健康码是区块链的应用吗知乎,健康码是区块链的应用吗

区块链是一种分布式数据库技术，它可以记录任何类型的数据，包括金融交易、智能合约、供应链管理等。它最大的特点是所有的记录都是不可篡改的，因此可以用来追踪货物的流转、记录金融交易等。区块链技术的应用越来越广泛，它已经被广泛应用于金融、物流、政府、医疗等各个领域。

健康码是一种基于手机的健康追踪系统，它可以帮助用户记录和跟踪自己的健康状况，包括从健康检查到运动记录，以及其他健康相关的信息。它可以帮助用户更好地管理健康，并及时发现健康问题。

区块链健康码是一种基于区块链技术的健康码，它可以帮助用户更好地记录和跟踪自己的健康状况。与传统的健康码相比，区块链健康码具有更高的安全性和隐私性，因为它使用了区块链技术，所有的信息都是不可篡改的，而且可以在多个机构之间安全地共享数据。此外，区块链健康码还可以帮助用户更快地获取健康检查报告，更加准确地跟踪健康状况，以及更好地管理健康。

1. Application analysis of decentralized DID identity authentication

The purpose of decentralized DID is to support sharing in multiple networks while protecting user privacy. ID to achieve interoperability and build a better web ecosystem. The previous chapter, Technical Analysis of Decentralized DID Identity Authentication, introduced the basic technical principles of DID. In this chapter, we briefly describe several DID usage scenarios.

Nowadays, people are accustomed to scanning QR codes on WeChat to log in, or logging in with Alipay authorization, etc., so that they can log in directly to third-party websites using WeChat accounts and Alipay accounts. Therefore, our personal information is kept by WeChat and Alipay. We believe that these large websites will not crash or leak our data. However, the phenomenon of "big data killing familiarity" is a counterexample. Websites use our data to control our payments. This is a drawback of centralized management of user information.

Take the registration of primary school students as an example. When registering, parents need to show their household registration book (to prove that the child has a local household registration and is indeed the parent’s child), and a real estate certificate (to prove that the house belongs to the parent and the child belongs to the parent). The house does belong to the school district to which it belongs) plus other marriage certificates, vaccination certificates, etc. These certificates are all in paper form and have been stamped and confirmed by the relevant departments. It's just that it's very troublesome to use. Parents need to bring all the documents. If they are lost, it is very cumbersome to replace them.

The "Guangdong Health Code" and "Macau Health Code" interoperability project implemented by WeBank is based on blockchain + DID technology to achieve cross-border identity authentication, allowing mainland tourists to Macau to In addition to providing nucleic acid certificates, you only need to apply for the "Guangdong Health Code" to easily pass the customs. There is no need to fill in the Macao local health code again.

Let’s take buying a house as an example again. In the early stage of buying a house, the sales office will ask the buyer to present a proof of funds (for example, a deposit of >5 million). In this case, the buyer will need to transfer funds from several banks. Move to a bank, collect 5 million, and then issue a certificate to the sales office. For home buyers, moving funds back and forth between several banks is a loss and the amount is also revealed.
It will be much more convenient if DID is used (the premise is that multiple banks, home buyers, and sales offices have already registered DID on the blockchain), the process is as followsAs shown in the figure.
The home buyer has bank deposit certificates VC given by multiple banks. He can combine the amounts in these VCs, then add the zero-knowledge proof ZKP proof to hide the specific amount, and convert it into VP after signing. To the sales office. After the sales office verified the correctness of this VP and the proof of zero-knowledge proof ZKP, it was confirmed that the home buyer had more than 5 million in funds, but did not know the specific amount.

With the expansion of the types of IoT devices, the data of the Internet of Things has gradually become richer, but the security of the Internet of Things devices and the credibility of the Internet of Things data have gradually attracted people's attention.
If IoT devices can be identified with DID, the security of IoT devices can be controlled and the credibility of the data can be confirmed from the source.
Taking machines in a factory as an example, each machine is assigned a DID by its manufacturer. When the machine is running, a large amount of production data will be generated. These production data (non-sensitive) can be signed, and the data, signature results and DID are saved on the blockchain.
The manufacturer of the machine can know the operating status of the machine based on the data on the chain, which facilitates better after-sales maintenance services.
When an enterprise needs a loan, the bank can judge the production and operation status of the enterprise and assess the loan risk based on the production data on the blockchain and the endorsement of the machine manufacturer. (This can also be regarded as a scenario where blockchain is used across multiple organizations)

Take cloud disk data sharing as an example. If I want to send some photos on the network disk to publishers, just Apply for a link on the cloud disk, add an access password, and give it to the publisher for access. The publisher can retrieve the photos with this number, but the password may be reused by others, causing my photos to be leaked.
Using the DID method, data can be shared with users relatively safely, as shown in the figure below (premise: the data custodian, data party, and user have all registered DID on the blockchain).

This chapter briefly introduces several usage scenarios of DID, which I have collected so far. But what you learn on paper is ultimately shallow. In the future, you can try a variety of DIDs and discover more real applications.

2. What is blockchain? In addition to food traceability, what other common applications does blockchain have?

To save production and distributor costs, use blockchain technology and The Internet of Things can realize automated data collection and storage, reducing labor investment and other equipment investment; in addition, the application of blockchain technology and the Internet of Things can help manufacturers and distributors reduce various expenditures and reduce the price of agricultural products, thereby achieving Customer profit.

The key to blockchain technology is a distributed digital ledger that can store all types of information, including cryptocurrency transactions, NFT usage rights, and DeFi blocks chain.

Although any traditional database system can store this information, digital currency is unique in its complete blockchain technology. In contrast to systems maintained in a core organization by central administrators (such as Excel spreadsheets or bank database systems), blockchain databases have many identical copies stored on multiple computers that exist on the network, but these independent electronic Computers are called connection points.

The name "blockchain technology" is not a whim. Data ledgers are generally described as "chains" composed of separate "data blocks". When new data is imported into the network, a new "block" is created and added to the "chain," which involves all nodes updating their versions of the blockchain ledger so that they are the same.

3. Henan Epidemic Prevention and Control Headquarters reiterates: The health code is only used for epidemic prevention and control. How to prevent the health code from being used for other purposes

Henan Province’s epidemic prevention and control inspections The command and leadership group reiterated that the health code can only be used for epidemic prevention and control, and how to prevent the health code from being used in other ways requires the following relevant measures:

The health code can be used The database is encrypted. The personal data of all residents after scanning the code will be directly stored in the relevant database. Therefore, the health code database can be encrypted, and no one or any unit can tamper with the health code privately. If there is any malfunction in the health code, it can be repaired and improved by the dedicated staff of Anzaozhapai. As long as the core data has not been tampered with, basically the health code will not be used for other purposes, nor will it be used for certain purposes. A tool for people to obtain unfair profits.

4. Blockchain opens the "big copyright era" with value

With the development of the Internet, the digitalization process of the cultural industry has accelerated, and traditional copyright technology can no longer meet the needs of copyright protection. The industry believes that to cope with the copyright protection challenges brought about by digital development, in addition to national policy guidance, new technologies such as blockchain and big data mustThe use of technology will also play an important role. Recently, Xinhua News Agency China Picture Group stated that it will join hands with the DCI system to build a national imaging copyright service platform that integrates new technologies such as blockchain and digital watermarking.

In fact, in recent years, the country has continuously introduced various policies to support the development of the blockchain industry and encourage the innovative application of blockchain technology.

In 2016, the State Council issued the "Thirteenth Five-Year Plan for National Informatization", which for the first time included blockchain into the category of new technologies and made a cutting-edge layout.

On March 13, 2021, the "Fourteenth Five-Year Plan for National Economic and Social Development of the People's Republic of China and the Outline of Long-term Goals for 2035" was announced, and blockchain was listed as one of the seven digital economies. One of the key industries.

On July 16, 2021, the People's Bank of China released the white paper "Research and Development Progress of China's Digital RMB". Data shows that as of June 30, 2021, there have been more than 1.32 million digital RMB pilot scenarios, covering Living payment, catering services, transportation, shopping consumption, government services and other fields.

Recently, there is constant news about the positive development of the copyright industry and the innovation and development of blockchain technology. First, the China Copyright Protection Center will cooperate with Huawei to build my country's independently innovative DCI (Digital Copyright Identifier, Digital Copyright Unique Identifier) ​​system and create a new ecosystem for the Internet copyright industry based on blockchain technology; second, Xinhua News Agency China Picture Group said , will join hands with the DCI system to jointly explore innovative research in the field of image content copyright in the 5G era, build a national image copyright service platform, and jointly build a new ecosystem for Internet visual copyright transactions.

The "Blockchain Digital Copyright Asset Transaction" channel jointly built and promoted by Alibaba Auction and Xinbian Chain was also launched nationwide recently and started previewing. The Alibaba auction platform is an innovative application of blockchain technology in the digital copyright industry. According to reports, the "Blockchain Digital Copyright Asset Transaction" project provides copyright owners engaged in literature, games, animation, music, art, etc. with the verification and on-chain transactions of digital works based on the "New Version Chain". The copyright of the work generates a unique digital copyright asset certificate in the "New Edition Chain". After the transaction, the legal holder of the copyright asset certificate will have all rights except the signature right of the digital work.

It is worth noting that the national image copyright service platform created this time will use new technologies such as blockchain, image invisible digital watermarks, network-wide image copyright detection, big data, and artificial intelligence. The industry believes that digital watermark technology can currently be used in eight scenarios, including radio and television content monitoring, media asset retrieval, film and television drama review and leakage prevention, advertising monitoring and statistics, movie projectors, Internet copyright protection, military information confidentiality, and IP product anti-counterfeiting. , cumulative market sizeMore than 2 billion yuan. The absolute advantages of technology and resources are obvious, and the revenue scale of digital watermarking business is expected to expand significantly in the future.

Blockchain naturally solves the ownership confirmation problem in the information storage process based on mathematical principles. The recording, transmission and storage results of copyright information are all effective and credible. Once produced, the information recorded in the blockchain will be permanently recorded and cannot be tampered with. Only by possessing more than 51% of the computing power of the entire network can it be possible to modify the relevant copyright information.

In traditional intellectual property rights protection activities, a series of phenomena such as low execution efficiency of third-party agencies, difficulty in obtaining evidence, high costs, low compensation, and long cycle are common. In the information exchange and interconnection in the blockchain global network, efficiency can be greatly improved without the need for third-party processing. Generally speaking, blockchain solves the problem of being unable to tamper with registration time and content, while digital watermark technology solves the problem of providing evidence.

Relevant personnel of Hanbang Hi-Tech once compared: "I discovered that someone pirated my content and included my watermark. This can provide evidence to prove the problem of piracy and copyright confirmation." Analysis by industry insiders It is pointed out that if watermarks are put on the chain and blockchain + digital watermarks are combined, the core pain points of cumbersome confirmation of rights in the original copyright protection technology can be perfectly solved, and it has high technical value.

Blockchain is closely related to our future. It is an imaginative concept. Many people think that blockchain is only related to digital currency, but actual exposure to blockchain may occur more in: health codes, online ride-hailing, stock trading... In fact, blockchain and its technology Derivative applications can be said to be the hottest emerging industry at the moment.

Blockchain cannot represent the future, but its future has great possibilities. Regarding the application scenarios of blockchain technology in copyright protection, what still needs to be done is to conduct in-depth research on the core technology of blockchain and understand the application nature of blockchain-enabled industries. The application of technology will be in place, the process will be standardized, the information security on the chain will be solved with focus, and it will be truly and effectively implemented in the physical field, so that the future industrial blockchain will usher in a new era of rapid development.

5. What are the specific applications of blockchain technology in the medical industry

The medical and health industry is one of the earliest industries to apply blockchain technology. Blockchain technology has eight major application scenarios in the medical industry: 1. Medical health data; 2. Genomic data; 3. Medical insurance; 4. Medical staff identity authentication; 5. Drug anti-counterfeiting; 6. Medical supply chain finance; 7. Clinical practice Test; 8. Operation records. Currently, the most widely used fields are medical health data and medical insurance.
Currently, domestic Internet giant Tencent has entered the field of blockchain medical and health data. On April 13, Tencent officially released WeChat Smart Hospital 3.0. The new version of WeChat Smart Hospital incorporates all medical information into the blockchain, monitors it in real time on the chain, and makes the entire process traceable.

6.What are the applications of blockchain technology?

Blockchain has become popular, so what are the application fields of blockchain?

At present, the most extensive and successful application of blockchain technology is the digital currency represented by Bitcoin. Digital currency has developed rapidly in recent years. Due to the characteristics of decentralized credit and frequent transactions, it has a high transaction value and can maintain a relatively stable price through the development of hedging financial derivatives as a quasi-super-sovereign currency.

Financial institutions are the most willing to explore blockchain applications and need new technologies to improve operational efficiency and reduce costs to cope with the current status of the entire global economy. Objectively speaking, the market space in the financial industry is huge, and a little progress can bring huge benefits. The financial industry is an industry with extremely high requirements for security and stability. If the application of blockchain in the financial field is verified, it will have a huge demonstration effect and be quickly promoted in other industries. In the financial field, in addition to digital currency applications, blockchain has gradually begun to be applied in cross-border payments, supply chain finance, insurance, digital bills, asset securitization, bank credit reporting and other fields.

As the application of blockchain technology in the financial field continues to be verified, its technical advantages are gradually showing value in other industries. At present, blockchain application projects are gradually being implemented in fields such as medical and health, IP copyright, education, culture and entertainment, communications, charity, social management, sharing economy, and the Internet of Things, and "blockchain" is becoming a reality.

(1) Blockchain medical care: In the medical field, blockchain can use its anonymity, decentralization and other characteristics to protect patient privacy. Electronic health (EHR), DNA wallet, drug anti-counterfeiting, etc. are all possible application areas of blockchain technology. IBM predicted in last year's report that 56% of medical institutions around the world will invest in blockchain technology by 2020.

(2) Blockchain Internet of Things: The Internet of Things is a very broad concept. If communications, energy management, supply chain management, sharing economy, etc. are included, the Internet of Things with blockchain technology Application will become a very important application field.

(3) Blockchain IP copyright & cultural entertainment: Since the Internet became popular, digital music, digital books, digital videos, digital games, etc. have gradually become mainstream. The rise of the knowledge economy has made intellectual property rights a core element of market competition. However, intellectual property infringement is serious in the current Internet ecosystem, and the copyright protection of digital assets has become a pain point in the industry. Blockchain features disintermediation, consensus mechanism, and non-tampering. Blockchain technology can effectively integrate all aspects of the cultural and entertainment value chain, accelerate circulation, and shorten the value creation cycle; at the same time, it can realize the value of digital content Transfer, and ensure that the transfer process is credible, auditable and transparent, effectively preventing piracy and other behaviors. Blockchain Public Services & Education: In the fields of public services, education, charity and public welfare, issues such as file management, identity (qualification) certification, and public trust all exist objectively., the traditional method is to rely on a credible third party for credit endorsement, but problems such as fraud and deficiencies still exist.