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① What are the differences between blockchain and the Internet of Things

Internet of Things technology allows tangible objects used in daily life to be connected to the Internet, transmit data through algorithms, and better Provide services to customers. The most intuitive manifestation of the current rapid development of IoT technology is the proliferation of smart devices such as televisions, furniture, and vacuum cleaners. Currently, there are already smart homes that are entirely operated by built-in algorithms.

Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithms.

The distributed nature of blockchain means it is resistant to most security issues. Blockchain systems’ advanced encryption provides better protection against hackers than traditional client-server systems. This is why online transactions using virtual currencies are very safe.

② What are the properties that a blockchain system should have

In a blockchain system, it is necessary to describe ownership, protect ownership, store transaction data, and distribute ledgers to untrusted In the environment, adding transaction records to the ledger and deciding which ledgers determine the truth.
Bitcoin is a very typical blockchain system, you can study it carefully

③ Will the blockchain server have higher requirements than the general traditional server

For example, when many companies choose servers, they will consider the difference between blockchain servers and traditional servers. A brief analysis will be done below.

To be precise, blockchain is a technical model, and the server is a physical hardware resource. There is no comparison between the two. But if you insist on talking about the difference, you can also look at the differences and connections between the two.

To talk about the difference between the two,

The biggest feature of blockchain is decentralization

For example, the most typical application of blockchain is Bitcoin. Bitcoin is a decentralized currency that is independent of any third party. It does not have a centralized issuer. It is generated by the calculation of network nodes. Anyone can run the Bitcoin client software on a computer to participate in the creation of Bitcoin, no matter where they are. Anyone can mine, buy, and sell.

All nodes of the blockchain are distributed in different places. Each node maintains and manages itself. It does not require a large area for centralized construction and requires dedicated management and maintenance. It can make full use of idle resources. Due to the distributed nature, the system is difficult to destroy, such as Bitcoin. Even the most powerful people or organizations in the world today cannot destroy the Bitcoin system based on the blockchain.

Traditional servers are centralized services

Traditional centralized servers, such as WeChat, Alipay, etc., are responsible for providing services to all clients by the servers behind their companies, and the clients are The server gets the service. If their server is paralyzed by an attack, your WeChat and Alipay will not be able to be used. For example, on May 28, 2015, Ctrip suffered an unknown attack on its server.Neither the web version nor the mobile APP can be used normally.

Does the blockchain still need a server?

To be specific, the blockchain is also divided into public chain, private chain and alliance chain. The most essential difference between the three is their different degrees of decentralization.

That is to say, the public chain is completely decentralized. The Bitcoin mentioned above belongs to the public chain. The private chain and the alliance chain are not completely decentralized, and there is still the shadow of centralization.

As mentioned above, the blockchain is a technical model and the server is a physical hardware resource. The two will inevitably have combined applications.

For example, a storage-type server combined with a blockchain can use cryptography to ensure the security of data transmission and access, thereby making the storage server data more secure.

If you need to know more about the blockchain server, you are welcome to consult the 10th power computing power leasing platform.

④ What blockchain apps are there

Blockchain apps include: NetEase Planet Base, Shulian App, Lianxiang Finance, Shijilin Blockchain Trading Platform, Blockchain Electronic wallet, Ostrich Blockchain, GXS Wallet, Coin Wallet, Youling Wallet.

5. Youling Wallet

Youling App creates a personal-centered value exchange network and ecology, and creates decentralized interactive entertainment and zones for all. Blockchain new economic platform.

Youling App adopts a decentralized open model, allowing individuals (third-party developers) to develop various applications based on the Youling open platform. Each user can freely choose applications to build their own homepage, including but Not limited to: souvenirs, live broadcasts, sharing, communities, service sales, and product sales.

⑤ What do we need to know to learn blockchain

First we need to understand the relevant content of network communication, followed by data storage, encryption technology, consensus mechanism and security technology, and finally cross- On-chain technology and off-chain technology. I personally think that learning about blockchain should start from practice. If you are a programmer, you can go to a blockchain-related company to get in touch with related businesses and learn on the job. I used to work at Xuanling Technology, and the company’s strength and experience in blockchain development are very good, making it a good candidate for both work and cooperation.

⑥ Blockchain technology empowers Web3.0

Web3.0 will be a value Internet, and its openness, trust establishment and identity management are similar to Web2.0 Big difference. The development of blockchain has just established the basic technical foundation for Web3.0 and will play a key role in Web3.0. In Web3.0, blockchain-related technologies include: peer-to-peer network technology, data storage and exchange systems, digital identities, blockchain-based financial networks, blockchain-based trust systems and smart contracts, etc.

Web 3.0 was originally coined by Tim Berners- the inventor of the World Wide Web (WWW).Lee calls it the Semantic Web, and its goal is to become a more autonomous, intelligent and open Internet. The definition of Web 3.0 can be expanded as follows: Data will be interconnected in a decentralized manner, which will be a huge leap from our current Internet. In Web 2.0, data was mainly stored in centralized repositories. Additionally, users and machines will be able to interact with the data. To do this, the program needs to understand the information conceptually and contextually. With this in mind, two cornerstones of Web 3.0 are the Semantic Web and artificial intelligence (AI).

From the perspective of users (users), Web3.0 and Web2.0 will be improved in many aspects in terms of presentation and experience. The following features are some of the aspects recognized by the industry: < br />
At the same time, with the development of network capabilities, artificial intelligence, and the explosive growth of data, the construction of Web3.0 networks will be a disruptive development for Web2.0, which reflects Web 3.0 will inevitably be an open, trustless, permissionless network, thereby realizing the true vision of the Internet.

Web3.0 will be a value Internet, and its openness, trust establishment and identity management are very different from Web2.0. The development of blockchain has just established the basic technical foundation for Web3.0 and will play a key role in Web3.0. In Web3.0, blockchain-related technologies include: peer-to-peer network technology, data storage and exchange systems, digital identities, blockchain-based financial networks, blockchain-based trust systems and smart contracts, etc.

Peer-to-peer network system: P2P Networking

The network architecture adopted by Web1.0 and 2.0 revolves around the architecture of the core network, access network and local area network. Such a network is basically a star structure, with data exchanged from the end up through the access network to the core network, and then routed down to its destination address. Internet applications rely on relatively centralized computing and storage. Once the network fails or is overwhelmed, service failure will occur immediately. Service failures of Internet giants are common and have huge impacts.

The Web3.0 network will be more flexible, and data communication will be more based on point-to-point networks. Point-to-point networks rely on the existing architecture of Web2.0 as infrastructure, and virtualization will be built on top of it. P2P network layer. Each user node/terminal is connected to multiple terminal nodes at the same time, and network communication occurs through direct connections between terminals or through third-party relays. Such a connection has many benefits, such as: nodes can obtain information from multiple paths at the same time, so the data access speed can be more efficient; when there are multiple copies of data, information can be obtained from the nearest node, and network resource utilization is high ;Tolerance for network failuresGreatly improved, some network failures will not affect the communication effect; the network links are abundant and the data transmission speed is very fast.

Peer-to-peer networking is also the basis for ensuring other features of Web3.0, which we will describe in the following sections. LibP2P is currently a relatively mature peer-to-peer network technology. Networks including IPFS, Filecoin, Ethereum2.0 and other platforms that provide services for Web3.0 are all built on LibP2P.

Terminals using point-to-point networks need to continuously maintain and maintain a large number of network links, and can intelligently perceive network problems and resist malicious links and attacks. This brings challenges to the development of P2P networks. At the same time, the P2P network is built on the basis of the existing network and requires comprehensive support for existing network protocols. Affected by the network scale effect, the development of the P2P network will first start with the technical facilities related to the blockchain and gradually Expand to a wider area.

Data storage and exchange system - The Underlying File System

Web1.0 and Web2.0 are built on the HTTP protocol. The HTTP protocol provides a simple file access method through path (URL), and users can access files and web content through URL.

HTTP is a client/server communication protocol, which forms the basis for almost all data exchanges on the current Internet. The term client-server means that there is a requesting party (the client - usually a web browser) that requests information from the server (the computer that provides the information - usually a web page or part of a web page). This protocol relies on Domain Name Server (DNS) servers to locate file paths. The DNS server itself is a large network that includes thirteen root servers, as well as numerous zone servers linked down. The DNS service network itself is a centralized network, and some attacks are directly targeted at the DNS network.

With Web 3.0, this mechanism is changing. The technology most likely to replace the current DNS system is called the InterPlanetary File System, or IPFS for short. When HTTP is gradually replaced by IPFS, indeed, we may be inclined to call it Internet 3.0.

The IPFS network also needs to address files (content), but completely different from the HTTP protocol in that the addressing service of IPFS no longer relies on centralized services like the DNS network, but Completely through decentralized distributed hash table (DHT: Decentralized Hash Table). The network layer of IPFS is LibP2P, so it can provide greater flexibility and fault tolerance. At the same time, IPFS draws on many technologies from peer-to-peer file systems to form a complete set of protocols, including: BitTorrent, Git, SFS, etc.

The implementation principle of IPFS's content addressing method is very simple, which is to perform a hash operation on the content to generate a unique content identification (CID: Content Identity) related to the content. The anti-collision feature of the Hash algorithm ensures the uniqueness of the identification, so this identification is also called a content fingerprint; the certainty of the Hash algorithm ensures that the same content will generate the same identification, so in the same storage network, it can Content is deduplicated to achieve higher storage efficiency.

The goal of IPFS is to build a unified, decentralized storage platform that does not rely on a single entity, which is in line with the idea of ​​​​blockchain. Compared with HTTP, IPFS has many advantages:

These characteristics of IPFS form the basis of Web3.0 data storage. Therefore, these characteristics of IPFS also become the characteristics of Web3.0. The IPFS network has been successfully operating for several years. As a public welfare, open, and open source network, its operation is very successful. However, for commercial operations, due to the lack of incentive layer and the difficulty in coordinating the service guarantee system of distributed nodes, there are still problems. There are many challenges, and these challenges are also what storage-related projects such as Filecoin hope to solve.

Digital identity based on cryptography - Digital Identities

Digital identity is another important technology brought about by the development of blockchain. It may become one of the most important features of Web 3.0. In today's internet, everything from identity theft to click fraud is rife, and it happens because the connection between two computers is not authenticated properly. In a Web 2.0 network, a server can never be sure that the client software accessing it is pretending to be a browser under the control of an identifiable human being. On the other side of the equation, the browser also doesn't know if the server and file it's accessing are the ones it intended to access.

However, it is much more difficult to commit fraud and deceit if everything involved in this interaction has a verifiable identity. With digital IDs, each person has a verifiable identity because each identity must be linked to a unique credential. Likewise, organizations have a verifiable identity. As for everything else involved in the interaction between client and server (hardware and software), these things can be tied directly to a unique ID belonging to a person or organization. and,Thanks to technologies like zero-knowledge proofs, it is possible for any party to prove that they are authentic without even revealing their identity.

Digital ID enables two important functions of Web 3.0:

The very important reason for this is that user identity authentication and behavior verification are unified, and encryption technology is applied to each user. One message greatly improves security. Of course, these also increase the cost of terminal use, and the truth is always higher than the magic. As computing technology advances, the strength and algorithms of encryption will evolve, and security also relies on users protecting their private keys.

Based on blockchain financial network - Decetralized Finance

So far, we have mentioned two technical foundations: distributed file system and digital identity, both related to blockchain Chain technology related. The importance of blockchain to Web3.0 is self-evident, but its most important contribution lies in its ability to create tokens and maintain the network through carefully designed economic models, including the use of such tokens for governance. The ability to make small payments.

In a blockchain-based Web3.0 network, the way finance operates is very different from traditional finance. Finance is more programmed and changes more quickly and quickly. There is no need for banks and institutions to endorse it. The financial market is also an algorithmic market. Here, there are not only tokens with value storage that can store and transfer high amounts of value, but also small payment capabilities for fast transactions similar to the Lightning Network. Different tokens provide different functions. What is even more exciting is that the entire financial market is completely an algorithmic market and is not controlled by institutions. Therefore, algorithm-based equity trading, lending markets, non-stop real-time trading, insurance, futures, etc. can all be constructed. And continue to innovate.

Regarding the value of information, Web3.0 is completely different from Web2.0. Due to tokenization, the value of information can be directly reflected in transactions, realizing the unification of value flow and information flow. Unlike the free services in Web 2.0, which are full of illusions, service providers actually make profits through advertising and mining the value of users' data in a roundabout way.

Networks build trust - Trustless

One might argue that the most important contribution of blockchain is automated trust. This goes beyond the security that blockchain can provide through digital IDs by building a network of trust.

Some blockchains can create "smart contracts," programs that are attached to the blockchain and executed when specific blockchain events are triggered. The important thing about smart contracts is that the program code is the contract.

This makes smart contracts more deterministic than legal contracts. LawLegal contracts are enforced through the legal system, whose reliability varies from place to place but is never perfect. The outcome of challenging a legal contract is uncertain.

However, smart contracts can be 100% trusted. A simple example of a smart contract is given by the movement of goods in a supply chain. Items are shipped with an RFID tag that reports the location of the item when it is read. Smart contracts can automatically execute payments when goods arrive at a specific location - shipping, warehousing or import duties. Therefore, payments are predictable and can be happened with 100% confidence.

Naturally, smart contracts can be much more complex than this example. They can cover many situations that legal contracts currently cover, reducing the possibility of fraud.

⑦ Blockchain - What is the blockchain? Jindian Bixin can understand the blockchain

Blockchain - What is the blockchain? Can Jindian Coin News understand the blockchain?

Block Pioneer animation video helps you understand what is blockchain, easy to understand

What is blockchain, does Maobei belong to blockchain?

Answer: Maobei does not belong to the blockchain, but only uses blockchain technology. The characteristic of the blockchain is that everything that happens will be recorded and cannot be deleted or changed.

Blockchain, what is a block

Comprehensive interpretation of blockchain

When talking about blockchain, people always compare it with Bitcoin. On October 31, 2008, a person named "Satoshi Nakamoto" sent an email to a cryptography email group, claiming, "I have been working on a new electronic cash system, which is completely peer-to-peer and does not require Any trusted third party.” He launched a new system using Bitcoin as the transaction currency.

What is blockchain technology? What is blockchain?

Blockchain is a distributed shared accounting technology. What it wants to do is to allow all parties involved to establish a trust relationship at the technical level.

Blockchain can be roughly divided into two levels. One is the underlying technology of the blockchain; the other is the upper-layer application of the blockchain, that is, transformation based on the blockchain, Optimize or innovate applications.

What is the core meaning of blockchain? Our understanding is that the core meaning of blockchain is to establish data credit among participants, and to create a single transaction under clear regulations through unilateral confrontation. The ecology of all aspects jointly guarantees complete opportunities. This is a system. This establishment can end the problems before the blockchain. Before the blockchain, it was impossible to achieve new sharing when data was shared, even if it was targeted. It just gives you an interface. After the blockchain is established, the participants can realize the sharing of credit.

What are the underlying platforms of blockchain?

Answer: There are mainly the following categories:

1. Bitcoin. The earliest blockchain development was based on the Bitcoin blockchain network.Developed, because Bitcoin is the most widely used and truly decentralized in the world, in terms of blockchain applications, Bitcoin is the most powerful anchor in the world and has the greatest authority.

2. Ethereum. It can be said that apart from Bitcoin, Ethereum is currently the most eye-catching blockchain platform. Ethereum is a Turing-complete blockchain one-stop development platform that uses multiple programming languages ​​to implement protocols. It uses a client written in Go language as the default client (i.e., the method of interacting with the Ethereum network, and supports many other language client).

3. IBM HyperLedger. Also called fabric, its goal is to build a super ledger that is jointly maintained by the whole society. Fabric originated from IBM. Its original intention was to serve industrial production. IBM open sourced 44,000 lines of code, which is a great contribution and allows us to have The opportunity is so close to explore the principles of blockchain that are different from Bitcoin.

4. LISK. It is a new generation of blockchain platform that allows the development of JavaScript (Javascript technology again, engineers, take note) and distribution-based decentralized applications using an easy-to-use, full-featured ecological blockchain system.

5. Online recording blockchain platform. It is the research and development result of the underlying technology of the Wanglu blockchain and a basic platform capable of commercial delivery. In addition to serving the Wanglu public chain, the Wanglu blockchain platform is also the basic platform for Wanglu to create private chains and alliance chains for customers.

What is blockchain? What is blockchain for digital currencies?

In a narrow sense, 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-forgeable. 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 paradigm that uses smart contracts composed of code to program and manipulate data.
Nowadays, mainstream digital currencies are basically developed based on blockchain technology. Blockchain is the underlying technology of digital currency. The domestic tea-based digital currency Puyin was developed based on blockchain technology.

What is blockchain

The essence of blockchain is a decentralized accounting system, and Bitcoin is the currency that "exists in digital form" carried on this system. Blockchain is a system behind Bitcoin that consists of credit records and the settlement of credit records.

Blockchain is a new application model of computer technologies such as distributed data storage, point-to-point transmission, consensus mechanism, and encryption algorithm. The so-called consensus mechanism is the mathematics used to establish trust and obtain rights and interests between different nodes in the blockchain system.Algorithm [1].
Blockchain is an important concept of Bitcoin. The "2014-2016 Global Bitcoin Development Research Report" released by Huobi.com, Tsinghua University PBC School of Finance Internet Finance Laboratory and Sina Technology mentioned the area. Blockchain is the underlying technology and infrastructure of Bitcoin [2]. It is essentially a decentralized database and serves as the underlying technology of Bitcoin. Blockchain is a series of data blocks generated using cryptographic methods. Each data block contains information about a Bitcoin network transaction, which is used to verify the validity of its information (anti-counterfeiting) and generate the next block< br /> The evolution of blockchain is:
▪ Blockchain 1.0 - digital currency
▪ Blockchain 2.0 - digital assets and smart contracts
▪ Blockchain 3.0— —IFMChain, blockchain officially links mobile terminals