Decentralized e-cash system

1.

Public chain, also known as "public chain", refers to the blockchain that anyone in the world can enter the system at any time to read data, send confirmatory transactions and compete for bookkeeping. The public chain is generally considered to be "completely decentralized", because no indivial or institution can control or tamper with the reading and writing of data in it. In terms of application, blockchain public chain mainly includes bitcoin, Ethereum, super ledger, most counterfeit currencies and smart contracts. The ancestor of blockchain public chain is bitcoin blockchain, which has the following characteristics:

1, open source code

upload the code to GitHub, and everyone can get complete blockchain data by downloading, Accept the test of the public

2, complete decentralization

anyone can become a node, each node is open, everyone can participate in the calculation of the blockchain, any node is not permanent, but phased, and any center is not mandatory for nodes. Anyone can read and send transactions, and transactions can be effectively confirmed on the blockchain. Anyone can participate in the consensus process. The consensus process determines whether a block can be added to the blockchain and the exact current state. Everyone can get financial reward from it, which is proportional to their contribution to the consensus process. These public chains are generally considered to be "completely decentralized"

3. Developing decentralized applications

through this public chain, developers can easily develop centralized applications. Public chain can protect the rights and interests of users from the influence of program developers

2. Bitcoin is a decentralized point-to-point e-cash system. It has been more than 10 years since its birth. The price of bitcoin now hovers around $10000. Many people think that the price is too high and it is not cost-effective to buy it now. But in fact, even though bitcoin has been around for 10 years, it is still like a fetus in the womb, and a lot of people do not know the existence of bitcoin
bitcoin has not yet grown into a baby, and there is still huge room for growth. Its prospects are broad. In the next decade, let's look at the height of bitcoin. More and more people will know about bitcoin. Everyone needs bitcoin, and the demand for bitcoin transactions will be extremely strong.

3. Bitcoin cash transaction is not congested, and the handling charge is lower

4. Function Description:
Le Pai lock screen (original lock screen magazine) can provide you with personalized matching and exquisite and high-quality content
setting method:
1. Coloros 7 and above: "Settings > desktop and music lock screen > Music lock screen"
2. Coloros version 5.0-6.1.2: "Settings > desktop and lock screen magazine > lock screen magazine"
3. Coloros version 3.1-3.2: "Settings > display and brightness > lock screen magazine and wallpaper > lock screen magazine"
4. Coloros version 3.0: "Settings > lock screen magazine and wallpaper > lock screen magazine"
precautions:
1. By default, the lock screen magazine only updates pictures under WiFi, and does not consume data traffic
2. Coloros before 3.0 does not support lock screen magazines.

5. It seems that on October 31, 2008, Satoshi Nakamoto published the white paper of bitcoin for the first time, and proposed to realize value transfer through decentralized bitcoin network.

6. The concept of bitcoin was first proposed by Nakamoto in 2009. According to Nakamoto's idea, open source software was designed and released, and P2P network was built on it.

7.

When it comes to blockchain, we often encounter the concept of "decentralization". So what is decentralization? Nakamoto has solved the difficult problem of "point-to-point e-cash" defined by himself. In this process, he "invented" the blockchain technology. Bitcoin system integrates technology and theory of cryptography, game theory and software engineering. Blockchain technology is an innovation formed by ingenious combination of existing technologies. Nakamoto didn't solve the problem of "peer-to-peer e-cash" out of thin air. He followed the footsteps of his predecessors, but he completed the last leap

"decentralization" is the competitive advantage of removing the centralized central node. It does not mean that there is no center, but the center node is a relatively neutral existence. These central nodes will not be mandatory. For a fully decentralized system, the connection between nodes is not completed by specific nodes, and all nodes can store and update data on the system, so as to achieve openness

decentralized blockchain is essentially a decentralized distributed ledger database. The simple understanding is that the data of blockchain is stored in many nodes of the network. The traditional way of data storage exists in one or several large nodes in the network. From this point of view, the so-called centralization and decentralization is the difference in the number of nodes storing data. Therefore, the decentralization of blockchain is relative. Data only exists on one node, which must be centralized. But if there are 100 nodes, they can be said to be decentralized relative to one node, but the degree of decentralization is not the same. At the same time, centralization and decentralization are not contradictory, and they are not completely opposite, because the word "de" in decentralization means the process of weakening and eliminating the center, rather than the concept that there is absolutely no center, which is completely opposite to non centralization

the Xueshuo innovation blockchain Technology Workstation of Lianqiao ecation online is the only approved "blockchain Technology Specialty" pilot workstation of "smart learning workshop 2020 Xueshuo innovation workstation" launched by the school planning, construction and development center of the Ministry of ecation of China. Based on providing diversified growth paths for students, the professional station promotes the reform of the training mode of the combination of professional degree research, proction, learning and research, and constructs the applied and compound talent training system