区块链没有服务器吗,区块链没有服务器数据存在哪里
区块链技术是一种去中心化的分布式账本技术，它不需要服务器，因此也不需要服务器。它的数据存储在网络中的每一个节点上，并通过共识机制确保数据的安全性和一致性。本文将讨论三个关键词：去中心化，分布式账本和共识机制，以更好地了解区块链没有服务器数据存在哪里。
1. 去中心化去中心化是区块链技术的核心概念，它是一种分布式技术，不需要集中的服务器来维护数据。去中心化的网络是由许多节点组成的，每个节点都是一个独立的实体，它们之间没有中心化的管理机构。每个节点都可以自由地存储和传输数据，并参与网络中的共识机制。
2. 分布式账本分布式账本是区块链技术的基础，它是一种分布式数据库，可以记录所有参与者之间的交易。它是一个分布式的、可信赖的数据库，可以安全地存储和管理用户的数据。它的优点在于，它可以记录所有参与者之间的交易，而不需要中心化的服务器来维护和管理数据。
3. 共识机制共识机制是区块链技术的核心，它是一种保证网络的安全性和一致性的机制。它可以确保网络中的每个节点都能够达成一致，从而确保数据的安全性。共识机制的实现方式有很多，比如工作量证明、拜占庭将军问题、算法投票等。它们都有一个共同的目的，即确保网络中的每个节点都能够达成一致，从而确保数据的安全性和一致性。
以上就是关于区块链没有服务器数据存在哪里的三个关键词：去中心化，分布式账本和共识机制。去中心化是区块链技术的核心概念，它不需要集中的服务器来维护数据，而是由许多节点组成的网络，每个节点都可以自由地存储和传输数据。分布式账本是区块链技术的基础，可以记录所有参与者之间的交易，而不需要中心化的服务器来维护和管理数据。共识机制是保证网络的安全性和一致性的机制，它可以确保网络中的每个节点都能够达成一致，从而确保数据的安全性。
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⑴ What is blockchain and what does it do
Comparative analysis of centralized server finance and decentralized blockchain finance
1. Login Interface:
Centralization: There is an independent domain name, server, membership management entrance login for website and app.
Decentralization: no server, no domain name and no app. The dapp browsers of third-party Ethereum (ETH) wallets are all entrances, such as Binance Wallet, AM Wallet, Math Wallet, etc. Dapp can only be read in the block explorer.
2. Essential differences:
Centralization:
1. The model and data are stored on the server and can be modified at will, and the outflow of funds can be controlled.
2. Financial data cannot be disclosed to investors. Bonuses are settled uniformly by financial personnel.
3. There is the possibility and feasibility of making money and running away.
Decentralization:
1. The entire business model relies on the automatic execution of Ethereum (ETH) smart contracts and is separated from human management.
2. Financial openness and transparency, bonus block settlement.
3. Eliminate the possibility of making money and running away.
3. Security of personal information and funds:
Centralization:
1. Order submission requires: name, phone number, ID card, bank card and other information, there is a risk of leaking personal information.
2. The funds are stored in the bank card or centralized wallet of the project party. When the entry funds > the exit funds, it will continue to run. When the entry funds
Decentralization:
p>1. No personal information is required, the Ethereum (ETH) wallet address is used as identification.
2. Funds are stored in the Ethereum (ETH) contract wallet address. No individual or organization can transfer Ethereum. No matter how the funds change, the possibility of trapping money and running away is eliminated.
IV. Bubble_and risk analysis
Centralization:
1. Development and operation costs 10%-20%
2 , company profit 30%-80%
3. Market allocation ratio 10%-50% as static and dynamic bonuses.
Decentralization:
1. No development and operation costs.
2. Technical profit 3%
3. Market allocation ratio 97% as static and dynamic bonuses.
To sum up: centralized projects are bound to perish, while decentralized projects will win the hearts of the people!
⑵ What exactly is blockchain? Which blockchains have physical applications
What is blockchain?
Official definition: Blockchain is a new application model of computer technology such as distributed data storage, point-to-point transmission consensus mechanism encryption algorithm, etc. The so-called consensus mechanism is a mathematical algorithm that establishes trust and obtains rights and interests between different nodes in the blockchain system.
Vernacular understanding: A block is to package all data generated within a time period in chronological order. Generally, the length of a block is 10 minutes, which means that within 10 minutes, all Internet data on the network will be packed into a complete package, this complete data package is called a block. The blockchain links these data packages in order to form a structure, and cryptographically ensures that it cannot be tampered with or forged to form a distributed ledger. This is the block chain. Blockchain.
It seems that everyone has a preliminary knowledge and understanding of the blockchain. So whether the blockchain has any practical application in daily life, the answer is yes, the current practical application There are mainly the following aspects. Of course, I may not know some of them. Friends are welcome to leave messages to add.
Financial Industry
Blockchain should be used the most in the financial industry.
For example, in May 2017, OMG (Omise Coin) announced that it would cooperate with Alipay to launch an electronic wallet, integrating the "Alipay" payment solution into its own payment service suite to help local electronics in Thailand. Business merchants accept online payment transactions from Chinese tourists.
Another example is PPT, which is a financial transaction system for bills based on blockchain.
Gaming
The gambling industry entered the blockchain probably last year. Why does gambling favor blockchain? Because blockchain provides a relatively fair betting system. Why? It is relatively fair. As can be seen from the previous introduction, the blockchain cannot be tampered with or forged.
For example, WICC (WikiChain) can realize rich application scenarios such as asset issuance, betting applications, copyright traceability, mutual insurance, decentralized exchanges, and cross-border settlement.
For example, the STX (King of Fighters Token) stox application is designed to provide the full functionality of a prediction market application without the need for any central server. Prediction markets require functions such as event planning, market production, providing information and analysis to traders, reporting event results, and of course collection and payment.
I believe that if the current lottery industry is built on the blockchain, people will become more and more enthusiastic about buying, because there are too many insider tips that make people give up.
Internet of Things
The Internet of Things still has many applications on the blockchain, because the traceability and immediacy of blocks are very suitable for this industry.
For example, DATA is the concept of the Internet of Things. It is a decentralized p2p network. Data sources can connect to any node in the entire network, then publish data, and the network will immediately send it to subscribers. Horizontal scalability is achieved through sharding pattern. This timeliness and accuracy are very important in IoT applications.
Game industry
For example, GTC (G coin) is a decentralized digital asset based on Ethereum erc20 issued by Game Global. G coin is committed to becoming a universal number in the global game industry. goodscurrency standard.
For example, MANA is a distributed shared virtual platform. On this platform, users can browse and discover content and interact with other people and entities. Users can also claim ownership of virtual territories through a blockchain-based land ledger. The territory is demarcated by rectangular coordinates (x, y), and its owner can decide the content published on the territory, including static 3D scenes to interactive systems such as games.
There are many other industries. The emperor did not list them one by one, but listed a few representative ones. What is the purpose? It shows that the blockchain is definitely not just a currency transaction, it is a real implementation project, and it is a product of the changes of the times with real practical uses.
The development of human society is actually like the blockchain, it is irreversible and unstoppable. As far as I feel, the blockchain will enter thousands of households sooner or later. Regardless of whether it is bull or bear, hold it in your hands. Value coins and Flush have started quoting digital currencies, which shows that society is accepting it step by step. The power of social development cannot be blocked by any country or person.
⑶ Does the benefit mechanism of blockchain traceability have servers for all transaction parties?
Yes
First of all, blockchain is a multi-party consensus mechanism, and the algorithm of this consensus It is the basis for building trust in the entire technology. It does not rely on trust in people and institutions, but is a relatively democratic mechanism. Under the constraints of this mechanism, the authenticity, validity and continuity of the data are guaranteed, thereby establishing the trust foundation of this alliance business where multiple parties unite and supervise each other.
Secondly, blockchain is also a relatively secure system. Bitcoin is a blockchain application that everyone is familiar with, and it is also the most successful blockchain application so far. So far, Bitcoin has been running stably for 6-7 years. This system almost breaks everyone's concept of traditional financial system construction. First of all, it does not have any security protection facilities. Anyone who takes a machine and enters this network can join the network and work, and More than 80% of the machines in the entire Bitcoin network are almost bare metal. They have neither good security protection nor any firewall measures. Secondly, related to the design of Bitcoin, some of its data can track history and prevent tampering. and irrevocable.
Finally, this is also an obvious feature of blockchain. It is a very open system. There are already many open source underlying implementations for everyone to refer to or use, and it is very scalable. We have also been working hard to establish multi-center industry alliances or business alliances.
⑷ Does the blockchain depend on the server?
The blockchain is decentralized and uses distributed computing. The computing power can be distributed among various nodes. Since each node controls information Peer-to-peer requirements require very high computing power for nodes or users. If data is allowed to be actively broadcast, it will look like a broadcast storm. The best way is to set up a central node to transfer data, and solve the big problems of computing power and storage, and hand over the small parts of computing power and storage to user nodes. Therefore, whether it is distributed computing or centralized computing, servers are needed to solve the computing and storage problems. What do you think< /p>
⑸ What is blockchain? Blockchain is virtual currency
Let me tell you about blockchain in a simple way. There is no need to use advanced professional terms, because that It’s too difficult to understand. Let me give you an analogy to make sure you understand it at a glance.
Chinese mahjong can be understood as blockchain. If the four of you ABCD are going to play mahjong, who will say hello? If A greets, then A is the initiator of this block. A is responsible for finding the mahjong parlor. Organizer A can invite BCD, or B can invite C or C can invite D. It doesn't matter.
abcd gathered in a mahjong parlor and started playing mahjong. The process of shuffling the cards in the mahjong machine, drawing the cards, and playing the cards by abcd can be understood as a mining stage similar to Bitcoin in the blockchain.
Everyone has different cards, which is equivalent to the algorithm in the block, but there is a goal, and they are all for the purpose of cheating. Among them, A cheated, and bcd said nothing. , everyone knows at a glance that A has won. This is called the consensus mechanism in the blockchain.
A is messed up. After A knocked down the mahjong, bcd all know how A got confused and remember it in their hearts. If A wins 10 yuan, both AbCD and A will know that A wins 10 yuan. , this is called distributed accounting in the blockchain.
Everyone who plays mahjong knows what mahjong arrangement can be used, and everyone also knows what cards can be doubled, so this can be understood as a smart contract in the blockchain.
Everyone knows the final winning card of A after A is knocked down. No one can tamper with this result because everyone is watching it. This can be understood as the immutability of the blockchain. sex.
After A announced that he was cheating, everyone did not go to another person, such as E, F, G... to verify. The same was true after B won... no regulatory agency can control it They all manage themselves. This is the decentralization in the blockchain.
By analogy, the four buddies abcd played mahjong for a day, and abcd recorded the winning and losing of each game, no matter what method they used, whether it was brain memory, video recording, or notes. Well, the more they fight, the more they can reflect the immutability, decentralization, distributed accounting, and consensus of the blockchain...
At this point, you Now you basically understand what blockchain is, isn’t it very simple?
The second question is that blockchain is not a virtual currency. Virtual currency is just a part of blockchain technology.
Many people think that virtual currency is the blockchain and Bitcoin is the blockchain. This is actually wrong. It’s just that Bitcoin is famous for making blocksThe chain has just entered the public eye.
Satoshi Nakamoto invented Bitcoin using blockchain technology, and he defined Bitcoin as a peer-to-peer electronic cash system. The term "electronic cash" indicates that what Satoshi Nakamoto wanted to invent was not Not just a payment system, but a monetary system with an independent monetary philosophy.
Today’s hotly-hyped virtual currencies, as well as mining, are resisted by many departments and countries. The fundamental purpose is not to waste resources, electricity, etc., but because people with blockchain technology Virtual currency has subverted traditional finance and can easily cause the collapse of traditional finance. I have talked about this in my previous Q&A, so I won’t go into details here.
It can be said that Satoshi Nakamoto and the Bitcoin he invented are the pioneers of the blockchain. It was Satoshi Nakamoto who brought blockchain technology into everyone’s field of vision. The application of blockchain technology is still very wide, in finance, medical care, service industry, big data security...
Let’s talk about this big data. As we all know, the recent Didi incident due to big data security The impact is still quite large. If decentralization in blockchain technology is used, personal data can be obtained and saved through the blockchain. How can there be data leakage? In today's society, with the advancement of science and technology, as long as you use your mobile phone to connect to the Internet, you have no data security. Your personal information has already been leaked completely, so blockchain technology is inevitable for social progress. trend.
Let’s talk about blockchain. I hope you can learn something from it. You can also pay more attention to blockchain technology and improve your cognitive level. (Personally manually coded)
Blockchain is a distributed storage solution.
Virtual currency is a supporting reward mechanism for promoting this plan.
The blockchain is decentralized, so there will be no IDC computer room or centralized data center. The storage of all data is theoretically fragmented. This requires a reward to attract others to join the project, and this reward is virtual currency.
In theory, blockchain can form a dynamically stable and decentralized cloud-like computing resource provision channel.
Bitcoin is the earliest blockchain application, while Ethereum is a second-generation blockchain that can support on-chain applications. The hardware resources required for these applications are provided by miners, so they must be paid Miners pay a certain fee, and the common currency used for this fee is Ethereum.
The biggest attraction of blockchain is decentralization. In theory, applications on the chain will not disappear. No cloud containers will be lost, no data centers will be blown away by typhoons, and there will be no An organization can decide whether it stays or goes.
However, the reality is that there are still a lot of problems in on-chain applications, such as high latency, imperfect infrastructure, and the reward-based miner attraction mechanism has not accelerated the on-chain speed as expected., as well as issues such as the prosperity of virtual currencies alone, the return of decentralization to centralized exchanges, and so on. There is also the inflow of black money, which is making this emerging industry full of uncertainty.
But from a technical perspective, blockchain technology is indeed the next generation of computer application technology.
Blockchain is a technology, a distributed and decentralized technology that can be applied to storage. Blockchain is not a virtual currency. Virtual currency is just a digital currency made using blockchain technology. Now, for example, the relationship between blockchain and digital currency is like, for example, if you build a dapp application mall on a certain chain, then you A token related to this mall can be issued.
The real connection between blockchain and virtual currencyWhat we are pursuing now is the application of blockchain technology. You develop a public chain and build many shopping malls, finance, defi, real estate, and tourism on this public chain. Such a dapp, this public chain has value, and then the tokens issued by this public chain have value, just like the current Ethereum, pi network
There are too many on the Internet now The so-called "blockchain digital currency", when we look at virtual currency, we look at what problems the public chain it is on can solve and what value it has, rather than blindly hype it. I think blockchain is the underlying technology. I think we only know The surface of blockchain.
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Author: Leng Leng's point of view
Block Chain is a technology, and virtual currencies like Bitcoin are products of applications on the blockchain. There are many video explanations on my homepage.
Blockchain is a technology, and virtual currency is a product produced by applying blockchain technology.
Bitcoin brought out blockchain technology, making people who don’t know why think that Bitcoin is equivalent to blockchain.
What is blockchain?
Every computer (mobile phone) is a block, which is connected through the Internet to form a blockchain.
Different from the traditional Internet, for example, when playing Douyin, each of us requests the Douyin server, and the Douyin server gives us the video. Everyone who plays Douyin cannot do without the Douyin server, and the Douyin server is our center. There is no center in the blockchain. Everyone (each block) is a server. When a block generates new content, everyone will be notified and everyone will save the new content to their own server. Each block saves The content is the same. If a new user (block) joins, it needs to synchronize the data on the blockchain and update the data to its own server first.
The advantage of blockchain is that it can ensure data security and cannot change the data. It is useless if you change one or two blocks of data. Once the blockchain data is synchronized, it will become the correct value. The traditional central server will not work. Hackers invaded the Douyin server. AllUsers all suffer.
Disadvantages of blockchain are low efficiency. The blockchain requires synchronization of blockchain data in each block. New changes on the blockchain require simultaneous updates from users on the entire blockchain network, which is inefficient.
Blockchain is a computer model of distributed data storage, point-to-point transmission, and consensus mechanism. In simple terms, blockchain is a decentralized database. How to use this technology? Is the value reflected? Under the consensus mechanism, a technology such as blockchain is formed to give a specific token, which is BTC
Blockchain is a new Internet application technology that uses distributed storage, passwords The application of emerging technologies such as science, smart contracts, and consensus algorithms can be said to be a new data transmission method that innovates existing Internet protocols. At present, blockchain technology is constantly iterating
1. Blockchain 1.0, symbolizing the birth of Bitcoin; only with Bitcoin can the development of blockchain technology officially occur
2 , Blockchain 2.0, Ethereum decentralized application platform, Ethereum introduces the application of smart contracts, which represents the beginning of a new era of blockchain technology; now everyone can create projects on Ethereum, and in recent years Many good projects have been launched
3. Blockchain 3.0, DeFi opens the era of decentralized finance. DeFi projects use smart contract technology to realize various functions of traditional financial institutions, such as derivatives, Lending, trading, financial management, asset management, and insurance, etc. There are currently mixed reviews for DEFI, which will take time to verify
Although the blockchain originated from Bitcoin, just like the first computer when the Internet first appeared, Bitcoin is mainly used by miners. Mining rewards
Blockchain is a decentralized accounting method. Virtual currency is a product of the blockchain.
⑹ Where is the data in the blockchain stored?
The data in the blockchain all exists in the terminal or in the server. Because we are talking about blockchain, its user terminal can also be a server, and the server can also be a user terminal, so it is all stored on these devices.
⑺ Does blockchain use a server?
Hello, to be precise, blockchain is a technical model, and the server is a physical hardware resource. There will be combined applications of both. For example, the combination of storage-type servers and blockchain improves information security.
With the development of the Internet, data is stored in storage servers, and the security of data is a concern for everyone. Blockchain technology uses cryptography to ensure the security of data transmission and access. During the data extraction process, it can realize the centralized use of unstructured data required for various studies, thereby making the storage server data safe.
Tenth Power provides enterprise IT hardware solutions such as server rental and sales, and cooperates with a wide range of industries, including the Internet, blockchainChains, scientific research institutions, rendering design, intelligent manufacturing, etc.
⑻ Does the digital currency wallet have a server?
Asset security has always been the most important issue in blockchain investment, and the wallet is used to store assets. If something goes wrong with the wallet , all assets will be lost. Today, we will introduce the types of wallets. We often hear about hot wallets, cold wallets, hardware wallets, etc. What are the differences between them?
Digital wallets can be classified into different categories according to different standards. Let’s talk about the common ones below. Several digital wallet classification methods.
Classified according to whether the private key is in your own hands
In the world of digital currency, the private key represents the ownership and control of the asset. As long as you have the private key, Once you have mastered the digital assets, according to whether the private key is in your own hands, the digital wallet can be divided into a centralized wallet and a decentralized wallet.
If the private key is uploaded to the service provider's server, it is called a centralized wallet. The user does not have the private key. The private key is in the hands of the service provider. For example, when we trade on a centralized platform , digital assets are stored in the digital wallet of the trading platform. We do not have the private key. In theory, the trading platform can transfer our assets.
If the private key of the digital wallet we use is in our own hands, and the service provider does not upload and store our private key, such a digital wallet is called a decentralized digital wallet. Currently, many digital wallets Wallets are all decentralized.
Our digital assets can be stored on the platform, which makes transactions more convenient, or they can be stored in a decentralized digital wallet and manage the private keys yourself, which is theoretically more secure.
Classified according to whether the private key is exposed to the network during the storage process
We often hear that platforms generally store most digital assets in cold wallets , mainly for security reasons, and store a small amount of digital assets in hot wallets to facilitate transactions.
Why is it safer to store digital assets in a cold wallet? Because the cold wallet is not connected to the Internet, its security is greatly increased, while the hot wallet is connected to the Internet, so in theory the security of the hot wallet is Sex is not as good as a cold wallet.
Common cold wallets include paper wallets, brain wallets, hardware wallets, offline mobile wallets, etc. Digital wallets that are not connected to the Internet can be collectively called cold wallets.
A paper wallet is a digital wallet in which we copy the private key on paper. This is also a common way to back up the private key;
The brain wallet usually refers to the private key. Keep it in your mind, but it doesn't mean that a weird man can remember that long list of hash private keys with no rules. It is too difficult. Instead, memorize mnemonic words or use online brain wallet generation tools to generate specific and convenient "memory" words."Brain Wallet Password", many people use their favorite sentences or even hide the password in poetry. Of course, the fact that a large number of people were stolen in the end proves that this is very unsafe;
Hardware wallet refers to a digital wallet. The private key of the asset is stored separately in the hardware device, a wallet isolated from the Internet. The hardware money is stored offline, and the device is in your own hands, giving you absolute control over the digital assets, so that hackers cannot easily obtain the private key;
In addition, some mobile phones or computers that are never connected to the Internet can also be made into cold wallets.
Unlike cold wallets that are not connected to the Internet, hot wallets are connected to the Internet. , for example, the mobile wallets and PC wallets that we usually use are all hot wallets.
The following is summarized with a mind map:
According to the classification of custodial and non-custodial wallets
According to the classification of custodial and non-custodial wallets, digital wallets can be divided into full node wallets and light node wallets.
Full A node wallet refers to a wallet that synchronizes all data on the blockchain. For example, the full node data of Bitcoin has reached hundreds of gigabytes. The Bitcoin full node wallet needs to synchronize all data. Although the full node wallet occupies a relatively large storage space , but can achieve complete decentralization.
Light node wallets rely on other full node wallets on the blockchain and only synchronize data related to themselves, thus achieving partial decentralization. For example Our commonly used Bitcoin wallets are light node wallets. When using these wallets, you only download the data related to your own Bitcoin account. Downloading hundreds of gigabytes of data is unrealistic.
Centralized wallets are It means that all data is obtained from its own centralized server. The data relies on the wallet service provider's own ledger. Its transaction efficiency is very high and it can basically achieve real-time payment. For example, our wallet on the trading platform is a centralized wallet.
