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1. What are the well-known blockchain APPs? I heard that blockchain is very popular recently. Can anyone help answer the questions?

List a few famous blockchain APPs. :
Internet Letts Dog, Internet Totem, Internet Universe, 360 Illustration, NetEase Planet, Xiaomi Crypto Rabbit, Virtual Earth, Block City DreamWorld...
Of course this is only part of it, many are interested You can search it yourself

2. Which Ethereum trading platform is good

AOFEX is a better trading platform with a good reputation and millions of registered users. Their The risk control team has rich experience in financial risk control management and can ensure the safety of your transactions. . If you have any questions in this regard, you can ask at any time

3. What are blockchain apps

There are also many blockchain-related apps, such as exchanges, wallets, games, etc. Wait, let’s see what aspect you want to know? A blockchain app alone does not provide much information. Related blockchain information can be found at Crypto Finance.

4. What are the dapp blockchain applications, and what are the practical applications of blockchain?

Hello, I am Naughty Bag, the editor of Blockchain Blue Ocean, and I am very happy to answer you. this problem. In your statement, a total of 2 questions were asked, and we will answer them one by one.

It can be said that we are still in the exploratory stage of blockchain technology. How can some technical principles be applied? In other words, how to realize implementation value? It is also necessary for individuals to improve their comprehensive understanding of the blockchain through professional learning and training in order to fully grasp the opportunities.

It is recommended that the questioner can go to a professional education platform like "Blockchain Blue Ocean" to comprehensively improve themselves through science popularization, industry development trends and other aspects.

5. In the 3.0 era of blockchain, how to play the blockchain app

If Bitcoin represents the blockchain version 1.0, it proves to the world that digital currency can accomplish. Then Ethereum represents the 2.0 version of the blockchain, letting everyone know more about how to play the blockchain, decentralized applications and smart contracts. In 2018, blockchain will enter the 3.0 stage. Applications and scenarios will be the core of blockchain. Applications based on blockchain will spring up in various industries. This will be the last stage of blockchain development. early bonus period. The demand for talents driven by the application of blockchain technology has been increasing. Blockchain technology talents have become an upstart profession, highly competitive, and also have enviable high salaries.

More and more large companies are entering the blockchain industry, and Dufeng Huanlv strives to become the "leader" in this emerging field. Among them, Alibaba, SF Express, JD.com, etc. have all hired technical talents in the blockchain field with high salaries. In this information age with the Internet as the core, the competition among large companies is ultimately the competition for talents. Especially in the early days of the emerging blockchain technologyWhen they are showing their talents, blockchain technical talents are “in hot demand” whether at home or abroad. As a "young" technology, the main force for future development is bound to be young people. However, many current practitioners in the blockchain industry are self-taught and have no systematic professional knowledge training, or are just cryptography, programming, and the Internet. Technical and other unilateral talents. Blockchain technology values ​​​​more complex talents with multiple technologies. In the future, with the maturity of the application of blockchain technology, talented people will become more popular to "recharge" themselves and devote themselves to the blockchain. Be prepared for the heat. In addition to participating in blockchain development work, what else can help you catch up with the blockchain train? Investing in blockchain projects is obviously another approach. So how to judge whether a project is a real blockchain or a fake blockchain?

Is the cost of confirming the authenticity of information in this field very high? For example, there is a Christian coin project, which uses the blockchain to record the time people read the Bible, and then issues Christian coins to these people. Let’s not discuss it for now. Is it meaningful to count the time people spend reading the Bible? Even if it is meaningful, this can be solved using other models. For example, when checking in in a WeChat QQ group, why should we develop a blockchain smart contract and imitate the blockchain? I'm afraid I'm just cutting leeks to keep warm. So what are the areas where it is difficult to confirm the authenticity of information? The most typical one is finance. There is a large amount of information asymmetry in financial markets, which makes the market full of uncertainty. For example, when transferring money, you won't know until the bank tells you that it has arrived. Now blockchain technology can solve such problems better and faster. Similar information confirmation issues such as market data, credit, contracts, etc.

Whether a meaningful large-scale consensus is formed: One of the outstanding advantages of the blockchain is that it can effectively form a large-scale consensus through public ledger accounting and notification to the entire network. Nowadays, for many projects, there is no need to form a network-wide consensus. Some are just for crowdfunding and issuing tokens. The blockchain consensus of the project is meaningless. Does this model have a network effect? ​​The network effect means that a project will become more valuable as the number of project users increases, because the value of the project does not lie in the users themselves, but in the connection network between users. Bitcoin is a classic example. The more user nodes there are, the links between nodes will grow exponentially, and the entire Bitcoin ecosystem will be more valuable.

Of course, in addition to these points, there are many basic principles for judging projects, such as effective incentive mechanisms, strong teams, project solutions to pain points, etc.

6. Which blockchain app have you used that is easier to use? Can you recommend a reliable one?

You can download the "Biting" APP, a software for live answering questions. They 12 questions will be shared every day, and the questions inside are all about blockchain-related knowledge. A must for beginners! I am also studying, so let’s work together~

7. Ranking of the top ten blockchain mining apps

The ranking of mobile mining apps is as follows:

1 , ETH mobile mining. ETH handMachine Mining is a software that allows you to make money through mobile mining. Users can trade with confidence in this software. All transaction information is open and transparent, and the latest monetary policies can be seen every day.

2. HBC environmental protection chain. HBC Environmental Chain is a very easy-to-use investment and financial management app. Users can redeem environmental coins by completing mining tasks, and the mining gameplay provided here is very simple.

3. Fire brush horizon mining. Fire Brush Vision is a brand new blockchain money-making platform, where users can directly receive tasks and complete tasks to obtain rewards. There is no need to invest or energy, and they only need to use their spare time to purchase mining machines. That's it.

4. ABEL trading platform. A professional mobile phone mining software, users can easily obtain a variety of digital currencies here, and can also conduct various digital currency transactions here at any time.

5. Secoin Star Ecology. A very easy-to-use mobile mining software that provides users with a very convenient and easy-to-use mining machine. They only need to use some daily rest time to obtain a variety of digital currencies.

Mobile mining is very simple. Just download the APP and register an account. The ways to obtain rewards are similar. If you want to use this mobile mining APP and increase your computing power, you must use facial recognition, Alipay, and Taobao authorization. , Xuexin.com authorization, operator authorization, JD authorization, binding GXS wallet, backup wallet, inviting friends, and checking in online every day.

Possible disadvantages of mobile phone mining:

1. Stealing user privacy. Some apps pretend to be mining, but are actually collecting user information and C-side traffic, which may cause problems such as user information leakage.

2. Greatly shorten the life of mobile phones. For mobile phones with mining systems installed, apps quickly drain battery power, generate excessive heat, or put unnecessary pressure on device resources.

3. The most important thing is that mobile phone mining is actually mining for candy, and mainstream coins cannot be mined. It is difficult to mine mainstream currencies with mobile phones. Nowadays, mainstream currencies such as Bitcoin and Ethereum cannot be mined with the computing power of mobile phones.

8. There are many blockchain applications now. What are good blockchain applications? Where can I learn more about them?

I want to know about blockchain. For application, you can refer to many books and opinions, including "Blockchain in Pictures", "Blockchain: Reshaping the Economy and the World", "New Economic Blueprint and Introduction", as well as articles from the Binance community, including this article on the Binance community I also know the platform in detail and its strength is awesome.

1. What is blockchain

Blockchain, as the name suggests, is composed of blocks and chains. It is a distributed data storage , point-to-point transmission, consensus mechanism, encryption algorithm and other new application models of computer technology. It is a chain data structure that combines data blocks in a sequential manner in chronological order, and is encryptedAn untamperable, unforgeable, safe and trustworthy distributed ledger guaranteed by coding methods.

In 2008, Satoshi Nakamoto first proposed the concept of blockchain and encrypted digital currency in his paper "Bitcoin: A Peer-to-Peer Electronic Cash System". Starting from Bitcoin, blockchain has become the underlying technology of various digital currencies.

2. The working principle of blockchain:

1. Basic concepts include:
(1) Transaction: one operation will change the ledger status once , such as adding a record;
(2) Block: records transactions and status data that occurred within a specified time, which is a consensus and preservation of the current ledger status;
(3) Chain ( Chain): It is composed of blocks connected in chronological order and is a log record of the entire state change.
Understanding the working concept of blockchain, it is not difficult to understand its working principle. Suppose there is a distributed data record book. This record book only allows additions, deletions and changes. Its structure is composed of individual data records. A linear chain formed by "blocks" connected in series (this is also the origin of the name "blockchain"). To add new data, it must be placed in a new block. The maintenance node can propose a new block. However, a certain consensus mechanism must be used to reach agreement on the final selected block.

2. Take Bitcoin as an example to see how the blockchain works.

Bitcoin blocks are divided into two parts: block header and block body.

3. Core advantages and characteristics of blockchain

1. Decentralization
Block The processes of verification, accounting, storage, maintenance and transmission of chain data are all based on the distributed system structure. There is no centralized hardware or management organization. The rights and obligations of any node are equal. The data blocks in the system are composed of Nodes with maintenance functions in the entire system are jointly maintained.
2. Open and transparent
The system is open. In addition to the private information of the transaction parties being encrypted, the blockchain data is open to everyone, and anyone can query the blockchain through the public interface. Data and development related applications, so the entire system information is highly transparent.
3. Security
The blockchain adopts consensus-based specifications and protocols (such as a set of open and transparent algorithms) to enable all nodes in the entire system to exchange data freely and securely in a trustless environment. , so that trust in "people" is changed to trust in machines, and any human intervention has no effect.
4. Information cannot be tampered
Once the information is verified and added to the blockchain, it will be stored permanently. Unless more than 51% of the nodes in the system (almost impossible) can be controlled at the same time, otherwise Modifications to the database on a single node are invalid, so the data stability and reliability of the blockchain are extremely high.
5. Anonymity
Due toThe exchange between nodes follows a fixed algorithm, and the data interaction does not require trust (the program rules in the blockchain will judge whether the activity is valid by itself), so the counterparty does not need to disclose its identity to make the other party trust itself. The accumulation is very helpful.

4. Classification of Blockchains

Currently, the most mainstream classification of Blockchains is to divide Blockchains into Public Blockchains based on different participants. ), Private Blockchain and Consortium Blockchain.

1. Public chain: Anyone can participate in the use and maintenance, and can obtain effective confirmation of the blockchain. The public chain is the earliest blockchain and the most widely used blockchain at present. , typically such as the Bitcoin blockchain, the information is completely public.

If a permission mechanism is introduced, it will include private chain and alliance chain.
2. Private chain: A company or individual only uses blockchain technology and has exclusive write permission to the blockchain, and the information is not made public. At present, conservative giants (traditional finance) all want to experiment with private blockchains, and the application products of private blockchains are still being explored.
3. Consortium chain: It is a blockchain between the public chain and the virtual chain, jointly controlled by multiple organizations. The use of this chain is managed with authority and can be controlled by managers and also based on The manager's wishes are open to others.
In addition, according to the different usage scenarios and purposes of blockchain, it is divided into currency chains for the purpose of digital currency, property rights chains for the purpose of recording property rights, crowdfunding chains for the purpose of crowdfunding, etc. .

5. Analysis of specific application scenarios of blockchain

1. Information anti-counterfeiting

On May 28, Tencent CEO Ma Huateng spoke at the Guiyang Digital Expo The problem of Moutai anti-counterfeiting has been raised: the anti-counterfeiting method based on cloud-based comprehensive blockchain technology will be much more efficient than traditional anti-counterfeiting methods. In future anti-counterfeiting verification scenarios, users may only need to perform a simple scan with their mobile phone to obtain a large amount of complete information based on different dimensions.

Take Moutai as an example:

Distillery address, production workshop, operating employees, inspectors, factory time, transportation vehicle information and driver information,

The vintage source of raw materials for wine, raw material suppliers, storage warehouse numbers, raw material transportation vehicles and driver information,

All information can be accurately traced, permanently recorded and cannot be tampered with.

The authenticity can be easily verified based on the above information.

2. Food safety issues

As early as November last year, Walmart had cooperated with IBM to ensure food safety by using blockchain technology to track food sources. and increase the circulation of food to reduce costs. For large supermarkets such as Wal-Mart, in the past, when food safety problems occurred, it took several days to investigate the source of the problematic food., after using this technology, only one piece of information about the product is needed to achieve accurate traceability. Important information such as food origin, inspector, supplier, logistics and transportation, etc., and problems can be quickly discovered within a few minutes. Currently, products tracked using blockchain include packaging products in the United States and pork in China.

3. Information Security

Blockchain technology is promoting a revolution in information security technology. Three major security threats: man-in-the-middle attack, data tampering, and DDoS

(1) Identity protection

PKI is a common public key encryption used in various communication applications such as email, messaging applications, and websites. technology. However, since most PKI implementations rely on a centralized trusted third-party certification authority (CA) to issue, activate and store user certificates, hackers can attack PKI to fake user identities or crack encrypted information.

CertCoin is the first blockchain PKI implementation, coming from MIT, which removes the centralized certification center and uses the blockchain as a distributed ledger of domain names and public keys.

Pomcor Company: Blockchain PKI implementation path: retain the certification center and use the blockchain to store hash values ​​of issued and activated certificates. Users can verify the authenticity of certificates through decentralized and transparent sources, while also improving network access performance through local authentication of keys and signatures based on blockchain copies.

(2) Data integrity protection

GuardTime has developed a keyless signature architecture (KSI) based on blockchain technology to replace key-based data authentication technology. KSI stores hashes of the original data and files on the blockchain, runs hashing algorithms to verify other copies, and compares the results with the data stored on the blockchain. Any tampering with the data will be quickly detected because the original hash table is stored on millions of nodes.

(3) Protection of critical infrastructure

The "Achilles' heel" of the Internet, DDoS has entered the TB era, and DDoS is still the easiest way for hackers to defeat large targets at low cost. As a weapon, DNS services are the primary target for hackers to carry out large-scale damage, but blockchain technology is expected to fundamentally solve it.

The distributed storage of blockchain makes hacker attacks lose focus. Nebulis is developing a distributed DNS system using the Ethereum blockchain and the InterPlanetary Internet File System (IPFS, a distributed alternative to HTTP product) to register and resolve domain names. The biggest weakness of DNS is caching. Caching makes DDoS attacks possible and is also the bane of centralized governments censoring social networks and manipulating DNS registrations. A highly transparent, distributed DNS system can effectively prevent any entity, including the government, from manipulating records.

IV. Financial Industry

(1) Digital Currency: Improving the convenience of currency issuance and use

For example, foreign Bitcoin and Ethereum, our country currently There are Nuo Compao and so on.

From physical transactions to physical currencyand credit currency, and then to the rise of the Bitcoin network, more people are aware of the distributed ledger blockchain technology behind it, and it is gradually being applied in many scenarios outside of digital currency.

(2) Cross-border payment and settlement: realize point-to-point transactions and reduce intermediate costs

Transfer and payment. At present, the most mature application of blockchain technology is payment and transfer. Blockchain technology can avoid complicated systems, save the process of inter-bank reconciliation and review, and speed up settlement; using virtual currency does not require the intervention of a clearing house, reducing transaction fee. The clearing procedures of each country are different. It takes 2 or 3 days for a single remittance to arrive, which is inefficient and accounts for a large proportion of funds in transit. No longer going through a third party, point-to-point payment is formed through blockchain technology. Eliminating the need for third-party institutions, you can make payments throughout the day, receive money in real time, quickly withdraw cash, and reduce hidden costs, helping to avoid financial risks. It is timely and convenient.

(3) Bills and supply chain financial business: reduce human intervention, reduce costs and operational risks

Point-to-point value transfer, physical bills or central system for control and verification; intermediary will be eliminated and human intervention reduced. Improved efficiency, smoother financing channels, lower risks, and benefits for all parties.

(4) Securities issuance and trading: realize quasi-real-time asset transfer and accelerate transaction clearing speed

The application of blockchain technology can make the securities trading process simpler, more transparent and faster , Reduce IT systems with repetitive functions and improve the efficiency of market operations. For stocks, blockchain can eliminate paper and pen or spreadsheet records, reduce human errors in transactions, and improve the transparency and traceability of trading platforms. Citi and Nasdaq collaborate to advance blockchain applications.

(5) Customer credit reporting and anti-fraud: reduce legal compliance costs and prevent financial crimes

Customer information and transaction records recorded in the blockchain help banks identify Abnormal transactions and effectively prevent fraud. The technical characteristics of blockchain can change the existing credit reporting system. When banks perform "know your customer" (KYC), the data of customers with bad records will be stored in the blockchain.

Equity crowdfunding: Equity crowdfunding based on blockchain technology can achieve decentralized trust and investors’ returns are guaranteed.

5. Supply chain management

Distributed ledger system, participants track the ownership of assets throughout the process, and can be used to track auto parts when moving between countries and factories.

Toyota is developing blockchain technology solutions for its core parts supply chain operations. Using a large amount of data helps Toyota more efficiently ensure the accuracy of recorded data and can also help manage the supply chain. At the same time, the blockchain supply chain can control warranty, repair goods-related costs and specifications through smart contracts, and transactions throughout the product life cycle are irrevocable.

The shipping industry’s first public solution, deployed by Maritime Transport International (MTI), uses blockchain supply chain technology to share the Verified Gross Volume (VGM) of shipping containersinformation. Information about container VGM is important to ensure ships are properly stowed and to prevent accidents at sea and in ports. VGM data is stored on the blockchain supply chain, providing a permanent record for port officials, shipping companies, shippers and cargo owners. This replaces cumbersome logs, spreadsheets, data brokers and private databases.

Logistics Integrity System Wagonbang Wagonbang launched a blockchain-based financial solution for logistics enterprises, aiming to provide enterprises with reliable financial services. It can not only help drivers solve the problem of loan difficulty, but also change the current situation of lack of integrity in the industry and help build a logistics integrity system. Help build the identity chain of logistics companies and create a trusted data ecosystem for logistics companies. Using a transparent, supervisory, and traceable algorithm model, we screen reliable companies that need financial support and provide them with financial services. On the other hand, at the technical level, various law enforcement departments are linked to jointly punish dishonest companies.

6. Government management

(1) Election

Based on the characteristics of blockchain technology and considering the shortcomings of current election technology, we will build an open source , Blockchain applications for elections, voting and lottery, we call it ElectionChain. We hope to optimize election and voting technology to make voting more open and transparent, reduce human manipulation, and allow voters to verify their election results.

Including identity authentication, multi-chain system, flash investment protocol, consensus algorithm EDPOS, privacy protection, voting mechanism design, decentralized ELC rental market, storage solutions, smart contracts, etc.

(2) Government services

Aiming to realize an e-government digital ecosystem based on blockchain technology and provide citizens with government services and an automated mechanism for the business of various government departments, it must be All areas of national government affairs are combined to form a common information space, including government agencies, economic data, financial transactions and social fields. This ecosystem should also include registries and corresponding software for building smart contract-based applications and platforms for government agencies, businesses and public users.