币圈有多少个交易所,区块链币的市值排行

㈠ How many public blockchain chains in the world belong to which country

There are 1,059 public blockchain chains in the world belonging to cooperative countries
Blockchain is distributed New application models of computer technologies such as automatic data storage, point-to-point transmission, consensus mechanisms, and encryption algorithms.
Blockchain is essentially a decentralized database.
Country is a term in political geography. From a broad perspective, a nation refers to a social group that shares a common language, culture, ethnicity, territory, government, or history.
From a narrow perspective, a country is a form of community formed by groups of people within a certain range.

㈡ What are the blockchain digital currencies?

Bitcoin, Litecoin, Ethereum, Ripple, etc.

Blockchain is the core supporting technology of the digital cryptocurrency system represented by Bitcoin. The core advantage of blockchain technology is decentralization. It can realize point-to-point transactions based on decentralized credit in a distributed system where nodes do not need to trust each other by using data encryption, timestamps, distributed consensus and economic incentives. Coordination and collaboration thus provide solutions to the common problems of high cost, low efficiency and insecure data storage in centralized institutions.
The application fields of blockchain include digital currency, certificates, finance, anti-counterfeiting and traceability, privacy protection, supply chain, entertainment, etc. With the popularity of blockchain and Bitcoin, many related top domain names have been registered. , which has had a relatively large impact on the domain name industry.

㈢What are the blockchains in total?

Blockchain mainly solves the trust and security issues of transactions, so it proposes four technological innovations to address this issue:
(1) Distributed ledger means that transaction accounting is completed by multiple nodes distributed in different places, and each node records a complete account, so they can all participate in supervising the legality of transactions, and can also work together for His testimony.
Different from traditional distributed storage, the uniqueness of blockchain distributed storage is mainly reflected in two aspects: First, each node of the blockchain stores complete data according to the block chain structure. Traditional distributed storage generally divides data into multiple parts for storage according to certain rules. Second, the storage of each node in the blockchain is independent and of equal status, relying on the consensus mechanism to ensure storage consistency, while traditional distributed storage generally synchronizes data to other backup nodes through the central node. [8]
No node can record ledger data independently, thus avoiding the possibility of a single bookkeeper being controlled or bribed to record false accounts. Also because there are enough accounting nodes, theoretically, unless all nodes are destroyed, the accounts will not be lost, thus ensuring the security of the accounting data.
(2) Asymmetric encryption and authorization technology. The transaction information stored on the blockchain is public, but the account identity information is highly encrypted and can only be accessed with the authorization of the data owner, thus promiseData security and personal privacy.
(3) Consensus mechanism is how all accounting nodes reach a consensus to determine the validity of a record. This is both a means of identification and a means of preventing tampering. Blockchain proposes four different consensus mechanisms, which are suitable for different application scenarios and strike a balance between efficiency and security.
The consensus mechanism of the blockchain has the characteristics of "the minority obeys the majority" and "everyone is equal". "The minority obeys the majority" does not entirely refer to the number of nodes, but can also be computing power, number of shares, or other factors. A characteristic quantity that a computer can compare. "Everyone is equal" means that when a node meets the conditions, all nodes have the right to give priority to the consensus result, which will be directly recognized by other nodes and may eventually become the final consensus result. Taking Bitcoin as an example, it uses proof of work. Only when more than 51% of the accounting nodes in the entire network are controlled, it is possible to forge a non-existent record. When there are enough nodes joining the blockchain, this is basically impossible, thus eliminating the possibility of fraud.
(4) Smart contracts, smart contracts are based on these trustworthy and non-tamperable data and can be automated Enforce some predefined rules and terms. Take insurance as an example. If everyone's information (including medical information and risk occurrence information) is true and trustworthy, it will be easy to automate claims settlement in some standardized insurance products.

㈣ What are the three major public chains of blockchain?

Public chain, the abbreviation of public chain, means that anyone in the world can read it, anyone can send transactions and the transactions can be effectively confirmed. A blockchain in which anyone can participate in the consensus process.

1. The top three public chains in the world
BTC, ETH, and EOS (by market capitalization) are three heavyweight products, representing Blockchain 1.0, Blockchain 2.0 and Blockchain 3.0 respectively. Three stage.

1. Bitcoin BTC (Blockchain 1.0)
Bitcoin has emerged as a new type of digital currency and global payment network since its birth in 2009. BTC is also the most successful and mature application of blockchain. , now in many situations, BTC is much more famous than blockchain.

2. Ethereum ETH (Blockchain 2.0)
In layman’s terms, Ethereum is an open source platform digital currency and blockchain platform that provides developers with a platform to build and publish applications on the blockchain. . Ethereum can program, decentralize, guarantee, trade anything, vote domain names, financial exchanges, crowdfunding, company management contracts and most agreements, intellectual property, and hardware-integrated smart assets, etc.

3. Yuzu EOS (Blockchain 3.0)
EOS appears as an enterprise-level blockchain operating system based on Bitcoin and Ethereum, which is easier to use and more powerful than the former. EOS provides all application developers with many functions such as database account permission settings, execution scheduling authentication, and network communication..

2. The world's three major exchange public chains: Huobi Chain, Binance Chain, and OKEx Chain OKChain
1. Developed by Huobi Chain, the world's largest trading platform, Huobi Chain is An independently innovative supervised blockchain operating system for the financial field, based on blockchain global asset digitization and financial market infrastructure. At the same time, based on the consideration of injecting the long-term value of HT into a unified value carrier, HT will serve as the only underlying token of the Huobi public chain.
2. Developed by Binance, the world's second largest trading platform, Binance Chain started early in application and is currently mainly circulated on DEX and asset chains. Binance Chain is a digital asset creation and exchange platform, with BNB as the main chain token
3. Developed by OKEx, the world's third largest trading platform, OKChain is a more scalable, high-transaction processing capability trading and smart contract platform, OKChain Developed based on Cosmos-SDK, the consensus uses DPOS. OKB is the underlying token of the OKEx ecosystem.

㈤ Classification of blockchains

Currently blockchains are divided into three categories, among which hybrid blockchains and private blockchains can be regarded as: generalized private chains, Public Blockchain Public Blockchain. This means that any individual or group in the world can send transactions, the transactions can be effectively confirmed by the blockchain, and anyone can participate in its consensus process. Public blockchain is currently the earliest blockchain and the most widely used blockchain. Each virtual digital currency of the Bitcoin series is based on a public blockchain, and there is only one blockchain in the world corresponding to this currency.
Extended information
1. Industrial blockchain industry blockchains: multiple pre-selected nodes in the group are designated as bookkeepers, and the generation of each block is jointly decided by all pre-selected nodes (pre-selected nodes participate in the consensus process), others Access nodes can participate in transactions but do not interfere with the accounting process (essentially, it is managed bookkeeping, but it becomes distributed bookkeeping). How many pre-selected nodes and how to determine the bookkeeper for each block becomes the main risk point of the blockchain ), anyone else can make limited queries through the blockchain’s open API. Private Blockchain Private Blockchain ((privateblockchains)): Only the general ledger technology of the blockchain is used for accounting. It can be a blockchain with exclusive written permission from a company or individual. This chain is not much different from other distributed storage solutions. At present (December 2015), conservative giants (traditional finance) want to try private blockchains, while the applications of public chains, such as Bitcoin, have been industrialized, and the application products of private chains are still being explored. Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithms. Blockchain is an important concept of Bitcoin. Essentially, it is aA decentralized database.
2. At the same time, as the underlying technology of Bitcoin, it is a series of data blocks associated with encryption methods. Each data block contains a batch of Bitcoin network transaction information, verify the validity of its information (anti-counterfeiting) and generate the next block. In fact, the word blockchain does not appear in the original English Bitcoin white paper, but appears in blockchain. In the earliest Bitcoin white paper, blockchain was translated as blockchain. This is the time when the Chinese word "blockchain" first appeared. The Cyberspace Administration of China issued the "Blockchain Information Service Management Regulations" on January 10, 2019, which came into effect on February 15, 2019. In a narrow sense, a blockchain is a chained data structure that combines data blocks in chronological order, and a tamper-proof and forgery-proof distributed ledger guaranteed by cryptography. Broadly speaking, blockchain technology is a new distributed infrastructure and computing method that uses blockchain data structures to verify and store data, distributed node consensus algorithms to generate and update data, and cryptography to Ensure the security of data transmission and access, using smart contracts composed of automated script code to program and operate data.

㈥ What are the chains in the blockchain?

Let’s learn about what chains are in the blockchain, let’s go.

1. Public Blockchain

A blockchain open to everyone and anyone can participate.

@Bitcoin is the representative.

The public chain is completely decentralized and not controlled by any organization. The ledger is completely open and transparent, and anyone can participate in the maintenance and data reading of the blockchain.

2. Consortium Blockchain

The nodes participating in the blockchain are selected in advance and are open to specific organizations or groups.

@R3CEV is the representative of the alliance chain.

The alliance chain is open to specific organizational groups, which means that the nodes participating in the blockchain are selected in advance, and there are likely to be good network connections between the nodes.

Features:

(1) The transaction speed is very fast;

It can achieve good connections between nodes and only requires a few It can maintain operation at a low cost, its transaction speed is very fast, and a small number of nodes also have a high degree of trust, and each node does not need to be verified.

(2) Transaction costs are significantly reduced or even zero;

When a centralized entity alliance handles accounting, there is no need for a high incentive mechanism. It can also prompt nodes to keep accounts, so the handling fee will be reduced.A lot, or even zero.

(3) Data can have a certain degree of privacy;

Data reading permissions in the alliance chain are hierarchical, external and internal, as well as between internal nodes. The permissions can also be different. The alliance chain also means that the application scope of this blockchain will not be too wide, and it is not like the network spread effect of Bitcoin.

3. Private Blockchain

It is open to individual individuals or entities. The participating nodes are only themselves. The access and use of data have strict permission management. Generally, For internal audit purposes.

@Since it is a control center that has the final say, the data inside cannot guarantee that it cannot be changed, and there is not much protection for third parties and the public. It is generally used for internal auditing.

Blockchain knowledge points, bit by bit.

㈦ What are the public chain coins?

1. BTC-Bitcoin
2. ETH-Ethereum currency.
3. EOS-Yozi Coin.
Extended information:
1. Bitcoin is called a peer-to-peer cash system. It was founded by the mysterious Satoshi Nakamoto and opened the era of decentralized and peer-to-peer digital currencies. After so many years of development, Bitcoin has become everyone’s The first currency that comes to mind when talking about blockchain is also the currency with the strongest consensus. Bitcoin is the originator of digital currency. Its network has been operating safely for 10 years. Its technology is highly innovative and stable. It is a combination of cryptography, distributed networks, and economics.
2. ETH, also known as Ethereum, is currently the largest public chain. It is a platform and a programming language that enable developers to build and release the next generation of distributed applications. Ethereum can be used to program, decentralize, secure and trade anything: voting, domain names, financial exchanges, crowdfunding, corporate governance, contracts and most agreements, intellectual property, and smart assets thanks to hardware integration. Ethereum will use a hybrid security protocol and use the proof-of-work (POW) mechanism in the early stage to distribute Ether coins.
3. EOS coin is a blockchain operating system specially designed for commercial distributed applications. The full English name is Enterprise Operation System, also called grapefruit coin. EOS currency adopts a new blockchain architecture that solves the problems of delay and data throughput through parallel chains and DPoS. It can be called a strong rival of Ethereum. EOS coins provide accounts, authentication, databases, asynchronous communication, and program scheduling on hundreds of CPUs or clusters. The EOS project aims to implement a blockchain architecture that can support millions of transactions per second without requiring ordinary users to pay usage fees.
4. ADA is a company that sells fast digital payments and high-performance public chain development.Point projects, with the help of the consensus structure of proof of equity, can achieve ultra-high confirmation speed and extremely low handling fees. The project was very popular when it was launched in the early days. It once created the myth of getting rich 450 times in 2 months after its launch, and its market value once reached the top five in the currency circle. However, as the number of competing projects continued to increase, the project's competitive advantage continued to decrease. It once fell out of the top ten by market capitalization. However, now the project has begun to develop the public chain ecosystem. Through the complete SDK development tools, it can easily release various digital assets and even private chains, and has raised the support and debuggability of smart contracts to a new level. .