区块链与追溯区别是什么,区块链与追溯区别在哪

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Is blockchain technology meaningful for product traceability?

Of course it is. A major feature of blockchain is decentralization, information traceability and non-tampering. Nowadays, commodity traceability has always been a hot area where giants are competing for the implementation of blockchain technology. As early as 2017, Tmall International launched a global traceability plan, using blockchain technology to track information on imported commodities.
The traceability of blockchain technology is used to increase the traceability and safety of goods through in-depth integration of logistics management, commodity anti-counterfeiting, commodity traceability, manufacturing management, industry collaboration and other fields. Crypto Finance, focusing on blockchain information.

㈡ What exactly is the blockchain?

What exactly is the blockchain? In essence, blockchain is a distributed, decentralized network database system that will make the storage, update, maintenance, and operation of data different. Blockchain has four indispensable core technologies, namely: distributed storage, consensus mechanism, cryptography principles, and smart contracts.

Then let’s talk about how blockchain is different from traditional data processing to help everyone understand what blockchain is and give everyone a general understanding of blockchain. Cognition.

1. Data storage in blockchain: block chain data structure

In terms of data storage, blockchain technology utilizes "block chain data structure" To verify and store data.

What does the blockchain structure mean? Everyone has seen an iron chain, with one link within another. In fact, each link can be regarded as a block, and many links are linked together to form a blockchain.

How does this so-called "iron chain" store data? To put it simply, the difference between blockchain and ordinary stored data is that on blockchain, the data in the next block includes the data in the previous block.

Take reading as an example: when we read a book, we read page 1, then page 2, page 3...
What about in the blockchain? If each block is marked with a page number, then the content on page 2 contains the content on page 1, the content on page 3 contains the content on page 1 and page 2...Page 10 contains The content of the first 9 pages is such a chain nested layer by layer. In this way, the most original data can be traced back. This is the traceability of the blockchain.

The "blockchain data structure" of blockchain makes it traceable, which is naturally suitable for many fields, such as: food traceability, drug traceability, etc. In this way, the probability of tainted milk powder, fake vaccines, and fake and substandard food incidents will be greatly reduced, because once a problem occurs, through traceability, we can clearly know which link caused the problem, and accountability and recovery will be more clear.Clear.

2. Data update in the blockchain: distributed node consensus algorithm

In terms of data update, blockchain technology uses the "distributed node consensus algorithm" to Generate and update data.

Every time a new block is generated (that is, when data is updated), an algorithm needs to be used to obtain the approval of more than 51% of the nodes in the entire network to form a new block. To put it bluntly, it is a vote, and it can be generated if more than half of the people agree, which makes the data on the blockchain non-tamperable.

Why do you say that? Let’s make an analogy: we compare the blockchain to a ledger, because it records data. In the traditional world, the bookkeeping power lies with the bookkeeper, and the ledger belongs to the bookkeeper alone. So in the blockchain, everyone owns this account book. If you want to update the account, you must vote. Only if more than half of the people agree can you update the account data.

In this process, we will involve several terms: distributed, node, consensus algorithm. These terms are actually very easy to understand:

Everyone Accounting (that is, everyone has a ledger, and the ledger is scattered in everyone's hands) is the so-called "distributed";

The accounting method that everyone discusses, votes for, and unanimously agrees on is The so-called "consensus algorithm";

Every person participating in accounting is a so-called "node".

3. Data maintenance in blockchain: cryptography

In the data maintenance stage, the difference of blockchain is that it uses cryptography to Ensure the security of data transmission and access.

The cryptographic principles applied in the blockchain mainly include: hash algorithm, Merkle hash tree, elliptic curve algorithm, and Base58. These principles actually ensure data security on the blockchain through a series of complex operations and conversions.

4. Data operations in the blockchain: smart contracts

A smart contract is a commitment agreement defined and automatically executed by a computer program. To put it bluntly, it is executed with code A set of transaction rules, similar to the current automatic repayment function of credit cards. If you turn this function on, you don't have to worry about anything. The bank will automatically deduct the money you owe when it expires.

The outstanding advantage of smart contracts is that they largely avoid a series of problems caused by trust.
Many of us have encountered the situation of being borrowed money: a friend who is short of money borrows 2,000 yuan from you and promises to pay back the money after the salary is paid next month, but next month he finds other excuses. Also, dragging this matter around would be pointless. We didn't have much money, but we were still friends. Even though you were depressed, let it go.

Then, after having a smart contract, he cannot default on his debt, because in the smart contract, once the terms in the contract are triggered, the code will automatically execute, whether he wants it or not, as long as he sends Once you have earned your salary and have money in your account, he has to pay you back.

To summarize the contents of this section, there are four indispensable core technologies in the blockchain, namely: distributed storage, consensus mechanism, cryptography principles, and smart contracts.

We can understand it this way: distributed storage corresponds to the data storage stage, the consensus mechanism corresponds to the data processing and update stage, cryptography corresponds to data security, and smart contracts correspond to data operational issues.

㈢What is blockchain traceability technology

From farm to table, blockchain traceability technology is equivalent to purchasing a liability insurance for the product

Bathing crabs, clenbuterol, In recent years, there have been reports on the market of food added with white lumps (sodium formaldehyde sulfoxylate), poultry feeding hormones, whitening agents added to flour, seafood soaked in formaldehyde, etc. In addition, fruits are sprayed with ripening agents and enlarging agents. Spraying highly toxic pesticides on green vegetables has made people change their color after hearing it. Food safety and health are becoming more and more important to us, so this is when blockchain traceability technology emerged - a technology that allows agricultural products to be traced from planting to Fully traceable technology for sale.

Before figuring out the blockchain traceability technology, we must first understand the difference between "traceability" and "traceability".

"Traceability" includes two meanings: logistics tracking and traceability. People often think of traceability and traceability as the same thing. In fact, what companies care about is tracking (don’t lose the goods), while consumers care about traceability (whether what I bought is safe).
The biggest feature of Sanqing Fertile Farm is its traceability, which is a powerful means to ensure food safety. It starts from the source of planting and controls the source, production and processing, cleaning and disinfection, sub-packaging, packaging, storage, transportation, sales and other links.

In short, to be precise, food traceability is a cost and an essential early investment, which is equivalent to purchasing a "liability insurance" for your product. Maybe you won't see the effect for a year or two, but when you really use it, it may be a life-saving straw.

㈣ What is blockchain anti-counterfeiting traceability technology?

Anti-counterfeiting traceability can actually solve the problem very well through traditional QR code technology. The pain point is that the anti-counterfeiting data is stored in Due to its centralized structure, it is easy to tamper with and has weak credibility. It happens that the characteristics of blockchain are very consistent with anti-counterfeiting and traceability. Let me first review the four major characteristics of blockchain applications.
Four major characteristics of blockchain applications:
1. Decentralization: Blockchain consists of many nodes forming an end-to-end network, and there is no centralized equipment and management organization.
2. Non-tampering: Modifications to the database by a single or even multiple nodes cannot affect the databases of other nodes unless more than 51% of the nodes in the entire network can be controlled.It is almost impossible to modify at any time
3. Transaction transparency: The operating rules of the blockchain are open and transparent, all data information is also public, and every transaction is visible to all nodes
4 . Traceability: Every transaction in the blockchain is connected in series with two adjacent blocks through cryptographic methods, so the ins and outs of any transaction can be traced back.

㈤ What is the difference between blockchain product traceability and product anti-counterfeiting

The two have different meanings
Product anti-counterfeiting is to identify the authenticity of goods and prevent counterfeiting. Product traceability uses blockchain technology to check the source information of goods. Crypto Finance focuses on blockchain information.

㈥ What is the significance of blockchain technology for anti-counterfeiting and traceability

Blockchain technology is a distributed storage technology, which means that after an event occurs, many people This matter is recorded, and at the same time, the content recorded by these people is cryptographically verified to ensure consistency, which forms a fact that cannot be tampered with. As for anti-counterfeiting traceability, if it is a file type, it can indeed be achieved. But for physical items, other technologies need to be used in conjunction with blockchain to truly achieve anti-counterfeiting and traceability.

㈦ What is blockchain and what is agricultural traceability?

Answer: 1. The connotation of blockchain

Blockchain is a distributed shared ledger and database, which have the characteristics of decentralization, non-tampering, full traceability, traceability, collective maintenance, openness and transparency.

2. The connotation of agricultural traceability

1. Agricultural traceability is the most complex and difficult part of food traceability. Currently, except internationally, there is no traceability based on food safety production and the entire supply chain. A fully integrated agricultural product traceability system that manages both aspects.

2. The most important thing in the construction of agricultural traceability system is "one center and three modules", which is a traceability cloud data center and three modules of producers, regulatory authorities and consumers.

3. Composition of blockchain

The blockchain system consists of data layer, network layer, consensus layer, incentive layer, contract layer and application layer.

㈧ The significance of blockchain technology in anti-counterfeiting traceability

——Yinlian’s answer:

Blockchain can achieve The traceability and non-tamperability of data are due to the fact that it is based on a distributed database established by cryptographic links, thus forming a data source that cannot be tampered with. Therefore, complete information recording can be achieved in the entire process of products from production to circulation, providing comprehensive product data information to regulatory authorities, allowing them to complete product quality inspection and data interconnection and mutual sharing more efficiently. In this process, blockchain can solve Four questions:

First, information cannot be tampered with, consensus is reached and trust is established. In the network nodes composed of various participants, the business process forms data records. In the product logistics, warehousing, and production links, including raw material sources, processing, assembly, etc.Information is stored in the blockchain network, providing regulatory authorities, cooperative enterprises or institutions with data information in all aspects.

Second, the process is open and transparent. To achieve product anti-counterfeiting and circulation in the business process, identification chips can be implanted into the product and registered on the blockchain so that it has a digital identity, and then all the information of this digital identity can be recorded through a jointly maintained ledger. Such as source, circulation, etc., to achieve verification effect.

Third, save costs and improve efficiency. The data recorded on the blockchain are kept confidential, and the regulatory authorities store, transmit, verify, and analyze product information, and transfer it between different departments to achieve unified vouchers, full-process records, and corporate credit reporting, which can effectively solve the problem. Issues such as multi-party participation, information fragmentation, and repeated review of circulation links.

Fourth, information sharing. The circulation of enterprise product certification relies on the interconnection of public data resources among departments and institutions such as commerce, customs, quality inspection, industry and commerce, and banks. Under the review environment established by the blockchain, all departments obtain information simultaneously and establish a supply chain-based The credit evaluation mechanism is organically connected with various supply chain platforms to disclose and share information such as credit ratings, credit records, risk warnings, illegal and dishonest behaviors, etc.

The disadvantages of traditional anti-counterfeiting traceability have become very obvious. Anti-counterfeiting traceability has always been an important scenario in blockchain applications. Typical Ruyin Chain also starts from the anti-counterfeiting traceability scenario, hoping to create a blockchain suitable for commercial use. .

Compared with the traditional centralized anti-counterfeiting traceability technology, Yinlian uses the underlying technology of the blockchain, and the merchants produce the anti-counterfeiting codes themselves, eliminating the trust problem of cheating by the middle anti-counterfeiting dealers. The main process is as follows:

㈨ What is the difference between blockchain and supply chain?

Blockchain is a decentralized data processing that supplies Chain is the internal and external supply relationship that an enterprise maintains to maintain normal operation. The application of blockchain in supply chain will bring about subversive changes.

Blockchain is a term in the field of information technology. In essence, it is a shared database, and the data or information stored in it has the characteristics of "unforgeable", "full traces left", "traceable", "open and transparent" and "collectively maintained". Based on these characteristics, blockchain technology has laid a solid foundation of "trust" and created a reliable "cooperation" mechanism, which has broad application prospects.

The supply chain refers to the network chain structure formed by upstream and downstream enterprises involved in the provision of products or services to end users in the production and circulation process.

Management methods

Common Supply chain management methods include Quick Response (QR) and Effective Customer Response (ECR).

Quick Response (QR) means that logistics companies face a buyer's market with multiple varieties and small batches. They do not reserve "products" but accuratelyIt has prepared various "elements", and when users make requests, they can extract the "elements" as quickly as possible, "assemble" them in time, and provide the required services or products. QR is a supply chain management method developed in the U.S. textile and apparel industry.

Reference for the above content: Network-Regional Chain, Network-Supply Chain