区块链技术视频讲解,2020区块链大全

区块链技术是一种重要的数字货币技术，它利用分布式账本技术，可以实现数字货币的安全交易和存储。2020区块链大全是一本收集了2020年最新的区块链技术知识的图书，它包含了从基础概念到最新技术的全部内容。

2020区块链大全涵盖了区块链技术的基础概念，比如区块链的历史、技术架构、加密算法等。它也涉及到了区块链技术的应用，包括智能合约、去中心化应用、金融科技等等。

2020区块链大全还涵盖了区块链技术的未来发展趋势，比如混合网络、跨链技术、区块链应用等。它还介绍了区块链技术的重要发展者，以及这些发展者在区块链技术领域的贡献。

总之，2020区块链大全是一本全面而深入的区块链技术知识图书，它不仅涵盖了区块链技术的基础概念，还涉及到了区块链技术的应用和未来发展趋势，是一本非常实用的区块链技术知识图书。

⑴ What is the so-called "blockchain"

It can be said that 2020 is the first year of industrial blockchain. With the continuous development of blockchain technology, the number of companies actively deploying blockchain has grown exponentially. However, blockchain is still in a very early stage of development, and the implementation of blockchain applications still requires continuous exploration.
In the past ten years or so, blockchain technology has had a wide impact on a global scale. Compared with its inception, the face of the blockchain industry has undergone earth-shaking changes.
The blockchain market in the past few years was more like the Internet before 2000. The Internet before 2000 went through a period of restlessness and experienced ups and downs. Then the big waves washed away the sand, and truly powerful companies developed. .
While participating in the Cointelegraph Chinese event, Avalanche Asia Ecology Partner Wilson said: "In 2018, the blockchain ecosystem was completely different from now. At that time, it was more conceptual. Starting last year, the district The blockchain industry has undergone great differences. More and more reliable projects have been born.”
Indeed, in addition to being initially limited to applications in the field of digital currency, blockchain technology has now gradually become the basis of different traditional industries. facility. After more than ten years of exploration and research and development, blockchain has also discovered more application scenarios that highlight its value.
The growth momentum continues, but large-scale application has not yet been achieved
It can be said that 2020 is the first year of industrial blockchain. With the continuous development of blockchain technology, the number of companies actively deploying blockchain has grown exponentially. Against the backdrop of the COVID-19 outbreak, blockchain technology has also shown its huge untapped potential.
In the past year, global blockchain companies have continued to grow, but at a slower pace. According to data from the China Academy of Information and Communications Technology's "Blockchain White Paper (2020)", as of September 2020, there are 3,709 blockchain companies in the world, mainly distributed in the United States and China, of which the United States accounts for 27%. China accounts for 24%.
Obviously, as countries around the world continue to introduce positive blockchain policies and promote blockchain technology to empower the real economy, the blockchain industry bubbles are gone and the industry has returned to rationality. More and more companies are entering the market and actively using blockchain technology to expand their business.
Even though blockchain-related companies are springing up like mushrooms after a rain, blockchain is still in a very early stage of development. From the bottom of the protocol layer, it is still very early to be mature and complete. The middleware layer may be far away from maturity, and the middleware layer may be a very important infrastructure required for the future integration of blockchain with the real world and real economy.
When these things have gradually become standardized and mature, we will usher in a stage where blockchain will become mainstream and explode.
For the development status of the entire blockchain technology, Helium China ManaGing Director Gao Yuan pointed out: "Currently, the user experience of various blockchain applications is not very good. The development of middleware and the maturity of the user end are the key points to achieve large-scale applications. In the end, blockchain can be implemented and become a real economy. Part of it requires maturity and clarity at the regulatory level."
However, the implementation of blockchain applications still requires continuous exploration. If the performance of the underlying infrastructure of the blockchain is not improved, it will be difficult to achieve large-scale commercial applications in the future. So, what is the reason why a large number of blockchain applications have not been successfully implemented? Charlie Hu, head of Polygon China, believes:
First, it is not friendly enough to developers;
Second, it has limited expansion performance;
Third, it lacks interoperability, and its core logic is the future blockchain The world is not just one chain, but multiple chains coexist. Based on the existence of different chains for different business applications, cross-chain interoperability is very important.
Why is interoperability crucial for different blockchains?
The "interoperability" of blockchain means that different blockchain networks can easily communicate with each other and share information. Interoperability mainly refers to application layer interoperability, inter-chain interoperability, and off-chain data interoperability.
IOHK CEO and Cardano founder Charles Hoskinson said in an interview with Forbes that blockchain interoperability will lead to easy migration from one system to another.
In the blockchain industry, a blockchain that can meet user needs and operate efficiently is a necessity, and its status is very important. Although Ethereum has innovatively created smart contract technology and built a super ecosystem containing various applications, it is far from meeting commercial needs, at least until Ethereum 2.0 is fully launched.
Why is blockchain interoperability so important? With the continuous expansion of blockchain technology itself and the expansion of its applications in different industries, it is difficult to interoperate between different chains, difficult to connect between different applications, and difficult to trust the interaction between the chain and the off-chain. These problems are very important. To a certain extent, it limits the large-scale application of blockchain.
The scenario requirements between different blockchains may be different, and under these different requirements, a large number of interactions are required. Regarding interoperability, Iris, head of Asia business strategy at Edge & Node, said: "If there are islands between chains, there will be no way to interact, which will greatly affect applications. Interoperability across chains has different levels. From assets to data, to a lower-level consensus. Many projects have already realized asset cross-chain, and the next more difficult step is data cross-chain.”
It is far from achieving interoperability between different blockchains. not enough. According to Zhixian, the founder of Leitu Technology, interoperability should not be limited to the blockchain ecosystem. Only by opening up the interoperability between the blockchain and the Internet can the user base be maximized.
Cross-chain technologyTechnology is key to achieving interoperability. Currently, cross-chain technologies include notary mechanisms, side chains/relay chains, hash time locking, and distributed private key control.
In terms of data trust and security issues during the interaction process, O3Labs product VP Tim believes that the interoperability of different chains may have some challenges. He added:
First, user experience. Products must be made for more users. Whether in enterprises, institutions or consumers, user experience issues will be taken into consideration. Even if it can be achieved in terms of technology, it must also be achieved in terms of experience.
Second, security. Different chains will need to adjust some off-chain data. Different chains have different methods, so it is important to ensure the accuracy of the data. Because this will become a foundation, if there are many applications on this chain in the future, the accuracy and speed of these data must be very consistent.
Just like the emphasis on privacy protection in the traditional Internet, privacy protection issues must also be paid attention to between different chains and in the process of on-chain and off-chain interactions. Every interaction should avoid privacy leakage during the interaction. Suterusu CTO Lin Huang said that currently, there are too many cross-chain projects, and there are many products in this area. However, there are relatively few products that consider supporting multi-chain privacy protection. Suterusu has already done a lot of work on privacy protection and will be deployed on some chains next.
The future of blockchain - the coexistence of multiple chains
The blockchain industry has been constantly evolving. In addition to Ethereum, there are many blockchains emerging with the same vision as Ethereum, such as EOS, Polkadot, Cosmos, Avalanche, Polygon, etc.
Competition and cooperation are inevitable for the development of various industries, and the same is true for the blockchain industry. Only through competition can we continue to innovate.
In the future, Ethereum will not be "one super, many strong", but will inevitably form a situation where multiple chains coexist. Different public chains and different infrastructures will have some differentiated competition, and finally these different chains will be connected through cross-chain technology.
When asked about the future development of blockchain, He Yifan, executive director of the BSN Development Alliance and CEO of Beijing Hongzao Technology Co., Ltd., looked forward to:
In 3 to 5 years, especially the operating system layer will become more and more mature. In this case, blockchain technology should become a conventional technology. If developers don't even know how to use traditional databases, they don't have to work at all. In 3 to 5 years, every developer should be able to use blockchain technology to build basic applications.

⑵ Easy-to-understand explanation of blockchain

The popular explanation of blockchain technology is as follows:

To put it simply: blockchain is the use of a package of existing A new generation of network system formed using advanced network technology. 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, and analysisDistributed storage technology, consensus mechanism, and smart contracts.

Essentially: it is a shared database, and the data or information stored in it is "unforgeable", "full-process traces", "traceable", "open and transparent" and "collectively maintained" ” and other characteristics. Based on these characteristics, blockchain technology has laid a solid foundation for "trust-based 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.

⑶ What is blockchain, how was it born, and 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.

⑷ What is blockchain

Blockchain means a term in the field of information technology. In essence, it is a shared database, and the data or information stored in it has the characteristics of "stupid and unforgeable", "full traces left", "traceable", "open and transparent" and "collectively maintained".

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

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

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Related information

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