Recently, blockchain has been mentioned frequently. In the 18th collective study on the current situation and trend of blockchain Technology Development held on October 24, 2019, it was emphasized that “blockchain should be taken as an important breakthrough for independent innovation of core technology” and “the innovation and development of blockchain technology and industry should be accelerated”. The popularity of blockchain has always been high. For a period of time, all kinds of digital currencies occupied our minds, and blockchain was just a kind of thing attached to it. But now, with the “decline” of domestic digital currency, blockchain has re entered the public field of vision. The concept of blockchain was first proposed by Nakamoto, the inventor of bitcoin. At first, blockchain was only designed for bitcoin, a digital currency. However, the technology community has found other potential uses of the technology, and has received extensive attention from the society.
Such a hot noun may be separated into three words, each of which can be understood, but when combined, it will be encircled. If you think of such a popular thing, you must be very curious about what it is and what advantages it has to win the favor of various industries. I hope that after reading this article, you can have a deeper understanding of blockchain.
What is blockchain
Blockchain, in essence, is an open distributed database, which is used to store computer files of information (data). The name of blockchain comes from its structural characteristics: the file is composed of data blocks, and each block is linked to the previous block to form a chain; each block contains data, such as transaction records and records when the block was edited or created, and the information (data) has a time stamp, which is the origin of blockchain.
Blockchain technology has also been widely usedIt is called distributed ledger technology, which is a kind of Internet database technology. It is characterized by decentralization, openness and transparency,Let everyone participate in database records. At the same time, it is different from the general centralized database. The blockchain is not controlled by any person or entity, and the data can be completely copied and distributed on each node in the network. Therefore, in the blockchain, “everyone is equal.”.
The above explanation is more official, and may be “confused” after reading it. Next, through the story of “Er Gouzi goes to the hospital when he is sick”, you can enter the world of blockchain and really understand the strength of blockchain.
Familiar with the public buddy of the official account of the small partners know that two dogs are a senior network engineer. Senior, also through the efforts of the exchange. Er Gouzi always thought he was young and often stayed up late to work overtime to contribute to the company. As a result, he found that he was often weak and sweating. So Er Gouzi took a day off and went to the community health center to see a doctor.
When I got to the health center, I first described my illness with the doctor like pouring bitter water. My saliva was flying everywhere. Only in exchange for the doctor’s light words, “go and have a check first.”. Er Gouzi had no choice but to get up for an examination. But after a lot of examinations, the doctor looked at the report and said, “we can’t cure this disease. Why don’t we go to a bigger hospital?”. Er Gouzi panicked when he heard about it. It’s so serious. I’m still so young. I still have many dreams. I can’t help it. So he made an appointment with the third grade a hospital in the city and ran to the hospital. He thought there was a cure this time and he could be cured immediately. As a result, the doctor said coldly, “come on, have a check first.”. Two dog son was hoodwinked, “I just did, how to do again?”
I believe we often encounter such a situation, the same examination, to different hospitals have to repeat, a waste of time, not to mention, is a waste of money! It’s hard for many people to understand In fact, we can regard every hospital as a database. When a patient comes to see a doctor, the doctor will upload the patient’s information to the database of his own hospital. But each hospital’s database is independent, each in charge of its own, and not connected with each other. Therefore, although the examination was done in the last hospital, the patient’s information disappeared after the change of hospital, so we need to start from scratch. That’s what happened to the two dogs above.
So, if the patient information of each hospital can be seen in all hospitals, will it save money and be efficient in the future? In other words, each hospital uploads the patient information to a place, and then all the hospital information is packaged and connected together. At the same time, each hospital will generate a copy of the data of all hospitals. In this way, a hospital can see the patient information uploaded by all hospitals. Er Gouzi goes to another hospital to see a doctor. The doctor only needs to call out the information of the previous hospital examination, so there is no need to repeat the examination.
These packaged information are blocks. So, what is the name of stringing these blocks into a chain? Blockchain is the answer.
Advantages of blockchain Technology
Through examples, we have a basic understanding of the concept and principle of blockchain. So what advantages does it have that people from all walks of life should respect it? In addition to distributed node information sharing, blockchain technology has the following advantages:
In the traditional security scheme of information system, security depends on the layer by layer access control. For example, there are dedicated computer rooms, proprietary networks, and all-round security software. Under such strict protection, the interfaces are dedicated access channels. Anyone must pass the identity authentication, authentication, in order to enter the database, read or write data, and leave history records.
However, no matter how strict the protection measures are, there will be “loopholes”. The so-called “one hundred secrets and one sparse”. Hackers are good at attacking information and data through these “loopholes”. But what if blockchain technology is used? Even if one node is attacked, it is not afraid, because all the data is still stored on other nodes. Take the example of the above hospitals. In the past, each hospital only kept the information of its own patients. If one of the hospitals was attacked, the information of this hospital would be lost. With blockchain, patient information is not only unique to a hospital. Even if a hospital is attacked, patient information will not be lost. At this time, each hospital is not its own center, and all data are the same, which is also called decentralization.
2. Tamper proof
In the blockchain, once the information is verified and added to the block, it will be stored permanently and cannot be modified. This is also due to its ingenious design, supplemented by cryptography and consensus algorithm, so that the historical records of the database can not be tampered with. The one-way hash algorithm is adopted in the blockchain, and the irreversibility of time makes it easy to trace any attempt to invade and tamper with the data information in the blockchain, so it also improves the corresponding security.
As we said earlier, each hospital uploads its own information to form such a blockchain. And every family keeps a copy of this information. Therefore, when someone wants to maliciously tamper with information, all hospitals will refuse this behavior, because it is inconsistent with the retained information, that is, distributed ledger.
At this point, you may have a question. Since the information of each node is fully shared and open, can’t everyone see the information? Isn’t all the data leaked? Don’t worry at all. Because the data in the blockchain is encrypted, it seems that it is just garbled. Data can only be displayed through authorization.
It is precisely because blockchain has the advantages of decentralization, non tampering, tracing, collective maintenance, openness and transparency that the information it carries will be true and effective, and this technology will be recognized by various countries.
Application fields of blockchain Technology
Reading here, I believe you will also find that blockchain is so powerful that it is worthy of being an innovative technology emphasized by the state. From the technical level, blockchain involves many technical problems such as mathematics, cryptography, Internet and computer programming; but from the perspective of application, we can go beyond specific technical problems and think about complex phenomena with basic principles. The huge application scenarios of blockchain are basically based on the fact that blockchain can solve the problem of information asymmetry and realize the cooperation, trust and unity among multiple agents.
1. Data authenticity
The “tamper proof” feature of blockchain provides a solution to the “certificate keeping” problem in social development. As long as the authenticity of the uploaded information and data can be ensured, the blockchain can solve the problem of “storage” and “certification” of information. In financial, judicial, medical, copyright and other fields with high requirements for data authenticity, blockchain can create safe and efficient application scenarios. At the same time, because the blockchain records all the transaction information, the blockchain itself can form a credit reference, which provides a new idea for the realization of social credit reference.
2. Information sharing
The “distributed” feature of blockchain can break through the “data barrier” between departments and realize information and data sharing. In the field of public services, blockchain can realize the joint maintenance and utilization of government data across departments and regions, and bring better government service experience for the people. At present, Hangzhou has begun to implement the “only run once” business features. It can be predicted that with the implementation of “blockchain + government affairs”, cross department business cooperation will become the norm, and there will be no need to ask for leave to go everywhere in the future.
3. Mutual trust
The formation of “consensus mechanism” in blockchain can solve the problem of information asymmetry and truly realize the transformation from “information internet” to “trust Internet”. Trust is not only the cornerstone of market economy, but also a scarce product. Many problems in economic development are difficult to solve, largely due to the lack of trust, high transaction cost and high default risk. Blockchain can enhance the information credibility of the upstream and downstream of the supply chain, and solve the “trust crisis” in the society through the open and transparent information on the chain.
Now, the application of blockchain technology has extended to digital finance, Internet of things, intelligent manufacturing, supply chain management, digital asset trading and other fields. At present, major countries in the world are accelerating the development of blockchain technology. China has a good foundation in the field of blockchain. It is necessary to accelerate the innovation and development of blockchain technology and industry, and actively promote the integration of blockchain and economic and social development.
Of course, the future of blockchain has come, but we should also be rational. Blockchain technology is accompanied by cryptocurrency, but blockchain technology innovation is not equal to hyping virtual currency. At the same time, blockchain is still in the early stage of development, and needs to be further developed and improved in terms of safety, standards, supervision, etc. To avoid rushing into mass action and repeated construction, we should be able to open up the imagination of blockchain in orderly competition. China has a good foundation in the field of blockchain, a relatively sufficient talent pool and rich application scenarios, so it is fully qualified to take the lead in this new track.
We will wait and see what the future will be like!
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