现在的这种区块链是什么,现在的区块链是不是真的

区块链是一种分布式数据库，它可以记录网络中的所有交易，并使用密码学技术来确保这些交易的安全性和完整性。它是一种分布式账本技术，可以在网络中的节点之间进行安全的数据传输。简而言之，它是一个不可篡改的数据库，可以让用户在网络上安全地进行交易。

首先，去中心化是区块链的核心概念。它是一种无需信任任何第三方的技术，可以用于在不同的节点之间安全地进行数据传输。它不需要中央服务器来管理网络，而是由一系列分布式的节点来共同维护网络。这种去中心化的特性使得区块链可以更加安全可靠，并且可以更有效地处理交易。

其次，共识机制是区块链的另一个重要概念。它是一种机制，用于确保网络中的节点能够遵守共同的规则，从而保持数据的完整性和一致性。它的工作原理是，当一个新的交易发生时，网络中的节点会进行确认，以确保交易的完整性和安全性。只有当网络中的所有节点都确认了交易，交易才会被确认，并被添加到区块链中。

最后，加密技术是区块链的另一个重要概念。它是一种密码学技术，用于加密数据，以防止未经授权的访问。它可以确保数据的安全性，并可以防止未经授权的更改。它的工作原理是，当一个新的交易发生时，网络中的节点会使用密码学技术来加密交易，以确保交易的安全性和完整性。

综上所述，现在的区块链是真的拓展，它的核心概念是去中心化，共识机制和加密技术。它可以更有效地处理交易，并确保数据的安全性和完整性。

⑴ Now that blockchain is so popular, I want to know what exactly is blockchain?

What is blockchain? Blockchain refers to a technical solution that collectively maintains a reliable database through decentralization and trustlessness. The concept of blockchain first appeared in a paper "Bitcoin: A Peer-to-Peer Electronic Cash System" written by Satoshi Nakamoto, the founder of Bitcoin, in 2008. To put it simply, blockchain is a public accounting technology that was born to solve the trust cost we incur in transactions.
What is blockchain? Blockchain technology is a way for everyone to participate in accounting. There is a database behind all systems. You can think of the database as a big ledger. Then who will keep this ledger becomes very important. Currently, whoever owns the system keeps the accounts. Tencent keeps the accounts of WeChat, and Alibaba keeps the accounts of Taobao. But now in the blockchain system, everyone in the system has the opportunity to participate in accounting. If there are any data changes within a certain period of time, everyone in the system can do accounting. The system will judge the person who has the fastest and best accounting during this period, write his recorded content into the ledger, and record this Within a period of time, the contents of the ledger are sent to all other people in the system for backup. In this way, everyone in the system has a complete ledger. In this way, we call it blockchain technology.
What is blockchain? For example, in our daily online shopping, the money paid after selecting the goods and placing an order will first be sent to the third-party payment platform. After the seller delivers the goods to the buyer and confirms receipt, the third-party payment platform will send the money to the seller. account.
When a transaction occurs between a buyer and a seller, the system will publish the transaction information between them in the form of broadcast. The person who receives this message will record the transaction after confirming that the information is correct, that is, the person who receives the message has made a data backup for this transaction.
For example, if Zhang Ergou buys an inflatable doll online, the system will hold a loudspeaker and shout loudly in the village: "Zhang Ergou bought an inflatable doll." After the "villagers" heard this broadcast and confirmed that it was correct, they took out their notebooks and wrote it down. Zhang Ergou bought an inflatable doll. The recorded information here is like a data backup for this transaction. Going back to today's online shopping, if there is a problem with Zhang Ergou's order and the Alipay system fails to record the transaction, then Li Goudan's money will be wasted. On the blockchain, if there is a problem with the order, because the early system used the loudspeaker to broadcast everywhere that Zhang Ergou bought the inflatable doll, so countless people recorded the transaction information, there will be no system failure that cannot be recorded. Transaction record status.
What is blockchain? Blockchain technology is currently very popular, especially in the financial world. Ant Financial, LeTV Finance, Wanda, Ping An, Minsheng, etc. have successively tested blockchain projects, and European crowdfunding has taken the lead in using blockchain. At the forefront of technology.
Blockchain is a large-scale, decentralized economic organization model implemented by a set of technologies.
Bitcoin is a practical embodiment of blockchain technology, which is more accurate than the former.
In fact, whether it is blockchain or Bitcoin, everyone is more concerned about the currency itself, which currency is more profitable, and how to join it.
What is blockchain? Blockchain has attracted widespread attention because it has changed the original economic organization model in many fields. For example, in the issuance and circulation of currency, the core role of the banking system has been reduced, and the organizational methods between central banks, commercial banks and users have undergone major changes; in the Ethereum ERC20 token system, the blockchain has comprehensively changed the securities Although the organizational model among issuers, participants at all levels, and regulators brings some problems, it also improves the efficiency of securities issuance and circulation.
People are now exploring the application of blockchain in various economic fields. Essentially, they are also looking for ways to use blockchain to adjust or innovate the original economic organization methods of enterprises, industries, and regions, and to find new ways to reduce costs and increase profits. way. Regarding blockchain as an economic organization model, it can be extended downward to its implementation technology, and upward to its impact on social organization and social consciousness. It is easier to understand the complex social impact brought by blockchain.

⑵ What are the actual application scenarios of blockchain now?

The actual application scenarios of blockchain now include:

1. Traditional information sharing The pain points

Either a unified center publishes and distributes information, or regular batch reconciliation between each other (typically once a day). For time-sensitive information sharing, it is difficult to achieve real-time sharing. .

The two parties sharing information lack a mutually trusting communication method, and it is difficult to determine whether the information received was sent by the other party.

2. Blockchain + information sharing

First of all, the blockchain itself needs to maintain the data consistency of each node, and it can be said to have its own information sharing function; secondly, Real-time problems can be realized through the P2P technology of blockchain; finally, using the immutability and consensus mechanism of blockchain, a safe and reliable information sharing channel can be constructed.

Okay. You may have this question: To solve the above problem, I can build an encrypted channel myself without using blockchain technology! But I want to say that since blockchain technology can solve these problems and it is very convenient to add nodes, why not use blockchain technology before you have built a safe and reliable information sharing system?

3. Application cases

Let’s take Tencent’s own application—Public Welfare Person Searching Chain—to illustrate the value of blockchain in information sharing. Bitcoin solves the problem of trust in currency issuance and accounting. Let’s take a look at how Bitcoin solves the above two problems one by one.

The problem of spam issuance: Bitcoins can only be obtained through mining, and the total number of Bitcoins is 21 million. The problem of currency spam issuance is solved in the issuance process; Ledger modification issue: Bitcoin transactionsYiRecord solves the problem of ledger modification through chain storage and a decentralized global node network.

Chain storage can be simply understood as: the blocks that store records are connected one to another, forming a chain; the records of all blocks except the first block contain the calibration of the previous block. Verification information, changing the information of any block will cause subsequent block verification errors. Because of this correlation, other blocks cannot be inserted in the middle, so it is difficult to modify existing records.

⑶ In what fields is blockchain currently used?

1. At present, blockchain is mainly and most commonly used in the field of cryptocurrency.
2. Blockchain is the main technological innovation of Bitcoin. Bitcoin is not regulated by a central government. When one person pays another person for goods or services, the user issues instructions and verifies the transaction, eliminating the need for a third party to process or store the payment. Completed transactions are publicly recorded into blocks and eventually saved to the blockchain, where they are verified and forwarded by other Bitcoin users.
For more information about the fields in which blockchain is currently used, enter: https://m.abcgonglue.com/ask/99b9ca1615834257.html?zd to view more content

⑷ Current areas What's going on with blockchain

Blockchain is a technology that emerged to achieve decentralization. It is an application model that integrates a variety of basic Internet technologies. In essence, blockchain is actually an application model similar to the Internet protocol. The HTTP we usually enter when logging into the website is an Internet protocol. The Internet connects global networks through underlying protocols, and blockchain, an application protocol, connects network nodes distributed around the world, creating a new way of playing. In the future, more and more people will understand and accept blockchain.

⑸ How is the blockchain developing now?

In 2020, the blockchain was included in the category of "new infrastructure" by the country, and at least 7 provinces introduced blockchain support policies . In the same year, blockchain technology was gradually moving from concept to implementation, with many application scenarios blooming. "Blockchain+" various industry applications have become a symbol of the continuous maturity of blockchain.

The development status of "Blockchain+" in 2020

In 2020, the COVID-19 epidemic swept the world, and the uncertainty of world economic development increased significantly. Governments and enterprises of various countries are exploring the use of emerging technologies to reduce economic and social operating costs, improve the operating efficiency of the real economy, and further find new growth points for economic development.

At present, blockchain is cross-innovating with new technology infrastructure such as cloud computing and artificial intelligence. More and more vertical fields of the real economy are showing the development pattern of "blockchain +" and "escape from reality". The good momentum of "Towards Reality".

In order to avoid turning reality into fiction, in addition to continuing to severely crack down on speculation, we must also guide the deep integration of blockchain technology with practical application scenarios. therefore, "Blockchain +" various industrial application scenarios have become one of the inevitable trends in the development of blockchain.

According to the "Blockchain White Paper (2020)" recently released by the China Academy of Information and Communications Technology, as of October 2020, more than 262 listed companies have been involved in the blockchain field, each from insurance , real estate, commercial department stores, security equipment, packaging materials, telecommunications operations and other 39 fields. In the blockchain information service registration list released by the State Internet Information Office, there are 45 listed company blockchain projects.

Among them, finance is the most explored scenario among blockchain technology application scenarios, with specific projects implemented in subdivisions such as supply chain finance, trade finance, payment and settlement, and fund management. The white paper shows that as of November 2020, among the domestically registered blockchain information services, the number of projects in the financial (including supply chain finance) field ranks first, accounting for as high as 36%.

As the implementation of blockchain applications accelerates, "blockchain +" business has become the focus of development for Internet backbone enterprises to enter the blockchain industry. In addition to financial business, they actively deploy the Internet, traceability, Applications in supply chain & logistics, digital assets, government affairs and public services, intellectual property, law, medical and other fields.

At the same time, the industry is gradually understanding that blockchain is the basic component of trusted transactions, but this does not mean that blockchain can conquer the world. Blockchain needs to be combined with other technologies such as artificial intelligence, Internet of Things, big data, 5G, etc. to use synergy to form integrated solutions to jointly promote digital transformation.

According to relevant data, the current application of blockchain is mainly in the field of certificate storage. Blockchain has entered into how to make it better from an engineering perspective, more credible, more stable, and more scalable. Well, a stage that can accommodate more nodes. He Baohong, director of the Institute of Cloud Computing and Big Data of the China Academy of Information and Communications Technology, believes that this process will continue for some time or longer. In the next step, blockchain technology competition will shift from engineering optimization and improvement to technology ecology and business ecology.

In addition, it is understood that the blockchain industry is improving in the long term, and industry cognition has returned to rationality. With the central government's planning and guidance for the development of blockchain technology, my country's blockchain has clarified the development ideas based on the alliance chain and focusing on serving the real economy and optimizing public services, and the direction of industrial development has become clearer. At this stage, the confidence of the majority of practitioners in blockchain continues to improve, and the long-term strategic value of blockchain is generally recognized.

What is the prospect of "Blockchain+" in 2021?

As my country’s blockchain industry chain gradually improves, most blockchain companies not only focus on one aspect, but also show a trend of coordinated development in multiple fields. According to statistics, among the 801 blockchain information service registration lists released by the Cyberspace Administration of China, Beijing, Guangzhou, Shanghai, Zhejiang, Jiangsu, and Shandong are the provinces and cities with the most registered companies.

The core role of blockchain corresponding to its technical characteristics is mainly reflected in certificate storage, automated collaboration and value transfer.In terms of mobile services, as its value potential continues to be explored, application scenarios have gradually expanded from the breakthrough point of finance to the real economy, government affairs and people's livelihood and other fields.

The core value of blockchain for the real economy is to promote efficient collaboration between upstream and downstream industries and improve the efficiency of industry-finance integration. In the early stages of development, the blockchain application model mainly focused on the storage of documents, contracts, etc. At this stage, blockchain industry applications are gradually moving towards automated collaboration and value interconnection such as government data sharing, supply chain collaboration, and cross-border trade.

2020 is the warm-up for 2021. In 2021, the use of blockchain, distributed ledgers, and smart contract tools will continue to grow as it did in 2020. With the continuous deepening of blockchain technology, the foundation of the blockchain industry will become better and better, the industrial ecology will also develop rapidly, and the industrial chain will become increasingly widespread.

From the perspective of industrial structure, the blockchain industry is mainly divided into four parts: underlying technology, platform services, industrial applications, and peripheral services.

The first three parts show a relatively obvious upstream and downstream relationship. The underlying technology part provides the necessary technical products and components of the blockchain respectively. The platform service part builds an area that can run corresponding industry applications based on the underlying technology. The industrial application part of the blockchain platform mainly uses blockchain technology to develop industry applications based on the actual scenarios of various industries and realize the innovation of business collaboration models within the industry.

The peripheral services part provides supporting services to the industry, including industry organizations, market research, standard formulation, system evaluation and certification, industry media, etc., to provide impetus for the development of industrial ecology.

Among them, as far as the industrial application of blockchain is concerned: Blockchain is the innovative development result of information technology, and it is also a major booster for the reconstruction of business processes and the innovation of industrial interaction models in various industries.

Blockchain has gradually expanded from the initial digital finance to supply chain finance, product traceability and other fields. Now it has been explored and applied in government affairs, people's livelihood, industrial management and other industries, and its application scenarios are becoming increasingly rich, presenting It has shown a development trend of deep integration with other industries.

At present, domestic enterprises are focusing on the development of applications related to serving the real economy and improving government affairs and people's livelihood. Among them, supply chain finance and product traceability have accounted for half of all applications. Others, such as government affairs and people's livelihood, have become the future of manufacturers. Key layout areas are about to experience explosive growth.

After blockchain investment cooled down in 2020, the blockchain industry may begin to gradually become more rational in 2021. However, a relatively complete industrial chain and active market entities provide a good foundation for the integrated development of the blockchain industry. The blockchain industry will also show a positive development trend in terms of policy support, ecological construction, platform services, application implementation, and integrated innovation.

⑹ Blockchains that are popular now

Recommend three: 1. Bitcoin is the birthplace of blockchain technology, and the market has confidence in it. Even if the policy is unfavorable to it, it still maintains a stable growth. Once it solves the expansion problem, the price will rise.foreseeable. 2. Compared with Bitcoin, the advantage of Ethereum is that it is not troubled by policies. Although the incident caused its fork, the establishment of the Enterprise Ethereum Alliance may solve this problem. The smart contract concepts and prospects it proposed have attracted many developers to follow. 3. GTCC (Global Travel Chain) GTCC is used in transaction scenarios such as tourism shopping, travel, hotel accommodation, overseas real estate, crowdfunding, game communities, artificial intelligence, etc., solving shopping, travel, hotel accommodation, overseas real estate, crowdfunding, Game communities have problems such as high costs, transaction cycles, and high transaction risks. At the same time, the decentralized characteristics of Ethereum and the automatic execution of smart contracts can achieve a more fair, just and open consumption experience, allowing more travel consumers to have no worries. GTCC blockchain + consumer application ecology = national promotion and profit sharing! When consumers use cash or other methods to spend in the GTCC community, they can obtain the GTCC, the warrant symbol of the Global Travel Chain, as a reward. As an open platform, with the consent of the tourism chain community, any product and service provider in the tourism industry can access the chain and become a community member. Members can obtain GTCC through promotion and enjoy the dividends brought by the added value of the platform.

⑺ What is the overall development of blockchain now?

The current status of blockchain development in China

1. The industry is in a stage of rapid growth

From the industry level of blockchain, from 2016 to 2018, as large domestic IT Internet companies have deployed blockchain, start-ups have entered a blowout mode, and the scale of the blockchain industry has continued to expand. According to IDC data, the market size of China's blockchain industry has grown from US$85 million in 2017 to US$561 million in 2020, with a compound annual growth rate of 60.3%.

⑻ Blockchain is so popular now, I want to know what its future trend will be

I personally believe that the future development of blockchain will inevitably shift to mobile phones. An inevitable trend in the mobile Internet era. This is a major trend and irresistible.

So now many companies are beginning to develop mobile-based blockchain application apps. Regardless of whether they are mature or not, it is always an attempt and a keen sense of the market. From Xunlei Wanke Cloud, NetEase’s Planet, and BAT’s preparations all prove this point. Mobile blockchain applications are popping up like mushrooms after a rain.

In addition, the current blockchain has not yet brought a disruptive experience to ordinary users. In addition to the application of currency issuance, blockchain technology needs more application scenarios to prove its value. .

Its future development may be more like big data, reflecting its own value in enterprise-level applications. There is a long way to go.

⑼ Is the blockchain relatively popular at present? How to understand the blockchain?

Blockchain is not just popular. It is considered popular in China, but people who know it or understand it still don’t know it. many. But it caused a certain sensation around the world.The historical background is that Bitcoin creator Satoshi Nakamoto proposed the concept of "blockchain" in the "Bitcoin White Paper" in 2008, and founded the Bitcoin Social Network in 2009.

Several main features:

Blockchain is essentially a decentralized database. The information in our lives now is centralized. For example, when transferring money, you first transfer the money to bank A, and then bank A transfers it to bank B, or more intermediaries, and then transfers it to abroad or other places. Any information is transferred to a central station and redistributed. In the blockchain, all data is dispersed, and the interaction of data is also direct, from the starting point of the data directly to the place where it needs to be received. So data transfer is faster, more direct, and cannot be manipulated.

Why is it called blockchain? Take the Bitcoin blockchain as an example. All Bitcoin transaction information in the world will be recorded in a block every 10 minutes, and the data storage for these ten minutes is monitored by all users. The information is transparent and cannot be tampered with. When ten minutes have passed, the next block will be generated, and the new block is linked to the previous block. So if someone wants to tamper with the information of a block, he must tamper with the information of all previous blocks, which is impossible with current technology.

What is the application?

1. Think about using blockchain in enterprise applications to provide more flexible, secure and efficient business processes and distributed, independent markets. Blockchain allows asset owners to track and trade things of value, such as outstanding invoices, on a transaction “chain” that is more secure, transparent, private and self-coordinating. This capability increases the speed and flexibility of cash and asset management. For example, you are afraid of buying fake goods because one manufacturer transfers production to several middlemen, and then you buy it through the middlemen, not the manufacturer. If all data was decentralized, peer-to-peer, and transparent, then you could buy and pay directly from the manufacturer.

2. The automated market for other assets will be diversified. In essence, blockchain-based transactions can reduce the need for third-party supervision because the software itself is a controlled open architecture and is visible to all parties involved in the transaction. If a company can publish valuable information to multiple potential buyers, and its content can be trusted and authentic to all buyers, and sellers cannot resell, then there will be open and transparent competition when making purchases. environment, sellers can also get better prices.

3. Reduce business transaction friction. Managing expenses is a challenge for most organizations. But blockchain can enable companies to create self-managed networks for suppliers and partners, enabling contract automation, instant payments, tracking of cargo shipments, and visibility of the entire supply chain. For example, if a company transports perishable goods in refrigerated containers, IoT sensors on the truck might call a smart contract on the blockchain when the container temperature exceeds a certain threshold. This will make the correspondingWhen an order is cancelled, it can automatically create a new order so that a second shipment can be sent immediately, and trucks with faulty refrigeration equipment can also be sent to repairs.

4. This type of network reduces transaction errors and information omissions by reducing or eliminating human-computer interaction. And, by connecting buyers directly with sellers, transactions become faster. Manage and secure decentralized private records. Traditional industry practice has been to rely on third parties to secure their shared information databases using firewalls and restricted access. Frequent data breaches show that this approach is not ideal. A fundamental advantage of blockchain is that each individual data record or element is encrypted with the key of a blockchain member. Cybercriminals may need to obtain every key of every member to gain access to all blockchain data. This is not to say that blockchain can guarantee 100% security of all data and help reduce the possibility of large amounts of private records being exposed.

5. A logical application would be employee or student records, where employers, educational institutions and even industry accreditation bodies can add new qualifications, grades or work locations if necessary. Imagine giving employees a key that can access all of their employee records as part of a secure blockchain that encompasses human resources. Individuals can securely share their college transcripts or employment history with other companies or educational institutions without having to rely on unreliable and easily forged faxes. Trace the origin of products and ingredients. Blockchain can help ensure product quality and safety by simplifying how products and ingredients are tracked and located in use. For example, suppose an automobile manufacturer forms a quality-centric blockchain that includes parts suppliers, component assemblers, quality control suppliers, and public regulatory agencies (such as the National Highway Traffic Safety Administration). Then the recall process for defective parts will be handled faster. This realization makes perfect sense when you consider that thousands of lives are lost every year due to defective car parts.

In summary, blockchain is a chain data structure that combines data blocks in a sequential manner in chronological order, and is cryptographically guaranteed to be non-tamperable and non-tamperable. Fake distributed ledger. Broadly speaking, blockchain technology uses block chain data structures to verify and store data, uses distributed node consensus algorithms to generate and update data, uses cryptography to ensure the security of data transmission and access, and uses automated scripts to A new distributed infrastructure and computing method that uses smart contracts composed of codes to program and operate data (citation network)

The above content is half handwritten and half quoted. If you still have doubts, you can read Check out the TED talk on blockchain linked below, with Chinese subtitles. Hope this helps you

Web link