There are two types of virtual currency

1. In addition to bitcoin, there are many other virtual currencies in the virtual world< Liteoin (LTC) was released on October 7, 2011, and is currently the most valuable counterfeit currency, accounting for about 2% of BTC's market value. The current unit price is US $2.31, with a total currency value of US $38 million

this is also a distributed (decentralized) digital currency. Unlike the sha256 mining algorithm used by bitcoin, LTC adopts scrypt algorithm. Scrypt algorithm uses sha256 as its subroutine, and scrypt itself needs a lot of memory. Each hash is used as the seed of the input, and then it needs a lot of memory to store another pseudo-random sequence to generate the pseudo-random points of the sequence and output the hash value. In the mining of BTC (bitcoin), it is not enough to rely on simple graphics card mining (it takes about ten to dozens of days to dig a BTC with general configuration graphics card). The emergence of various expensive mining machines has raised the threshold for ordinary people to get BTC through mining, while LTC has certain advantages in using PC graphics card mining This passage comes from Zhihu.)

compared with BTC, litecain has made a little improvement in technology. If BTC is gold now, LTC is silver for the time being

the biggest advantage of litecoin is that it can confirm the authenticity faster. The virtual currency is designed and maintained by Charles Lee. Bitcoin transactions need to be verified, and the average verification time is more than 10 minutes. Most transaction websites need 1 hour to verify. The average transaction confirmation time of liteoin is 2.5 minutes. Developers claim that shortening the verification time increases the practicability of virtual currency. The bitcoin mining efficiency of customized machine and AMD GPU is the highest, making it almost unprofitable for miners using CPU mining. Litecain's mining excludes GPUs and custom processors, so it doesn't rely too much on a small number of professional miners

ppcoin

ppcoin (PPC) was released on August 19, 2012, which has improved the original technology of BTC. Use proof of make and add the concept of coin age

ppcoin is a bifurcated project of bitcoin, which aims to achieve energy efficiency and maintain the best performance of the original bitcoin as far as possible. The unit price of ppcoin is US $0.22 and the total currency value is US $4 million

ppcoin does not have a fixed upper limit of money supply, but it does not mean that ppcoin has obvious inflation compared with bitcoin. Bitcoin can be compared to gold. The annual inflation rate of gold is about 1-3%. Although gold has no known upper limit of money supply, we still know that it is a reliable scarce commodity

ppcoin has two types of casting: work certificate and equity certificate. The coinage rate of working proof is affected by Moore's law, which depends on the doubling of our working proof ability. What we all know is that Moore's law will eventually come to an end. By then, the ppcoin of inflation may be close to the gold level. The annual maximum inflation rate of certificate of equity is 1%. At the same time, ppcoin's transaction costs were destroyed to fight inflation. So on the whole, the coin design of ppcoin is still a very low inflation design in the future, which can be comparable with bitcoin<

ppcoin's reward is similar to lottery, which will determine the winning probability according to the number of ppcoin held by miners. Sunny king, one of the founders, said that their design is based on a new concept of long-term energy efficiency

terracoin

terracoin (TRC) was released on October 26, 2012, with a total currency of 42 million. The speed of each block is 2 minutes, slightly faster than LTC. There is not much special in technology, similar to the proction of BTC halved every four years

however, the operation team seems to have a strong business background and may be better than other bitcoins in circulation. The development of virtual currency is getting more and more attention. Now some teams with business background will accelerate the development of virtual currency

namecoin

namecoin is a distributed domain name system based on bitcoin technology. Its principle is the same as bitcoin. The first release date of this open source software is April 18, 2011

namecoin is generated from an original block which is different from bitcoin's main trading block. It uses a new blockchain, which is independent of bitcoin's blockchain. Because it is based on bitcoin, the security, distribution, robustness, encryption and migration of domain names are guaranteed mathematically. You can dig bitcoin and namecoin at the same time

this project was discussed and proposed by bitdns, which is mainly dissatisfied with the defects of DNS. The only top-level domain name of namecoin is. Bit. It costs namecoin to register a. Bit domain name

in addition, Q currency, Shanda currency, starting point currency and various online game currencies are also virtual currencies.

2. Virtual currency refers to non real currency. Well known virtual currencies, such as online currency of Internet company, q-coin of Tencent company, q-point and voucher of Shanda company, micro currency launched by Sina (used for micro games, Sina reading, etc.), chivalrous Yuanbao (used for chivalrous road game), silver grain (used for bixue Qingtian game), and popular digital currencies in 2013 include bitcoin, Laite coin, infinite coin, quark coin, zeta coin, etc Barbecue coins, pennies (Internet), invisible gold bars, red coins, prime coins. At present, hundreds of digital currencies are issued all over the world. Popular in the circle & quot; The legend of "bitcoin, Wright silver, infinite copper, pennies aluminum". According to the notice and announcement issued by the people's Bank of China and other departments, virtual currency is not issued by the monetary authority, does not have legal compensation and mandatory monetary attributes, is not a real currency, does not have the same legal status as currency, cannot and should not be used as currency in the market circulation, citizens' investment and transaction of virtual currency is not protected by law

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3. There are many kinds of virtual currency, but after all, bitcoin is famous. In addition, Haiyun integral, Kent, Wright, doggy and so on are also attached. For example, the entry threshold of bitcoin is relatively high. Recently, bitcoin has risen to 5K

Lexiang points is the latest currency discovered by btc100 trading platform, which is also a virtual currency, and can also enjoy the dividends of the platform. For example, in the early stage of new currency issuance, the price is relatively low, and then it depends on the rising space in the later stage. However, I think there should be a lot of room for the rise of virtual points, because we can enjoy the dividends of platform proceres.

4. In addition to bitcoin, there are many other virtual currencies in the virtual world< Liteoin (LTC) was released on October 7, 2011, and is currently the most valuable counterfeit currency, accounting for about 2% of BTC's market value. The current unit price is US $2.31, with a total currency value of US $38 million

this is also a distributed (decentralized) digital currency. Unlike the sha256 mining algorithm used by bitcoin, LTC adopts scrypt algorithm. Scrypt algorithm uses sha256 as its subroutine, and scrypt itself needs a lot of memory. Each hash is used as the seed of the input, and then it needs a lot of memory to store another pseudo-random sequence to generate the pseudo-random points of the sequence and output the hash value. In the mining of BTC (bitcoin), it is not enough to rely on simple graphics card mining (it takes about ten to dozens of days to dig a BTC with general configuration graphics card). The emergence of various expensive mining machines has raised the threshold for ordinary people to get BTC through mining, while LTC has certain advantages in using PC graphics card mining This passage comes from Zhihu.)

compared with BTC, litecain has made a little improvement in technology. If BTC is gold now, LTC is silver for the time being

the biggest advantage of litecoin is that it can confirm the authenticity faster. The virtual currency is designed and maintained by Charles Lee. Bitcoin transactions need to be verified, and the average verification time is more than 10 minutes. Most transaction websites need 1 hour to verify. The average transaction confirmation time of liteoin is 2.5 minutes. Developers claim that shortening the verification time increases the practicability of virtual currency. The bitcoin mining efficiency of customized machine and AMD GPU is the highest, making it almost unprofitable for miners using CPU mining. Litecain's mining excludes GPUs and custom processors, so it doesn't rely too much on a small number of professional miners

ppcoin

ppcoin (PPC) was released on August 19, 2012, which has improved the original technology of BTC. Use proof of make and add the concept of coin age

ppcoin is a bifurcated project of bitcoin, which aims to achieve energy efficiency and maintain the best performance of the original bitcoin as far as possible. The unit price of ppcoin is US $0.22 and the total currency value is US $4 million

ppcoin does not have a fixed upper limit of money supply, but it does not mean that ppcoin has obvious inflation compared with bitcoin. Bitcoin can be compared to gold. The annual inflation rate of gold is about 1-3%. Although gold has no known upper limit of money supply, we still know that it is a reliable scarce commodity

ppcoin has two types of casting: work certificate and equity certificate. The coinage rate of working proof is affected by Moore's law, which depends on the doubling of our working proof ability. What we all know is that Moore's law will eventually come to an end. By then, the ppcoin of inflation may be close to the gold level. The annual maximum inflation rate of certificate of equity is 1%. At the same time, ppcoin's transaction costs were destroyed to fight inflation. So on the whole, the coin design of ppcoin is still a very low inflation design in the future, which can be comparable with bitcoin<

ppcoin's reward is similar to lottery, which will determine the winning probability according to the number of ppcoin held by miners. Sunny king, one of the founders, said that their design is based on a new concept of long-term energy efficiency

terracoin

terracoin (TRC) was released on October 26, 2012, with a total currency of 42 million. The speed of each block is 2 minutes, slightly faster than LTC. There is not much special in technology, similar to the proction of BTC halved every four years

however, the operation team seems to have a strong business background and may be better than other bitcoins in circulation. The development of virtual currency is getting more and more attention. Now some teams with business background will accelerate the development of virtual currency

namecoin

namecoin is a distributed domain name system based on bitcoin technology. Its principle is the same as bitcoin. The first release date of this open source software is April 18, 2011

namecoin is generated from an original block which is different from bitcoin's main trading block. It uses a new blockchain, which is independent of bitcoin's blockchain. Because it is based on bitcoin, the security, distribution, robustness, encryption and migration of domain names are guaranteed mathematically. You can dig bitcoin and namecoin at the same time

this project was discussed and proposed by bitdns, which is mainly dissatisfied with the defects of DNS. The only top-level domain name of namecoin is. Bit. It costs namecoin to register a. Bit domain name

in addition, Q currency, Shanda currency, starting point currency and various online game currencies are also virtual currencies.

5. It is mainly divided into game currency and digital currency

game currency: Tencent's QQ currency, developed and operated by Tencent, has a fixed price and a limited range of use

digital currency: for example, bitcoin, which is decentralized, circulates globally, and its price fluctuates greatly.

6. Virtual currency is not a fund, it is a new technology, represents a kind of encrypted digital assets, interested friends can pay attention to me, bring mutual communication, I have a group.

7. Yes, on April 3, 2019, Changsha blockchain public platform project was officially launched at the "2019 Internet Yuelu summit" blockchain Technology Application Forum with the theme of "cross border integration, chain creating the future" sponsored by Changsha high tech Zone, with the Ministry of instry and information technology and Hunan Provincial People's government as the guiding units.

8.

According to the definition of the European Central Bank in 2012, "a kind of digital currency that is not legally binding, issued and controlled by developers, and accepted and used in specific virtual community members."

at the 2013 congressional hearing, Federal Reserve Chairman Ben Bernanke said that "in the past two decades, virtual currency has been regarded as an electronic currency, or a payment system technology field that has been developing."< In 2013, the financial crime enforcement network (FinCEN) of the U.S. Department of the Treasury defined it as: "virtual currency is a medium of exchange that operates like real currency in some environments, but it does not have all the attributes of real currency." It also has no legal tender status. In 2014, the European Banking authority defined it as "a digital form of value that is not issued by central banks or government departments and is not necessarily associated with legal tender, but it is accepted by natural and legal persons as a means of payment and can be transferred, stored and traded electronically

in Chinese mainland refers to the currency that runs on the Internet, and the famous virtual currency, such as Tencent Inc's Q coins and the grand company's roll, also has virtual currency in online games. Virtual currency is usually used for users to purchase virtual services on the network, such as QQ membership function of Tencent's QQ coin, online game equipment, etc. Virtual currency is usually a means of payment. For example, the Ministry of culture of the people's Republic of China defined it in 2009 as a virtual exchange tool that is issued by online game operators, directly or indirectly purchased by game users using legal tender in a certain proportion, existing outside game programs, stored in servers provided by online game operators in the form of electromagnetic records, and expressed in specific digital units

data source: virtual current from Wikipedia

9. 1) Hand painted counterfeit money. This is a of the real money. Generally, the quality is poor, but in the past, it was a common counterfeit money. It is characterized by the use of ordinary offset paper or writing paper, the color is the general painting pigment or advertising color, it seems that the tone is uneven, the color and pattern is quite different from the real coin. This kind of counterfeit banknote is easy to identify, but the elderly and children are easy to be cheated 2) Wax printed counterfeit banknotes. This is a counterfeit banknote hand engraved with wax paper and mimeograph. In general, the method of making is to carve patterns on the wax paper according to the appearance of real coins, and then print them on the paper with black and white ink, and then color the patterns. Some of them are printed on wax plate with color ink. It is characterized by light and heavy engraving techniques, which makes the ink leakage of the stencil more or less different. As a result, the colors are different in depth, which is very inconsistent, and the places with too much ink leakage are prone to oil immersion. Because the wax paper is soft, it is easy to deform the pattern in printing. Therefore, this kind of counterfeit banknote is easy to identify 3) Stone printed counterfeit banknotes. This is a counterfeit banknote printed by lithography and lithography machine. Its proction method is usually hand carved or machine carved on a stone plate, and then printed on a small machine. Although the quality of this kind of counterfeit banknote is better than the above two kinds of counterfeit banknotes, the printing effect is still poor. Because the stone plate is hard, it is easy to appear ink overflow or oil immersion phenomenon. And because the surface of the printing plate is not flat, so that the printed pattern is different, the picture is not harmonious. Because the printing plate is not accurate, the register printing is not very accurate, resulting in overlap, dislocation, white leakage and other problems, which is easy to identify 4) Hand engraved counterfeit banknotes. This is a counterfeit banknote printed on a wooden plate. This kind of counterfeit banknote is made by using wood as the base material and hand carving method to make relief plate, which is printed on small machines. It is also characterized by poor quality. Due to the natural wood grain of the board, the inking degree of the grain is different from that of the non grain, so the printed patterns are often deep and light, the color registration is not accurate, and there are overlapping, dislocation and other phenomena, which are easy to identify 5) Rubbing counterfeit banknotes. This is a counterfeit banknote printed with real money. Its proction method is based on the real money, using some chemicals to make the pattern ink on the real money separated from part of the rubbing to another paper to form counterfeit money. This kind of counterfeit banknote is also called rubbing banknote. Its pattern and pattern are exactly the same as the real banknote. It is impeccable, but because it only gets part of the ink on the real banknote, the ink color is lighter, and the picture shape appears thin and elegant, giving people a feeling of crispy film. After rubbing, the real coin also suffered some damage, some of which became light in color or blurred in pattern, which is also called rubbing coin. Although the rubbinged currency is formed by real currency, there must be rubbinged counterfeit currency behind it, so it is more noteworthy 6) Copy synthetic counterfeit banknotes. This is a counterfeit banknote made by a black and white copier. Its proction method is to first the black and white pattern of real money on the copier, and then use the method of color overprint to synthesize counterfeit banknotes. The printing effect of this kind of counterfeit banknote is more refined than that of all kinds of counterfeit banknotes mentioned above, but in the face of various anti-counterfeiting measures of RMB, its imitation is powerless, especially in the aspects of paper, ink, etc. it is difficult to be genuine, and it can be identified by certain methods 7) Counterfeit banknotes. This is a counterfeit banknote forged by a special machine. It is usually made by hand or machine engraving plate, or using photography, electronic scanning color separation plate, printed on small and medium-sized printing press. There are two kinds of counterfeit banknotes: offset banknote and gravure banknote. This kind of counterfeit banknote has a realistic effect, a large number of one-time printing, easy to spread and great harm. Although it adopts advanced equipment and indivial printing technology of real currency, it is easy to confuse the real with the fake, but it is impossible to use all the anti-counterfeiting technology of RMB. There are still various loopholes and traces of forgery, which can be identified by certain methods 8) Color counterfeit money. This is a counterfeit banknote forged by color ing equipment. The proction of this kind of counterfeit banknote needs more advanced color ing equipment, which can not be solved by ordinary forgers. Color is easy to be true to life in pattern and scene, but it is obviously different from real coin in paper, ink and gravure printing. Its defects can be seen through certain instruments or high-power microscope 9) Photo counterfeit. This is a counterfeit banknote made of genuine banknotes. It is made by taking and developing the real coin into a picture and then cutting and pasting it. The paper of this kind of counterfeit banknote is thick and brittle, easy to break, and the surface of the counterfeit banknote is glossy, which is different from the real banknote and easy to identify 10) Cut and paste counterfeit banknotes. This is a counterfeit banknote made by cutting and pasting pictures of real banknotes. It is made by cutting the pictures of RMB printed on newspapers, magazines or picture books and gluing the front and back together. This kind of counterfeit banknote is very different from real banknote. The paper of newspaper pictures is thin and soft, and the paper of picture album pictures is generally thick and brittle, and the color and size of the coin surface are different, so it is easy to identify.

10. Currency category
table of contents
1 Abstract
2 basic information
3 basic introction
currency category refers to the names of currencies in the world today. Now each country has its own currency, with various kinds and names. From the perspective of international trade payment, it can be roughly divided into two categories: freely convertible currency, also known as convertible currency. The holder of this currency can convert it into the currency of any other country without any restrictions. At present, more than 50 countries in the world have accepted the provisions of the International Monetary Fund Agreement on currency convertibility, and their currencies are considered as freely convertible currencies. These include US dollar, British pound, German mark, Japanese yen, Swiss franc, Italian lira, Dutch guilder, Belgian franc, Danish krona, Swedish krona, Norwegian krona, Austrian shilling, Hong Kong dollar, Canadian dollar, Australian dollar, Singapore dollar, etc

basic information

Chinese name
currency type
foreign name
type of currency
definition
refers to the names of currencies in the world
freely convertible currency and non freely convertible currency
basic introction
non freely convertible currency can be divided into limited freely convertible currency and non freely convertible currency. The former refers to the currency of a country that allows payment and capital transfer in international economic transactions, but imposes various restrictions; The latter refers to the currency of a country whose economy is completely closed. China's RMB is a non freely convertible currency<

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