区块链的信息共享是什么,区块链的信息共享包括

区块链的信息共享是一种分布式的数据存储技术，它可以让所有参与共享的用户共享信息，而不必担心安全性和可信度。本文将介绍区块链的信息共享的三个关键词：去中心化、不可篡改和共识机制。

去中心化是区块链的核心特性，它可以保证信息的可靠性和安全性。去中心化的区块链系统不依赖于任何中心机构，而是由网络中的每个节点共同维护，任何一个节点都可以查看整个网络的信息，而不受任何中心机构的限制。这样可以有效地防止任何一方恶意篡改网络中的信息，并且信息的安全性得到有效的保障。

不可篡改是区块链的另一个重要特性，它可以保证区块链系统中的信息不会被篡改。区块链采用分布式存储技术，每个网络节点都可以查看网络中的信息，这样可以有效地防止任何一方恶意篡改网络中的信息，使得信息的安全性得到有效的保障。此外，区块链系统中的每一条记录都是不可篡改的，这样可以有效地防止数据被篡改，保证信息的真实性和可信度。

共识机制是区块链系统中的一种机制，它可以确保区块链系统中的信息能够得到有效的安全性保障。共识机制是一种分布式的安全机制，它可以保证网络中的每个节点都能够参与到信息的共享中来。这样可以有效地防止任何一方恶意篡改网络中的信息，使得信息的安全性得到有效的保障。此外，共识机制还可以保证网络中的节点可以达成一致，从而保证网络中的信息能够得到有效的安全保障。

以上就是区块链的信息共享的三个关键词：去中心化、不可篡改和共识机制的介绍。通过这三个关键词，我们可以了解到区块链的信息共享是一种可以有效保障信息安全性的技术，确保信息的真实性和可信度。

① What is the main value of supply chain blockchain?

The main value of supply chain blockchain lies in the following aspects:

Improving supply Chain transparency: Blockchain technology can realize the sharing and recording of supply chain information, thereby improving the transparency and visibility of the supply chain. By sharing and recording supply chain information, potential risks can be better identified and managed, and overall supply chain efficiency improved.

Strengthen supply chain security: Blockchain technology can ensure that data is not tampered with or forged, thereby strengthening supply chain security. For example, during the procurement and transportation of raw materials, blockchain technology can be used to better track the flow of goods and prevent counterfeit and shoddy products or malicious attacks.

Optimize supply chain costs: Blockchain technology can simplify complex transaction links in the supply chain, thereby reducing supply chain costs. For example, in trade finance, using blockchain can simplify transaction processes and reduce labor and time costs.

Improve supply chain efficiency: Blockchain technology can speed up the transmission and processing of supply chain information and optimize supply chain efficiency. For example, in the logistics process, the use of block chain can realize automated processing and tracking, improving logistics efficiency and accuracy.

Promote supply chain cooperation: Blockchain technology can establish a decentralized data sharing platform, allowing different nodes in the supply chain to better collaborate and trust each other. Blockchain technology can change traditional competitive relationships and establish a more cooperative and fair supply chain ecosystem.

To sum up, the main value of supply chain blockchain lies in its advantages in improving supply chain transparency, strengthening supply chain security, optimizing supply chain costs, improving supply chain efficiency, and promoting supply chain cooperation. , thereby realizing the digital transformation and upgrading of the supply chain.

② What changes can blockchain bring to data sharing

What changes can blockchain bring to data sharing
Currently, text and text are shared on social networking sites Taking photos and sharing each other's joys, sorrows and joys has become an important part of public life.
With the progress of the times, sharing is gradually entering the real society. A series of shared economic models such as shared bicycles, shared umbrellas, shared power banks, and shared cars have emerged, bringing great convenience to human life. .
As a distributed shared ledger, blockchain technology seems to be inherently inseparable from sharing, and industry insiders continue to claim that this technology can bring revolutionary progress to sharing.
So, what is the difference between blockchain-based sharing and Internet-based sharing? This article takes data sharing as an example to answer this question.

Blockchain shares more than just data
Data sharing is an innate need of human beings. For example, talking about life ideals in a cafe, writing text, etc., these are all An important way for ordinary people to communicate information with others.
The emergence of the Internet has broken the geographical boundaries of data sharing.and time constraints, it allows different people to communicate instantly in different locations on the earth. The emergence of technologies such as email and online instant messaging has greatly improved the efficiency of information transmission.
In addition, the Internet can collect massive amounts of data, providing a larger capacity than paper archives, allowing users to obtain rich information in a short period of time.
So, how is all this different under blockchain technology?
In fact, blockchain technology is not concerned with the sharing of data, but the sharing of data control permissions. The permissions here mainly refer to the power to modify and increase data. It mainly contains two meanings:< br />One is who can modify the data
The other is how to modify it.
In the Internet model, data reading, writing, editing and deletion are generally accompanied by identity authentication operations. Only specific people can modify the data. In the blockchain model, especially the public chain system Under this system, anyone can participate in reading and writing data, and a trustless system is built in the form of a distributed ledger. The various organizations or individuals participating in reading and writing can not trust each other, but can store the final status of the data in the system. Reach a consensus.
To put it simply, the essential difference between blockchain-based sharing and Internet-based sharing is that blockchain shares not just data, but the control of data. So, how exactly does blockchain handle data control?
Blockchain controls data through rules
Before the emergence of blockchain technology, Internet data was usually controlled by a single entity. Since the website operator has complete control over the central server, these organizations can edit and process the data at will. Although organizations also need to complete data modification and other behaviors under certain laws and agreements, because they are the party that controls the resources, it is difficult for individual users to enjoy complete control.
To give a simple example, a user uploads a photo to the website platform and hopes that friends can see the photo. Excluding some illegal elements, who has the final control over this photo?
Obviously, from the user's point of view, this photo belongs to them, but in fact, these social networking sites are the real controllers. They can modify it at will, but users have nothing to do.
In other words, under the existing Internet system, as long as you have the right to operate the website platform, you can completely control the data on the platform.
Under the blockchain system, data is not controlled by any authoritative party, and its authority is controlled by rules. The main goal of these rules is to stipulate what kind of information is valid, and also stipulates How participants should provide feedback on it.
These rules are usually pre-defined and participants joining the blockchain network must abide by the rules. Of course, technically speaking, participants can ignore certain rules and construct invalid data based on their own interests. However, due to the existence of the blockchain consensus mechanism, other participants canThis invalid data is excluded from the network.
For example, in the blockchain blacklist sharing platform system launched by Suning Financial, there are many such rules - no data can be queried without points, only the organization has the authority to modify the data of this organization, etc. Once an institution performs an operation outside the rules, these operations will be regarded as invalid transactions and are prohibited from occurring.
In general, blockchain regulates data writing behavior based on a technical rule system, while the Internet controls data through power and resources. This is the foundation of blockchain-style sharing and Internet-style sharing. sexual distinction.
Blockchain rules are jointly maintained by participants
Although there are some rules in the Internet environment, because the rules are completely maintained by the power parties, it is difficult to avoid black-box operations and other behaviors. In the blockchain system, the rules are jointly maintained by all participants, and each participant will independently verify the data according to the rules.
In this process, we cannot assume that all participants can fully comply with the rules. Therefore, each participant will independently verify the data it receives and determine whether it violates the rules. If the verification data is valid, then the participant will accept the data and forward it to others, otherwise, it will be rejected directly.
Within the blockchain network, new data can be considered valid data and added to the final blockchain shared ledger only when relevant participants agree.
Depending on how the blockchain is constructed, there are major differences in how data is confirmed. For example, in a public chain, most participants need to agree on the validity of the data, while in a consortium chain or private chain, Only a few participants need to agree.
In this method, the participants themselves are the managers, which is the core expression of blockchain decentralization: no institution is superior to others and has complete control authority over the data.
Blockchain is a form of permission sharing, allowing each participant to serve as a data provider, verifier and user at the same time, jointly maintaining the security and validity of blockchain data.
Since the popularity of blockchain, blockchain for everything seems to have become the advertising slogan of the industry, especially some data sharing applications are considered to be excellent examples of blockchain.
In fact, the emergence of the Internet has solved the problem of data sharing to a certain extent. Blockchain realizes the sharing of permissions. This is the most revolutionary change that blockchain has brought to the industry.

③ In addition to issuing coins, what are the application scenarios of currency-free blockchain?

The actual application scenarios of blockchain now include:

1. The pain points of traditional information sharing

Either a centralized center publishes and distributes information, or regular batch reconciliation between each other (typically once a day), which is time-sensitive Information sharing on sexual requirements is difficult to achieve real-time sharing.

Both parties sharing information lack a mutually trusting communication method, making it difficult toDetermine whether the received information was sent by the other party.

2. Blockchain information sharing

First of all, the blockchain itself needs to maintain the data consistency of each node, and it can be said to have its own information sharing function; secondly, real-time The problem can be realized through the P2P technology of blockchain; finally, using the immutability and consensus mechanism of blockchain, a safe and reliable information sharing channel can be constructed.

Okay. You may have this question: To solve the above problem, I can build an encrypted channel myself without using blockchain technology! But I want to say that since blockchain technology can solve these problems and it is very convenient to add nodes, why not use blockchain technology before you have built a safe and reliable information sharing system?

3. Application cases

Let’s take Tencent’s own application—Public Welfare Human Search Chain and the value of blockchain in information sharing. Bitcoin solves the problem of trust in currency issuance and accounting. Let’s take a look at how Bitcoin solves the above two problems one by one.

The problem of spam issuance: Bitcoins can only be obtained through mining, and the total number of Bitcoins available is 21 million. The problem of currency spam issuance is solved in the issuance process; The issue of ledger modification: Bitcoin Coin transaction records form a network through chain storage and decentralized global node balances to solve the problem of ledger modification.

Chain storage can be simply understood as: the blocks that store records are connected one after another, forming a chain; the records in all blocks except the first block contain the calibration of the previous block. Verification information, changing the information of any block will cause subsequent block verification errors. Because of this correlation, other blocks cannot be inserted in the middle, so it is difficult to modify existing records.

④ What can the blockchain do

Heshu Software analyzes it as follows;
There are so many things you can do by joining the blockchain. Your computer’s computing power, your The bandwidth will become a "bookkeeping book" in the network, helping manufacturers record the data they need, and even electricity will be shared.
Heshu Software will focus on promoting the legal circulation and commercial application of big data using blockchain technology.

⑤ How does blockchain improve security and data sharing

In view of the security features and shortcomings of existing blockchain technology, it is necessary to focus on physics, data, application systems, encryption, and risk. Build a security system in terms of control and other aspects to improve the security performance of the blockchain system as a whole.
1. Physical security
The network and hosts running the blockchain system should be in a protected environment. The protection measures vary according to the regulatory requirements of the specific business. They can be not limited to VPN private networks, firewalls, physical Isolation and other methods are used to protect physical networks and hosts.
2. Data security
Data exchange between nodes in the blockchain should not be transmitted in plain text in principle. For example, asymmetric encryption negotiation keys can be used, and symmetric encryption algorithms can be used to encrypt data. andDecrypt. Data providers should also strictly evaluate the sensitivity and security level of the data, decide whether to send the data to the blockchain, whether to desensitize the data, and adopt strict access control measures.
3. Application system security
The security of the application system needs to start from the aspects of identity authentication, permission system, transaction rules, anti-fraud strategy
and other aspects. The relevant personnel involved in the operation of the application, transaction nodes, Transaction data should be controlled beforehand and auditable afterward. Taking the financial blockchain as an example, a consensus algorithm with stronger fault tolerance, fraud resistance and higher performance can be used to avoid joint fraud by some nodes.
4. Key security
The keys used to encrypt communication data between blockchain nodes and to encrypt data stored on blockchain nodes should not exist in plain text on the same node and should be passed through The encryption machine keeps the private key securely. When a key is lost or leaked, the system can identify relevant records of the original key, such as account control, communication encryption, data storage encryption, etc., and implement response measures to invalidate the original key. Keys should also undergo strict life cycle management and should not be permanently valid and need to be replaced after a certain period of time.
5. Risk control mechanism
There should be careful detection measures for the network layer of the system, host operation, data access of the application system, transaction frequency and other dimensions, and alarms should be issued for any suspicious operations. , record, and verify. If illegal operations are discovered, damage assessment should be conducted, remediation should be carried out at the technical and business levels, security measures should be strengthened, and the source of the illegal operations should be traced to prevent further attacks.

Article source: China Blockchain Technology and Application Development White Paper