怎么查询区块链公司是否正规的,怎么查询区块链公司是否正规公司

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㈠ Where to query the public chain

Query the public chain in the browser.
With the popularity of blockchain, more and more technology companies have begun to research and develop blockchain. While the blockchain is developing rapidly, there are also a small number of project parties using the name of blockchain to deceive the market. How to determine the authenticity of a public chain? For many groups who want to conduct digital currency transactions, it is very important to know how to determine the authenticity of a public chain.

㈡ Are all the blockchains that can be found on the Black Cat website real blockchains?

Not necessarily all the blockchains that can be found on the Black Cat website are real blockchains. There may still be fake ones, and all elements can be found on the world’s authoritative blockchain technology website, commonly known as the Black Cat website.

Where can I check blockchain?

Blockchain? Do you mean blockchain technology, blockchain information, or things related to the blockchain industry?
1) If it is just "blockchain", then you can search directly on the Internet to find a good explanation of "blockchain network".
2) If it is "blockchain technology", the network also has a good explanation. All walks of life are also trying to combine with blockchain technology in new fields. Maybe blockchain technology will be correct in the future. use, rather than being used to fool people.
3) If it is "blockchain information", then you can go to various blockchain media or financial media. There are almost daily relevant blockchain industry information and news reports. Such as: Babbitt, Biyou Finance, Blocknet, Golden, Daily, etc.
4) If it is "blockchain audio", you can listen to it on Ximalaya FM, Lizhi Micro Class, Qianchao and other platforms. Blockchain-related audio from "Biyou Voice", "Yu Lingxiong", "Wang Feng" and other financial media is also good, with various dry information and in-depth analysis.
So, where can you check the blockchain you mentioned? The above 4 points are all related to the blockchain. It depends on your choice.

㈣ How to detect the risk level of blockchain smart contracts

With the acceleration of digital transformation in Shanghai, blockchain technology has been widely used in government affairs, finance, logistics, justice, etc. fields have been deeply applied. During the application process, not only new business forms and business models have been born, but also many security issues have arisen, so security supervision is particularly important. As one of the important means of supervision, security evaluation has become a focus of many blockchain R&D manufacturers and application companies. This article talks about some of our exploration and practice on the blockchain compliance security assessment that everyone is concerned about.
1. Blockchain technology evaluation
Blockchain technology evaluation is generally divided into functional testing, performance testing and security evaluation.
1. Functional testing
Functional testing is a test of the basic functions supported by the underlying blockchain system, with the purpose of measuring the capabilities of the underlying blockchain system.
Blockchain function testing is mainly based on GB/T 25000.10-2016 "System and Software Quality Requirements and Evaluations"Price (SQuaRE) Part 10: System and Software Quality Model", GB/T 25000.51-2016 "System and Software Quality Requirements and Evaluation (SQuaRE) Part 51: Quality Requirements and Testing Details for Ready to Use Software Products (RUSP)" and other standards to verify whether the software under test meets the requirements of relevant testing standards.
Blockchain function testing specifically includes networking methods and communication, data storage and transmission, encryption module availability, consensus function and fault tolerance, smart contract function, system management stability, chain stability, privacy protection, and interoperability , account and transaction types, private key management solutions, audit management and other modules.
2. Performance testing
Performance testing is a type of test implemented and executed to describe the performance-related characteristics of the test object and evaluate it. Most of them are used in project acceptance evaluation to verify the established Whether the technical indicators are completed.
Blockchain performance testing specifically includes high-concurrency stress test scenarios, peak impact test scenarios, long-term stable operation test scenarios, query test scenarios and other modules.
3. Security Assessment
Blockchain security assessment mainly conducts security testing and evaluation of account data, cryptography mechanisms, consensus mechanisms, smart contracts, etc.
The main basis for blockchain security evaluation is "DB31/T 1331-2021 General Requirements for Blockchain Technology Security". You can also refer to standards such as "JR/T 0193-2020 Blockchain Technology Financial Application Assessment Rules" and "JR/T 0184-2020 Financial Distributed Ledger Technology Security Specifications" based on actual testing needs.
Blockchain security assessment specifically includes storage, network, computing, consensus mechanism, cryptography mechanism, timing mechanism, personal information protection, networking mechanism, smart contracts, services and access, etc.
2. Blockchain Compliance Security Assessment
Blockchain compliance security assessment generally includes “Blockchain Information Service Security Assessment”, “Network Security Level Protection Assessment” and “Special Funding Projects” "Acceptance Evaluation" three categories.
1. Blockchain information service security assessment
Blockchain information service security assessment is mainly based on the "Blockchain Information Service Management Regulations" issued by the Cyberspace Administration of China on January 10, 2019 (hereinafter referred to as "Regulations") and refer to the national blockchain standard "Blockchain Information Service Security Specification (Draft for Comments)".
The "Regulations" aim to clarify the information security management responsibilities of blockchain information service providers, standardize and promote the healthy development of blockchain technology and related services, avoid blockchain information service security risks, and provide blockchain Provide effective legal basis for the provision, use and management of information services. Article 9 of the "Regulations" states: Blockchain information service providers that develop and launch new products, new applications, and new functions must report to the national and provincial, autonomous region, and municipality Internet Information Offices for security assessment in accordance with relevant regulations.
《Blockchain Information"Service Security Specification" is a guideline for building and evaluating blockchain information service security capabilities, led by the Institute of Information Engineering of the Chinese Academy of Sciences and jointly participated by Zhejiang University, China Electronics Technology Standardization Institute, Shanghai Information Security Evaluation and Certification Center and other units. National standard. The "Blockchain Information Service Security Specification" stipulates the security requirements that blockchain information service providers of alliance chains and private chains should meet, including security technical requirements and security assurance requirements as well as corresponding test and evaluation methods, and is suitable for guiding blockchain Chain information service security assessment and blockchain information service security construction. The security technical requirements and guarantee requirements framework proposed by the standard are as follows:
Figure 1 Blockchain information service security requirements model
2. Network security level protection evaluation
The main basis for network security level protection evaluation includes "GB/T 22239-2019 Basic Requirements for Network Security Level Protection" and "GB/T 28448-2019 Network Security Level Protection Evaluation Requirements".
As an emerging information technology, the application system built by blockchain is also an object of level protection and needs to be evaluated for level protection in accordance with regulations. The general requirements for level protection security evaluation are applicable to the evaluation of the infrastructure part of the blockchain, but currently there are no specific security requirements for the blockchain. Therefore, the expansion requirements for blockchain security evaluation still need to be further explored and studied.
3. Special fund project acceptance evaluation
According to the relevant regulations of the Municipal Economic and Information Technology Commission, information technology special fund projects are required to issue a safety evaluation report during project acceptance. The acceptance evaluation of blockchain application projects will be carried out in accordance with Shanghai’s latest blockchain local standard "DB31/T 1331-2021 General Requirements for Blockchain Technology Security".
3. Exploration and practice of blockchain security assessment
1. Standard preparation
Shanghai Assessment Center actively participates in the preparation of blockchain standards. Led by the Shanghai Evaluation Center, Suzhou Tongji Blockchain Research Institute Co., Ltd., Shanghai Qiyin Information Technology Co., Ltd., Shanghai Moheng Network Technology Co., Ltd., the First Research Institute of Telecommunications Science and Technology and other units participated in the preparation of the blockchain local standard " DB31/T 1331-2021 "General Requirements for Blockchain Technology Security" was officially released in December 2021 and will be officially implemented on March 1 this year. The blockchain national standard "Blockchain Information Service Security Specification", which the Shanghai Assessment Center participated in the preparation of, is in the stage of soliciting opinions.
At the same time, the assessment center also participated in the compilation of primary and intermediate textbooks for blockchain engineering technicians organized by the Ministry of Human Resources and Social Security and led by Tongji University, and was responsible for compiling the chapter "Testing the Blockchain System".
2. Project Practice
In recent years, the Shanghai Assessment Center has conducted a large number of blockchain security assessment practices based on relevant technical standards, including grade protection assessment, information service security assessment, project security assessment, etc. During the evaluation practice, the main security issues discovered are as follows:
Table 1 Blockchain masterIf it is a security issue
Serial number
Evaluation item
Problem description
1
Consensus algorithm
The consensus algorithm uses Kafka or Raft consensus and does not support Byzantine fault tolerance. It does not support Tolerate node malicious behavior.
2
On-chain data
On-chain sensitive information is not encrypted, and all data on the chain can be accessed through the query interface or blockchain browser.
3
Cryptographic Algorithm
The random numbers used in the cryptographic algorithm do not meet the randomness requirements of GB/T 32915-2016.
4
Node Protection
For the alliance chain, security protection measures failed to be configured for the area where the node server is located.
5
Communication transmission
When communicating between nodes, the blockchain and upper-layer applications, no secure information transmission channel has been established.
6
Consensus Algorithm
The number of nodes deployed in the system is small, and sometimes the number of fault-tolerant nodes required by the consensus algorithm is not even reached.
7
Smart Contract
The operation of the smart contract is not monitored, and problems that arise during the operation of the smart contract cannot be discovered and dealt with in a timely manner.
8
Services and Access
Upper-layer applications have access control flaws such as unauthorized and unauthorized access, leading to business confusion and data leakage.
9
Smart Contract
Smart contract coding is not standardized. When an error occurs in the smart contract, the smart contract freezing function is not provided.
10
Smart Contract
The running environment of smart contracts is not isolated from the outside, and there is a risk of external attacks.
3. Tool Application
When the evaluation center organized and compiled the "DB31/T 1331-2021 General Requirements for Blockchain Technology Security", it has considered the connection needs with the graded protection evaluation. The "infrastructure layer" security in DB31/T 1331 is consistent with the relevant requirements of the secure physical environment, secure communication network, security area boundary, secure computing environment, security management center, etc. of level protection, "protocol layer security", "extension layer" "Security" more reflects the unique security protection requirements of the blockchain.
Based on the relevant security requirements of DB31/T 1331, the assessment center is organizing and compiling extended blockchain assessment requirements. The relevant results will be applied to the network security level protection assessment tool - Assessment Expert. By then, evaluation institutions using the "Evaluation Expert" software will be able to carry out blockchain security evaluations accurately, standardly and efficiently, discover blockchain security risks, and put forward corresponding rectification suggestions

㈤ Blockchain Entrepreneurship project evaluation guide: How to judge whether a project is reliable

The key to the implementation of blockchain technology in the real economy should be based on the pain points of an industry, with a foundation and application scenarios, rather than artificial creation a newapplication scenarios. In fact, issuing a currency and upgrading a main chain cannot be called implementation. The real implementation should be integrated with the real economy, creating added value, moving away from the virtual to the real, serving the real economy, and improving the efficiency of various social activities. Efficiency is the right thing.
So, how to judge whether blockchain technology is reliable or not depends on two main points.
First, there must be a real application scenario. It doesn’t matter how small the application scenario is, but it must be valuable.
Whether blockchain technology can finally be implemented depends on many complex factors, and one of the key points is the application scenarios. To find the corresponding application scenarios, we must start from the technical characteristics of the blockchain itself, distinguish Blockchain technology can provide decentralized, non-tamperable, safe and reliable features without introducing third-party intermediaries.
Second, the application of blockchain technology must be able to solve problems rather than create them.
There are real application scenarios and the pain points in the industry have been hit, but these are not enough for blockchain technology to truly land in the real economy and achieve integration with the real economy. Because the most critical point depends on whether the problem can be solved after applying blockchain technology.
After using blockchain technology, combined with the assistance of some Internet of Things devices, investors can query the real-time and dynamic data of the project at any time, and can directly monitor the progress of the project remotely even without leaving home.
Using blockchain technology to solve problems that were originally difficult to solve, combined with real application scenarios, it has become a natural thing for blockchain technology to be implemented in the real economy.

Is blockchain a lie?

China’s blockchain development is uneven and growing wildly. As of August this year, the development level of my country’s blockchain industry is at the forefront of the world. The total number of enterprises ranks second in the world after the United States. Monitoring data from the National Internet Emergency Center’s Key Laboratory of Internet Financial Security Technology shows that there are more than 32,000 companies with the word “blockchain” or whose operations involve blockchain. Chain technology companies only account for about 10%, or even less than 10%.

In other words, there are many organizations committing fraud under the guise of "blockchain"!

Scammer's routine:

Elementary routine: Use big words to make big profits

Publicity rhetoric: "You can make a lot of money even while lying down!"

< p>The essence of the scam: Using so-called "projects" that claim high returns in professional terms to raise funds from victims, the essence is financial fraud.

Intermediate routine: play with the concept and get high dividends

Promotional rhetoric: "The benefits of the sharing economy are considerable"

The essence of the scam: illegal fund-raising (such as "Qubu" APP )

Advanced routine: high rebates for currency speculation

Promotional rhetoric: "Virtual asset financial innovation"

Scam essence: illegal pyramid schemes (such as various "digital Coin” investment project)

AT * Jiajiali Xiaocai

㈦ How to judge whether the blockchain ICO project is reliable and whether it can be invested

Although The current ICO market is chaotic and wild, but the positive side is that some excellent methods for creating and evaluating ICOs are constantly emerging.
However, in the currency circle, most people use Bitcoin ICO, and then the platform will issue some tokens to users. However, the price fluctuations of these tokens are very large. Now this model is less likely to be profitable. There is also a European crowdfunding model. Crowdfunding projects issue tokens. The tokens exist as a kind of asset certificate and have a fixed dividend mechanism.

㈧ What are the legal blockchains in China?

1. Companies that provide blockchain technology services based on alliance chains basically comply with legal regulations. It mainly includes Tencent Blockchain, Network Super Chain, JD Blockchain, Ant Blockchain, Shanghai Wanxiang Blockchain Co., Ltd., Hangzhou Qulian Technology Co., Ltd., etc.

2. Companies focusing on blockchain information services, such as blockchain information, blockchain communities, digital currency market software, etc. It mainly includes Babbitt, chain nodes, non-small accounts, etc.

3. Companies that produce mining machines and provide related computing services, such as Bitmain, Canaan, Yibang International, etc.
Extended information:
Price-to-book ratio: refers to the ratio of stock price per share to net assets per share. The price-to-book ratio can be used for investment analysis. Generally speaking, stocks with a lower price-to-book ratio have higher investment value. On the contrary, stocks with lower investment value.
Opening price: 9:15-9:25 am is the call auction time. During the call auction period, the exchange's automatic matching system only stores but does not match. When the application bidding time ends, the matching system will based on the call auction. In principle, the opening price of the stock on that day is generated. According to the regulations of the Shanghai Stock Exchange, if there is no transaction of a certain security within half an hour after the market opens, the closing price of the previous day will be the opening price of the day. Sometimes there is no transaction for a certain security for several consecutive days. The stock exchange will put forward a guide price based on the price trend of the customer's order for buying and selling the security, and then it will be used as the opening price after the transaction is completed. The average price or average offering price of securities traded over the counter on the day before listing on the first day of listing is the opening price.
Close: The closing price refers to the transaction price of the last transaction of a certain security before the end of one day's trading activities on the stock exchange. If there is no transaction on that day, the last transaction price will be used as the closing price, because the closing price is the standard for the current day's market and the basis for the opening price of the next trading day, which can be used to predict future securities market conditions; therefore, investors are optimistic about the market situation. When analyzing, the closing price is generally used as the basis for calculation.
Trading: It means that investors do not actively buy and sell, but adopt a wait-and-see attitude, causing the stock price to change very little on the day. This situation is called trading.
Consolidation: It means that after a period of sharp rise or fall, the stock price begins to fluctuate slightly and enters a stage of stable change. This phenomenon is called consolidation, and consolidation is the precursor to the next big change.preparation stage. Panjian The stock price rises slowly, which is called Panjian. A slow decline in the stock price is called a soft market. Retracement refers to the phenomenon that during the rising process of stock price, it temporarily falls back due to excessive rise. The number of transactions refers to the number of transactions of various stocks on the day. Trading volume refers to the total price of each stock traded on the day. The last bid price refers to the price that buyers want to buy after the market closes that day. The last bid price refers to the seller's asking price after the market closes that day.