 billion Chinese people . The application of blockchain in real economic fields such as finance, insurance, retail, and notarization has begun to accelerate.

Ⅲ What is blockchain technology? What exactly is blockchain?

1. The so-called blockchain technology, referred to as BT (Blockchain technology), is also called Distributed ledger technology is an Internet database technology that is characterized by decentralization, openness and transparency, allowing everyone to participate in database records.

Explain in layman’s terms: If we assume that the database is a ledger, reading and writing the database can be regarded as an accounting behavior. The principle of blockchain technology is to find out the accounting information within a period of time. The fastest and best person will keep accounts, and then send this page of information to everyone else in the entire system.

2. Blockchain is a new application model of computer technologies 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. At the same time, as the underlying technology of Bitcoin, it is a series of cryptographic methods related to each other. The generated data blocks, each data block contains aThe information of batches of Bitcoin network transactions is used to verify the validity of its information (anti-counterfeiting) and generate the next block.

(3) What is the past life of blockchain technology Extended reading:

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

The incentive layer integrates economic factors into the blockchain technology system, mainly including the issuance mechanism and distribution mechanism of economic incentives; the contract layer mainly encapsulates various scripts, algorithms and smart contracts, and is the The basis of the chain's programmable features; the application layer encapsulates various application scenarios and cases of the blockchain.

IV What is Blockchain Technology What is Blockchain in a Popular Explanation

Blockchain has been at the forefront since the end of October.

What is blockchain technology

Although blockchain has been around for more than ten years, many people still don’t know much about this technology.

Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithms. From an application perspective, blockchain is a distributed ledger.

So, why is the blockchain called the blockchain?

Because the blockchain itself is a series of linked blocks, these blocks are filled with transaction records. The blocks are much like the records of a database. Every time data is written, it Create 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 technology?

Simply put, blockchain has the characteristics of decentralization, openness, non-tampering, and anonymity.

1. Decentralization:

In the blockchain system, there is no center.

In the blockchain model, it is distributed accounting and storage. Each node self-verifies, transmits, and manages information. Each node is the center, which is decentralization.

2. Openness:

The blockchain system has the characteristics of openness. The data is open and anyone can query the blockchain data and data through the public interface. Develop related applications.

3. Information cannot be tampered with:

In the blockchain system, once the data is written, the tampering cannot be undone unless 51% of all data nodes are controlled. Forge a record that does not existrecord. Therefore, blockchain technology has a certain degree of security.

4. Privacy and anonymity:

The cryptography technology in the blockchain can effectively achieve identity concealment.

The identity information of each node does not need to be disclosed or verified, and information transfer can be done anonymously. It can only be accessed with the authorization of the data owner, thus ensuring data security and personal privacy.

Xiao Li lent 10,000 yuan to Xiao Wang. Xiao Li found two people in common and Xiao Bai to prove it. This accounting model is a centralized accounting model, and Xiaobai is the center.

However, a year later, when Xiao Li wanted to get the money back, Xiao Wang Shikou denied that he had lent him the money. It turned out that Xiao Wang introduced Xiao Bai's girlfriend to his company. a job.

This is the disadvantage of centralized accounting.

Xiao Li learned a lesson and gained wisdom. In the future, when someone asked him to borrow money, he said on WeChat in the village that I would lend so-and-so how much money. In this way, everyone in the village knew that Xiao Li How much did Li lend to whom?

In this way, when Xiao Li asks for debt again in the future, the other party will not deny the issue, because a consensus mechanism has been established in the minds of the people in the village: How much did you borrow from Xiao Li? .

This is the advantage of decentralized accounting.

Because after all, there are many people to testify about this transaction. If it seems to be a fraud, it will be unless more than half of the people in the village are bought. However, the price is very high.

In fact, these characteristics of the blockchain are all to solve the problem of "trust". The rich application scenarios of the blockchain are also based on the blockchain's ability to solve the problem of information asymmetry. At the same time, Blockchain also helps achieve collaborative trust and consistent action among multiple entities.

What are the applications of blockchain?

In addition to digital currency, there are many application scenarios of blockchain.

1. Medical field

Blockchain helps realize smart medical care, such as going to the hospital to see a doctor. Through the blockchain model, the patient’s medical status, cases, treatment status, etc. are all Clearly visible, saving a lot of medical resources.

2. Copyright field

Blockchain can prove the authenticity and uniqueness of the copyright of works, from the birth to the transfer of audio, video, pictures, text and other works. Can be tracked and recorded, and form tamper-proof information.

3. Logistics field

After applying blockchain in the logistics field, goods can be traced from production to consumption.

4. Food safety

Blockchain used for food safety? Through blockchain traceability, one can easily trace the past and present life of their food.

5. Securities trading

For example, traditional securities trading requires the coordination of multiple institutions to complete, while the blockchain system can independently complete one-stop transactions. This service can make securities trading simpler and faster.

However, many people have big misunderstandings about blockchain. The biggest misunderstanding is: blockchain = Bitcoin

In fact, blockchain and Bitcoin is not the same thing. Blockchain is the underlying technology of Bitcoin, and Bitcoin is the first application of blockchain.

IV What is blockchain and how was it born? What are the types of blockchain?

If you want to understand blockchain, you must first understand the basic structure of the program. Everything we see on the Internet is constructed through computer language. There are many kinds of computer languages, but the most basic characters that make up the language are codes, and blockchain technology is a way of applying codes, which is different from traditional centralization. The difference between the models is that the blockchain has the characteristics of immutability, privacy, security, and consensus.

There are many application scenarios for blockchain. The most successful case so far is Bitcoin, followed by electronic invoices, cross-border payments, etc. Based on the interoperability of data, it is impossible to With characteristics such as tampering, it can also be used to save some important data. As long as this data uses blockchain technology as the underlying technology, it can never be destroyed and will be saved forever. No person or institution has the ability to modify or delete it. In addition, there are certain intersections between blockchain payment and education, medical care, credit reporting, automobiles, transportation and other fields. It is a technology, not a certain product, so there is only one type of it, but with the application As the scene changes, its role is also different. It can be integrated with existing scenes in almost any field and then derive other applications.

VI The History of the Birth of Blockchain

Many people will be instinctively intimidated when they hear the three words "blockchain", thinking that it is unpredictable content or A technology has nothing to do with me.

2018 is the first year of blockchain technology. In the past Spring Festival, blockchain has become really popular. The "three o'clock sleepless zone" of the first blockchain community "Blockchain", articles from major media "How to introduce blockchain to seven aunts and eight aunts", novices from all walks of life are ready to enter the currency circle and try their best, etc.

We know that the Internet has connected the world over the course of decades. People don’t talk about whether the world is flat, because as long as you have a computer or a mobile phone, you are closely connected to the entire world. Elites are accustomed to calling the past Internet era the information Internet era.

With the advent of blockchain technology in 2008, unprepared humans have been drawn into the world of bits. In the future, regardless of whether you understand what blockchain technology is? Do you understand how digital virtual currency is implemented? They have all been coerced into the second era of the Internet: the era of value Internet. What you don’t know is how blockchain technology was born?

David Chaum, the "bishop" figure of cypherpunk in the 1980s and 1990s, invented the cryptographic anonymous cash system Ecash in 1990. Chaum believes that a distributed, truly digital cash system should encrypt people’s privacy.

British cryptographer Adam Baker invented Hashcash in 1997, which used the Proof of Work system. The proof-of-work system is one of the core concepts of Bitcoin.

In 1997, Harper and Stonitta proposed a protocol that uses timestamps to ensure the security of digital files. This protocol has also become one of the prototypes of the Bitcoin blockchain protocol. The biggest feature of timestamps is that when a virtual currency is traded, it is timestamped and it cannot be changed.

Cryptozoology expert Dai Wei invented B-money in 1998. B-money emphasizes point-to-point transactions and immutable transaction records, and every trader in the network keeps track of transactions.

In 2004, Hal Finney, a top developer at PGP Crypto Company, launched the electronic currency "Crypto Cash", which used a reusable proof-of-work mechanism (RPOW).

But their single invention and idea are still not enough to become a world-class virtual currency. Ecash declared bankruptcy in 1998; the proof-of-work system cannot guarantee whether digital currencies have been traded many times; the technical protocol of timestamps is only used on a small scale by the government; in the B.money system, David did not solve the problem of ledger synchronization; finally Halfini's idea is still not enough to become a world-class virtual currency.

In 2008, when all technical conditions were mature and time conditions were mature, a god-level figure was still needed to answer a question: why did the previous virtual currency pioneers fail? The name of the person who answered this question is Satoshi Nakamoto.

He believes that the most important reason for the failure of previous virtual currencies is that they all have a centralized structure, and all transaction data will be aggregated into the company's data center, which is no different from currency issued by the government. Once the company that backs the virtual currency goes bankrupt, or the central server of the general ledger is compromised by hackers, the virtual currency will face the risk of collapse. Satoshi Nakamoto optimized David Chaum's Ecash, integrating timestamps, workload proof mechanisms, and asymmetric encryptiontechnology, the structure of UTSO, and ultimately he invented Bitcoin.

It can be seen that blockchain is not a single technology, it is a collection of a series of above-mentioned technologies. Bitcoin is just a typical example of the first large-scale application of blockchain technology. In the future, blockchain technology can be applied to many fields such as financial services and social life.

Ⅶ 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 one by one, which record the communication information of each block node. The blocks are much like the records of the database. 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 someone wants to tamper with it, 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: consensus mechanism. The consensus mechanism has the characteristics of "the minority obeys the majority" and "human"Everyone is equal".

5. Anonymity: Many people think that if the blockchain is so open and transparent, do we have no privacy? In fact, no, although in the blockchain Transaction information is open and transparent, but 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 income and expenses of the family.

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 her account book, she found something was wrong. Logically speaking, in addition to some money saved in banks and financial management, The whereabouts of the family's daily consumption money are all in this account book, but no matter how you look at it, it is wrong. Some consumption is clearly not recorded, but it is recorded.

Later, my father took the initiative to confess, saying that it was I 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 something happened at home, When there is a transaction or consumption, my mother will shout, "It's accounting," and everyone will record the transaction in their own ledger. This is the decentralized accounting model, everyone is the center, and everyone has a ledger in their hands. .

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 solves the problem of central accounting very well. To eliminate the disadvantages of accounting, it is very difficult for dad to tamper with the ledger.

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 get money, he has to change the ledger, but just tampering with his own ledger is not enough. He has to change the ledgers of three people, including himself. And this is undoubtedly more difficult than climbing to the sky.

So, many times my father had the idea of ​​smoking, but due to the current situation, he had to give up the idea.

Are blockchain and Bitcoin the same thing?
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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.
< br /> In 2008, Satoshi Nakamoto first proposed the concept of blockchain. In the following years, it became a core component of the electronic currency Bitcoin, serving as a public account book for all transactions. Blockchain was first applied to Bitcoin Coin.

The origin of blockchain is to solve the problem of trust, and one of the most successful applications of blockchain is digital currency. Bitcoin can be said to be the most popular blockchain so far.A successful application.

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.

VIII What is the origin of blockchain

The origin of blockchain comes from Satoshi Nakamoto in 2008. Based on this ideological concept, the first product "Bitcoin" was born. The origins of blockchain technology are often attributed solely to the actions of a few mysterious geniuses working under the pseudonym Satoshi Nakamoto. This view of history often makes the technology seem almost magical and difficult to understand. It's even more fundamental when one understands the actual history behind the development of these systems. In this section, I will outline the most important topics from the decades of research on consensus algorithms and distributed systems that led to the creation of blockchains.