Academician of blockchain, Renmin University of China

1.

blockchain includes public blockchain, joint (instry) blockchain and private blockchain. Public chain point-to-point e-cash system: bitcoin, smart contract and decentralized application platform: Ethereum

blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies

blockchain is an important concept of bitcoin. In essence, it is a decentralized database. At the same time, as the underlying technology of bitcoin, it is a series of data blocks generated by using cryptographic methods. Each data block contains a batch of bitcoin network transaction information, Used to verify the validity of its information (anti-counterfeiting) and generate the next block

extended data

according to the different degree of blockchain network centralization, three kinds of blockchains under different application scenarios are differentiated:

1. The blockchain with the whole network open and without user authorization mechanism is called public chain

2. The authorized nodes are allowed to join the network, and the information can be viewed according to the authority. It is often used in the inter agency blockchain, which is called alliance chain or instry chain

3. All the nodes in the network are in the hands of one organization, which is called private chain

alliance chain and private chain are also called licensing chain, and public chain is called non licensing chain

blockchain features

1, decentralization. Blockchain technology does not rely on additional third-party management institutions or hardware facilities, and there is no central control. In addition to the self-contained blockchain itself, each node realizes information self verification, transmission and management through distributed accounting and storage. Decentralization is the most prominent and essential feature of blockchain

2. Openness. Blockchain technology is based on open source. In addition to the private information of all parties involved in the transaction is encrypted, the data of blockchain is open to everyone. Anyone can query blockchain data and develop related applications through the open interface, so the information of the whole system is highly transparent

3. Independence. Based on consensus specifications and Protocols (similar to various mathematical algorithms such as hash algorithm used by bitcoin), the whole blockchain system does not rely on other third parties, and all nodes can automatically and safely verify and exchange data in the system without any human intervention

4. Safety. As long as 51% of all data nodes cannot be controlled, the network data cannot be arbitrarily manipulated and modified, which makes the blockchain itself relatively safe and avoids subjective and artificial data changes

5. Anonymity. Unless there are legal requirements, technically speaking, the identity information of each block node does not need to be disclosed or verified, and the information can be transferred anonymously

2.

Blockchain is a new application mode of distributed data storage, point-to-point transmission, consensus mechanism, encryption algorithm and other computer technologies. Blockchain is an important concept of bitcoin. It is essentially a decentralized database. At the same time, as the underlying technology of bitcoin, it is a series of data blocks generated by using cryptographic methods. Each data block contains a batch of information about bitcoin network transactions, Used to verify the validity of its information (anti-counterfeiting) and generate the next block

if such technology wants to be put into application, the biggest problem is the "Impossible Triangle problem"

that is, scalability, decentralization and security cannot be achieved at the same time, and only two of them can be achieved

most of the existing public chain projects in the market are difficult to put into use on a large scale

3.

Shaoyang sanlongtong blockchain Technology Co., Ltd. is another limited liability company incorporated on October 18, 2018, with its registered address at the 4th floor of beehive maker, Shaoyang Economic Development Zone, Shaoyang City, Hunan Province

the unified social credit code / registration number of Shaoyang sanlongtong blockchain Technology Co., Ltd. is 91430500ma4q1kwr2e, and the enterprise legal person is long Zhiqiang. At present, the enterprise is in business

the business scope of Shaoyang sanlongtong blockchain Technology Co., Ltd. is: information technology consulting services; Research, development and application of blockchain technology; Blockchain technology consultation and technology transfer; Supply chain management and service; Internet of things technology services; Research and development of Internet of things technology; Internet of things technology consulting; Research and development of big data processing technology; The development and construction of e-commerce platform; Network integration system construction, maintenance, operation, leasing; The first kind of value-added telecommunication service is domestic multi-party communication service Without approval, it is not allowed to engage in P2P online lending, equity crowdfunding, Internet insurance, asset management, and cross-border Internet financial services such as finance, third-party payment, virtual currency trading, ICO, illegal foreign exchange, etc. (projects that need to be approved according to law can only be carried out with the approval of relevant departments)

check more information of Shaoyang sanlongtong blockchain Technology Co., Ltd. through aiqicha

4.

Information security major postgraate entrance examination directions are:

1. Big data direction: big data direction is mainly for the management and processing of massive data, the traditional data processing mode is meaningless in front of big data because of its long processing time, so new algorithms and processing mode are needed to deal with the complex data, and the threshold of big data direction is relatively high

however, with the maturing of previous algorithms, the threshold is graally decreasing, the employment situation is relatively excellent, the combination of big data and cloud computing technology has high upper and lower limits, and its learning difficulty is not low

AI direction: AI direction is more in the exploration of theory, and there are relatively few technologies to be implemented, which also leads to its high threshold and lower lower limit compared with ordinary people. However, its subordinate technologies such as NLP, machine learning, text recognition, image recognition and so on still have good prospects, This aspect of technology professional demand is very wide, not only technology, mathematics, discrete knowledge is also its necessary subjects

for beginners, the friendliness is low, and in terms of career prospects, it tends to be algorithm analysis architecture, which has a good prospect

3. Traditional computer direction: the high dividends of Internet companies undoubtedly bring dividends to the pure software direction. However, with the saturation of middle and low-end talents, the high salary of the Internet is graally biased towards the real technical talents. The traditional computer direction can also get a good prospect, and choose the relevant direction according to personal interests, In order to have a better motivation to move forward, so as to achieve their own goals

extended materials:

the postgraate entrance examination direction of information security specialty is specific to college learning, and its research direction and focus are quite different. It is worth noting that, in addition to the basic information security major, there are also majors that intersect arts, science and engineering

for example, there are computer art design, web design, film and television animation design, environmental art design and so on

The interdisciplinary majors of science and engineering include: Mathematics and applied mathematics, automation, information and computing science, communication engineering and so on. It can be seen that the computer professional learning content is very wide, and computer applications are constantly procing new majors, professional prospects are good< br />

5.

Wu Xiaoqiu, vice president of Renmin University of China and director of the Institute of finance, said at a media conference on the 8th that he has always kept a wait-and-see attitude towards blockchain, but highly praised the penetration of Internet finance. Wu Xiaoqiu stressed: the things people like must have its logic. I don't think these Regulations are appropriate to limit the amount of our third-party payment. I think our supervision and management should understand the trend of financial development and follow the trend

Therefore, if this assumption is not tenable, we must not make a literal interpretation of some things, and do not force them into the middle of the tradition. What the common people like must have its logic, and you must study why the common people like it? You should not put things that people like. For example, I also see restrictions on the amount of third-party payment. 500 yuan is the end of a day. Sometimes, two meals are more than 500 yuan. I don't think these Regulations are appropriate. I think our supervision and management should recognize the trend of financial development, follow the trend, and not go against the trend

6. The common situation of not being able to pay out the fund is that e to its own account information error, the default bound bank account information input is wrong or the deposit and withdrawal accounts are not the same account. Repeat the operation to verify<

it violates the deposit rules of the trading platform
some trading platforms require that if investors still have positions, the funds in the account should not be less than 80% of the margin. There may even be other terms that need to be understood before cooperation

there is also a situation that gold can not be paid on holidays, so investors should understand the rules of the platform before choosing the dealer platform, including rules, whether there is a limit, time limit, etc

it's true that there are some special cases, such as platform upgrade system, but in general, reliable platforms will inform you in advance

when you open an account, you participated in the platform's donation activities, and the total amount of donation can't take up the part of the donation

if the bank fails to accept the audit, the bank trusteeship will accept the deposit and withdrawal operation, and if either party makes mistakes, the bank will fail to pass the audit. Or the problem of the speed of the bank in and out of the money business, there is a phenomenon of queuing. If there is a peak, the payment will be slower

encountered black platforms
there are many black platforms that have been exposed and can not make money, such as purton, Qiangli foreign exchange, yingkuan finance, etc. Of course, there are many things that have not been exposed. They may be expanding crazily. We should be alert at any time. In particular, the so-called domestic platform, domestic enterprises to do foreign exchange trading business itself is illegal
if investors encounter problems in foreign exchange trading, such as slow payment and platform running, they can all be reflected in the "exposure platform" of Tianyan. Generally, these information can get the attention of relevant dealers at the first time. Under the pressure of investors, other instry regulators and peers, the traders will try their best to timely disclose the vicious things in the foreign exchange instry exposed in Tianyan, So that investors can get a satisfactory answer to their questions
according to the relevant person in charge of Forex Tianyan, since the Forex Tianyan "exposure platform" function was launched, it has solved the real problems for tens of thousands of investors and successfully recovered the losses.

7. No tickets, just go in. I went yesterday. There are clothing, tea, food, jewelry and other commodities.

8. The current stock market is too complex. Due to the lack of supervision, many platforms are wandering in the gray area. But as long as you do something illegal in advance, you will be able to safeguard your rights and interests and recover normally!