From "one yard pass" to "digital twin", the last link of the blockchain

At present, in order to balance epidemic situation prevention and resumption of production, the General Office of the State Council, in conjunction with relevant parties, has upgraded the national integrated government service platform "epidemic prevention health information code", established a cross-province mutual recognition mechanism for "health code" information, and achieved one yard across the country. Traffic.

The "health code" is uploaded by citizens by themselves, identification of travel arrangements and health status. After verification by the residence authority, information is shared across the country and used as a traffic checkpoint, residential quarter, enterprise park, and public management and service agency Of passes.

"Health code" is the test of smart city citizenship system

The core of the "health code" is CTID (Cyber ​​Trusted Identity), which is a digital identity credential. It turns the physical identity document into a two-dimensional code of a mobile phone terminal and dynamically displays the user's health information (red code, green code, yellow code). While realizing the digitization of personal information, it also enables these data to cross fields. , Cross-level, cross-sectoral mobility. The "health code" is an application of digital identity, not the whole connotation. Where does the "health code" go after the epidemic? Deprecation is undoubtedly a waste, and upgrading will open up more possibilities, and the government has realized this.

Recently, Hangzhou has opened up the "Citizen Card + Health Code" system, and is the first in the country to launch the "Card Code Integration, Swipe to Read Code" model. At the same time, Hangzhou is constantly upgrading the health code function, and strive to build the health code into a citizen code. This means that the "health code" model will be extended to a wider range of public utilities and run normally. This is a new attempt for smart city citizenship systems and data-driven governance, and a good opportunity for all-round popularization and practice by governments and citizens. .

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If all provinces and cities are like Hangzhou, upgrade the "health code" to "citizen card", then the services it covers will expand from smart medical care to smart transportation, smart grid, smart water affairs, smart pipe network, smart buildings, Realize intelligent management and control of urban order, emergency treatment, and green energy saving, and realize the expectations in the "National New Urbanization Plan (2014 ~ 2020)".

Digital twins are a prerequisite for building a smart city

In 2008, IBM proposed the concept of a smart earth, and governments of various countries have begun to explore smart city governance models. Building a smart city is to map a physical city into a digital twin city, forming a fusion mechanism of virtual and real mapping and real-time interaction. Digital twins are a prerequisite for building a smart city.

"The Big Data Administration or the corresponding functional department, based on the credible identity authentication of the public security department, guides the combination of supply and demand to develop smart city-related applications and scenarios, such as public travel, hotel accommodation, financial services, social governance, And the data generated by various applications are deposited in urban big data centers to gradually accumulate and form the prototype of digital twin citizens. "Hu Yi, Big Data Management Bureau of Wuxi, said in an article in the Xinhua Daily recently.

The data sharing under this epidemic is in line with the health and safety of everyone's life under limited conditions. However, if this model is normalized, it will be necessary to consider the privacy and authenticity of data under cross-subject, cross-distance collaboration, and this is where blockchain is used.

"Out of Control" author Kevin Kelly said: The future world is a virtual plus real world, and we hope to map the entire real world 1: 1 into a digital society. In the mirror world of "digital twins," we can interact with tools. In order to ensure the credibility and authenticity of the uploaded data, we hope that the data is decentralized, so blockchain technology is needed.

Blockchain is the infrastructure for building digital twins

Among the top ten strategic technology trends released by GARTNER in 2019, digital twins and blockchain are both on the list. Gartner predicts that by 2020, there will be more than 20 billion connected sensors and endpoints, and digital twins will serve billions of objects. At the beginning, various corporate organizations simply implemented digital twins, but they will evolve over time, improve their ability to collect and visualize the correct data, apply the correct analysis and rules, and effectively respond to the business goals of the enterprise.

The blockchain is essentially a technical solution to collectively maintain a reliable database in a decentralized and detrusted manner through computer technology such as distributed data storage, point-to-point transmission, consensus mechanisms, and encryption algorithms, which can enhance known entities Sharing of information between them, while increasing the possibility of tracking and tracing physical and digital assets. The combination of blockchain and digital twins can play a role in multiple scenarios such as smart logistics, smart appliances, and smart medical.

For example, in smart home appliances, TVs, refrigerators, water heaters, air conditioners, microwave ovens, and other devices are connected together. At this time, a central management system is needed to control the digital twins of the smart devices. On the one hand, the digital identity of the owner of the smart home appliance needs to be confirmed, otherwise anyone can control your home at will. On the other hand, your digital identity should be controlled by yourself and encrypted and authorized externally, which all require blockchain technology.

For example, in smart logistics, item information is uploaded and tracked through IOT sensors, and digital twins are created on the blockchain platform to ensure the authenticity and integrity of the data. The digital twin model allows companies to run simulations through historical data to quickly adjust and continuously upgrade the logistics system operation in various scenarios, which can be applied in the stress test of the "Double Eleven" e-commerce logistics system.

To sum up, the construction of smart cities is an inevitable trend. "One yard of traffic" is a test of digital twins in the citizenship system. Digital twins will be used in more scenarios in the future, and the premise of free data circulation is security. And privacy, the blockchain will escort it and open up the last link.

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