Smart contract mode of virtual currency

1.

1、 Different definitions:

1. virtual currency:

virtual currency refers to non real currency

digital currency:

digital currency is an alternative currency in the form of electronic currency. Both digital gold coin and cryptocurrency belong to digiccy

3. Cryptocurrency:

cryptocurrency is a kind of transaction medium that uses cryptography principles to ensure transaction security and control the creation of transaction units

4. Token (token):

a kind of article whose shape and size are similar to currency, but the scope of use is limited and has no currency effect, and its token is the homonym of token in English

Second, the characteristics are different:

1; It can also be said that virtual currency is personalized currency. In another way, it can also be called information currency

2. Digital currency:

is an unregulated and digital currency, which is usually issued and managed by developers and accepted and used by members of specific virtual communities

Cryptocurrency:

cryptocurrency is based on the decentralized consensus mechanism, which is opposite to the banking and financial system relying on the centralized regulatory system

4. Token (token):

usually needs to be exchanged for money, used in shops, playgrounds, mass transportation and other places, as a voucher to use services and exchange goods

extended data

at present, digital currency is more like an investment proct, because it lacks a strong guarantee agency to maintain its price stability, and its role as a value measure has not yet appeared, so it can not be used as a means of payment. As an investment proct, digital currency cannot develop without trading platform, operating company and investment company

digital currency is a double-edged sword. On the one hand, the blockchain technology it relies on has been decentralized and can be used in other fields except digital currency, which is one of the reasons why bitcoin is popular; On the other hand, if digital currency is widely used by the public as a kind of currency, it will have a huge impact on the effectiveness of monetary policy, financial infrastructure, financial market and financial stability

2. Virtual currency refers to the currency that does not exist in reality and exists in a virtual state, such as bitcoin, lightcoin, Ethereum and so on; Token refers to the form of money that can be used as a monetary function and can be used to purchase goods
virtual currency can be used for shopping transactions in certain situations, such as in some places abroad; At this time, it counts as a token and plays the role of currency
but token, such as the shopping card voucher printed by the company itself, can be used for the internal consumption of the company. To some extent, it is equivalent to token; However, it is not a virtual currency
that is to say, virtual currency may be token; But token is not necessarily a virtual currency.

3. Bitcoin is not supported, only point-to-point transmission is allowed

4. Contract trading is a general term for the trading of bitcoin futures contracts
in June 2013, 796 exchange took the lead in developing the bitcoin weekly delivery standard Futures - t + 0 two-way trading virtual commodity barter contract (contract trading) in the bitcoin instry
the emergence of contract trading ended the previous history that bitcoin could not be short, and opened the prelude to the development and prosperity of bitcoin derivatives market

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5. Blockchain technology is a decentralized consensus mechanism to maintain a complete, distributed and tamperable ledger database. It can enable the participants in the blockchain to achieve a unified ledger system without establishing a trust relationship
in the future, blockchain will be applied in any field and bring great impact on human life. Blockchain technology is regarded as one of the main protocols of the next generation of value Internet. Blockchain technology will be useful in any field of proction and life that lacks trust. From digital currency to securities and financial contracts, health care, games, artificial intelligence, intelligent contracts, Internet of things, identity authentication, asset trading, e-commerce, social communication, file storage and other fields can be widely used
in the aspect of medical treatment
when the blockchain technology is used to save the personal medical records, there will be the historical data of personal medical treatment, which can be understood as the electronic medical records on the blockchain. In the future, there will be data for medical treatment or health planning, and the real master of this data is the patient himself, not the hospital or a third-party organization. In addition, these data have strong privacy, and the use of blockchain technology also helps to protect the privacy of patients
payment system
compared with the existing traditional payment system, blockchain technology can avoid the complex system, directly between the two sides of the transaction, does not involve intermediary institutions, even if part of the network is paralyzed, it will not affect the operation of the whole system. This method has the characteristics of low price, fast speed, and no intermediate fees
banking
as a digital, secure and anti-interference account, blockchain realizes the core function of Banking: the safe storage and transfer center of value. Some banks with keen sense of smell in the world have begun to actively plan to join the army of blockchain research and application in order to gain the initiative in the fierce competition in the future
identity authentication of blockchain
blockchain has the feature of being accessible to everyone. Everyone can query the block information in any place with network. The high transparency also makes blockchain full of charm. In the future, ID card and account book are basically not needed, because every identity information can be written into the blockchain. When you need to verify the information, you only need to look it up to find it
election
based on the voting transaction on the blockchain, it can be confirmed that no vote has been modified or deleted, and there will be no improper voting
Real Estate
blockchain technology can change the operation mode of the real estate market. It can combine many complex processes and cases that real estate companies usually deal with, speed up the transaction process, rece fraud, and provide more transparent and secure transactions for each participant. Provides a way to achieve paperless and fast trading needs
securities issuance and trading
the probability of various kinds of errors in general stock and other securities trading is too high, which requires manual correction, thus prolonging the time required for transaction settlement. Through the transaction of distributed ledger, the automation of the whole process can be realized, and the security and efficiency can be improved. The identity and transaction volume of the trading party are recorded on the blockchain in real time, with an open, transparent and traceable system. It is concive to the market maintenance of securities issuers and regulatory authorities, and can rece the occurrence of black box operation and insider trading
in the scenario of relatively closed, multi-party trust problems and carrying value transmission, blockchain has unique technical advantages and also shows unique charm, which has great application imagination space. At the current stage, blockchain is worth exploring in some scenarios.

6. It is said that there are a total of 150000 participants in the country. I don't know how many of them have earned. Most of them have lost money. Many of them are old people! I'm from Xi'an city. The City Express reported a few days ago. I heard that several four-star directors were arrested. Because they used the mode of pyramid selling, it's more complicated. The public security organ has no way to file a case. Now they are released again. Looking at the swindlers all day with the money cheats to eat, drink and play natural and unrestrained, we are angry and anxious, Leng is to take them no way! No one cares about the country! Think about the future to cheat well, cheat is the ability! I sincerely hope that the relevant departments will step in as soon as possible. Otherwise, the longer the delay, the less hope of getting the money back!

7. The following three points are briefly analyzed:
(1) blockchain
since 2013, virtual currency has graally attracted people's attention, and even set off a wave of upsurge of virtual currency. However, many people do not know that the real value is the background technology of virtual currency - blockchain. Virtual currency is only one of the most original applications of blockchain technology, and its rise has brought about a lot of problems, There is also an inevitable reason, that is, blockchain technology endows them with the core characteristics of fairness, impartiality and openness. The practical application of virtual currency is very few, and there is no real value support. Even some virtual currencies recognized by many countries are occasionally traded, not to mention applied. Most of them are just doing price speculation, leading to the price of virtual currency fluctuating, Extremely unstable, because of its price instability, it can not become a real currency. It is precisely because blockchain has the technology gene of fairness, impartiality and openness that almost all banks and financial institutions around the world are studying and using blockchain technology, including UBS, Citigroup, the Federal Reserve, the Bank of England, the Central Bank of China and so on. Why is blockchain so popular? Because it fundamentally enhances the banking instry, supply chain, property management and other trading networks, It is considered to be the core technology with the most potential to trigger the fifth round of disruptive revolution after steam engine, power information and Internet technology 2) (2) smart contract
these advanced applications of blockchain are called "smart contract". Smart contract is the core application that can really bring revolutionary progress. You will find that smart contract is becoming the mainstream of the market, and we will soon enter the era of smart contract
(3) quantum technology
in such a developed world of Internet, how to ensure your information privacy, how to ensure the security of your online banking password, chat records, virtual currency and everything that needs a password, all these are e to the public key and private key encryption algorithm widely used in the current Internet. If this algorithm is decrypted by the current computer, It's almost impossible to complete the task, and it often takes tens of thousands of years or even longer to decrypt. However, within 5-10 years, quantum computers will appear. When quantum computers are used to decrypt, these passwords will only take a few seconds to be decrypted. Our bank funds, social information, and virtual currency will not be safe. Therefore, we can't use quantum computers to decrypt, At present, the research against quantum decryption has become a global hot spot, including the pqcrypto and safecrypto research program supported by the European Union, the crest crypto math research program of Japan, and so on. Major enterprises have also expressed their views, such as Intel's quantum chip, Google's quantum encryption, and quantum communication technologies actively encouraged by governments, So quantum technology is the best future technology. It is not only a spear, but also a shield. It can subvert our current security system and bring us super efficient computing solutions.

8.

will not be replaced. Another important reason is that as long as one pixel of 3D code is damaged, or the color presents chromatic aberration, it may be unable to read. But now there are many electronic procts, chromaticity is not the same, there will be color difference, so it is difficult to identify. However, the QR code will not have such a situation, sometimes even some damaged information can be read completely, which does not affect the use of . So compared with the two-dimensional code, its practicability is not very strong

Although the idea of collecting patent fees from Chinese people could not be realized, Teng Hongyuan did not attach importance to the invention at the beginning, so Chinese inventors improved the QR code, which also promoted the spread of QR code in China. Three dimensional code is really good, but because both businesses and users are used to two-dimensional code, it is almost impossible for three-dimensional code to replace two-dimensional code in a short time< after all, although 3D code is better than 2D code, 3D code also needs to be swept. So even if 3D code can replace 2D code, it is estimated that it will be many years later. After all, it takes a long time for users to get used to it

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