Implementation of digital currency legal system

4. bitcoin, of course, is the hottest one. In addition to bitcoin, there are also:
1. Litecoin is similar to bitcoin, which is also an encrypted digital currency, and its price has risen sharply recently. It is a P2P open source digital currency, which can be regarded as a branch of bitcoin. However, although lightcoin is based on bitcoin protocol, it does not require very high computing power. It can also be mined using ordinary computers. Lightcoin's algorithm comes from the algorithm designed by Dr Colin Percival for tarsnap secure online backup service (backup for Linux and other open source operating systems)
2. Namecoin
namecoin is also based on bitcoin, which is another branch of open source. Namecoin is a distributed DNS protocol -- generally speaking, it can transform the website name (such as ifeng. Com) that can be understood by human into the address that can be understood by machine. As its own DNS, this kind of currency can operate outside the normal Internet, so it can break away from the control of ICANN
the monetary value and domain name of namecoin are stored in the user's blockchain records, limiting the total number to 21 million
3. Peercoin
peercoin is a peer-to-peer variant of bitcoin, which can improve mining efficiency and security, and improve safeguard measures to avoid group mining. Now, group mining has been considered as a potential defect of bitcoin. According to the statistics of emerging currencies by coinmarketcap.com, peercoin currently ranks fourth in the market value of digital currencies
4. Primecoin
primecoin is a cryptocurrency similar to bitcoin, but it uses a completely independent mining algorithm. Bitcoin uses the hashcash algorithm, while prime coin uses the long Cunningham chains to create the value of money - a sequence of prime numbers named after mathematician AJC Cunningham
in the process of bitcoin mining, as the amount of money goes on, the difficulty will increase sharply. But prime is different. Every time a primecoin is mined, the mining difficulty will increase slightly, and the process is much more stable< 5. Feathercoin

based on the design of litecoin, released in April 2013, can adjust the mining difficulty more frequently than litecoin. Feathercoin will be updated frequently, adding new features and improvements to eliminate malicious mining behavior

6. Novacoin

another P2P digital cryptocurrency. Novacoin is different from most other currencies in that it integrates a protection mechanism in the currency core, which can identify illegal mining activities

the total number of novacoin is limited to 2 billion, which is considerable. If necessary, the total can be adjusted upward

7, infinitech

published in June 2013. A by-proct of litecain. According to the mining situation and the total amount of money, infinite money can frequently adjust the mining difficulty ratio< Megacoin was only released in the fourth quarter of 2013, imitating bitcoin in the early stage. The total number of megacoin is limited to 42 million, which can be mined like other virtual currencies. Its biggest selling point is brand publicity, which other digital currencies lack< It was released in 2013 and is still in its infancy. In the security part of quarkcoin, nine independent loops are deployed and six different algorithms are used.

5. There is no digital currency issue

6. Well, this is the answer given by my teacher

A: filter some common database operation keywords,
select, insert, update, delete, and, * etc., or filter the content through the system function addslashes
register in PHP configuration file_ globals=off; Set to off state. (the function will close the registered global variables); If receiving the value of post form, use$_ POST[' user'], If it is set to on, the value will be received by $user.
when writing SQL statements, try not to omit small quotation marks (the one above tab) and single quotation marks.
improve the skills of database naming, and name some important fields according to the characteristics of the program, so that they are not easy to be guessed.
encapsulate common methods to avoid directly exposing SQL statements.
Open PHP safe mode_ Mode = on
Open magic_ quotes_ GPC is used to prevent SQL injection. It is turned off by default. When it is turned on, it automatically converts the SQL query statement submitted by the user to & quot&# 39;& quot; Convert to & quot&# 92;&# 39;& quot;
control the output of error message, close the error message prompt, and write the error message to the system log
preprocess with mysqli or PDO

7. It's very good to go to the central hospital. The technology of the original Qingfang hospital is very good and cheap. If you're not nervous, you can choose a private hospital, such as Mary. If you choose a public hospital, the Affiliated Hospital of Qingyi is good. But the beds are tight. I suggest you go to the central hospital because it's the original Qingfang hospital, Qing textile workers used to be 100000, so the technology of giving birth is very good, and the cost of his family is low. Don't think that the cost is low, but the level is not enough. Now some hospitals only use expensive drugs instead of right ones. It's better to use less drugs after giving birth. Here's a suggestion for you to consider

8. We put in the money, and now there's no news.

9.

Guangxi longyingtianxia has been confirmed to be suspected of pyramid selling and is under investigation

the main company of longying world is Guangxi longying marketing planning Co., Ltd., which has been listed in the list of abnormal operation for failing to submit annual report information and publicizing enterprise information, concealing the true situation and practicing fraud, and has been subject to administrative punishment for violating tax management regulations

the following are part of the "blacklist":

214, xinlianhe (far away)

215, qianoo advertising machine (far away)

216, Mingchen International (running away)

217, yinshangbao (far away)

218, Yinhe blockchain (far away)

219, Shaanxi hongshaan Valley (running away)

220, Shaanxi Hongguo (running away)

221, Shaanxi Xi'an gangrong Technology (running away)

222 Longxi group (far away)

223, longyingtianxia (abnormal platform)

224, Jimei Baijia (restart and renamed)

225, Xuexiang Tesco (cash withdrawal difficulty)

< H2 > extended information:

according to the investigation of China Youth Daily · Zhongqing online reporter, the "two barrels of oil" and "Li Gui" in Zhejiang market are not as simple as a rumor refuting announcement. A company in Guangdong also organized an attack on "China oil card" on social media

"in the past, when Shanzhai gas cards were overturned in other areas, we felt that they were far away. This time, the" Zhongyou card "went straight to Yongtaiwen area in Zhejiang Province, making people feel more nervous than ever before." Jiang Zhiyong, director of the gas station management department of PetroChina Zhejiang sales company, said with the publicity materials distributed at the news conference of the Wenzhou Branch of "China Petroleum card"

in the business hall of Sinopec Cixi gas station, a man told a woman that after running Sinopec gas card, he could download an app on his mobile phone, register and bind the gas card, and get 4000 yuan discount by recharging 15000 yuan through the app. The staff of the business hall reminded the lady not to believe in such preferential activities

claims that it is a large-scale comprehensive wealth platform based on Internet plus energy and employment, and its members are both consumers and market promoters, thus achieving mass employment and entrepreneurship. Ordinary consumers who download the "Zhongyou card" app on their mobile phones must input their mobile phone number, verification code, and the name and mobile phone number of the previous introcer. They can only register and log in after strict audit

"'petrochina card 'does not issue cards at all, nor is it based on Sinopec's platform and system operation. Instead, it parasitizes its business model on Sinopec and other regular gas cards, and in addition, it pulls a group of people and develops a system to expand everywhere." Relevant personnel of Sinopec Zhejiang oil company's Publicity Office said that its essence is to let Sinopec and PetroChina "carry the black pot"

the relevant business departments of Sinopec and PetroChina Zhejiang company said that it was "impossible" for the "CNPC card" to promise the high return of recharging its members. According to the sales revenue and cost data of gasoline and diesel provided by the company, taking the air recharge of 15000 yuan for 4000 yuan package as an example, 15000 yuan can add more than 2400 liters of gasoline

"two barrels of oil" business department related staff pointed out that Shanzhai gas cards often take the money from home to make up for the price difference, drum style continues to develop new members. What's more, when members reach a certain scale and amount of capital, they can make up the capital gap with the return of investment in other fields, in which the potential legal risk and capital risk are very large

in recent years, with the rapid development of the Internet and social media, all kinds of fake gas cards come out in a variety of ways, and become "little strong" repeatedly. In 2012, the company launched a PC version of its official website, and some Internet experts imitated the webpage and linked to "phishing" websites to defraud customers of their top up money

WeChat official account, some people registered "petro technology" and "micro refueling" for their lives. They announced that they would get "Sinopec" thanks to the message that they could get the 200 yuan Sinopec fuel card free. Within a short time, the news was wildly forwarded in the circle of friends, and Sinopec Ningbo Branch's gas card customer service hotline constantly received calls from customers to inquire about and verify the problems such as the return of pre charging fees to cash

then, a "China Petroleum Reserve" card suddenly appeared in Zhejiang, claiming that as long as customers fill up gas at Sinopec and PetroChina gas stations, issue invoices, take photos and upload them to the app platform, they will rebate according to the preferential amount“ The "zhongchu oil" card didn't run for long before it went out of business. Now Zhejiang has another "Zhongyou card"

"the most important thing is that the cost of breaking the law is low and it is difficult to crack down on."“ "Two barrels of oil" related staff said that even if Sinopec and PetroChina outlets monitored the market for fake gas cards, they would at most issue a public statement, or even be unable to report the case to the police. Because "the one who is injured will report", Sinopec and PetroChina are not direct victims and cannot report to the police

recently, Sinopec and PetroChina informed Taizhou market supervision and Administration Bureau of the suspected false publicity and other relevant information about the opening of "PetroChina card" in Taizhou. After on-site investigation and evidence collection, the law enforcement officers of the Bureau ordered them to rectify the behaviors beyond the scope of business license. However, a person concerned told China Youth Daily · Zhongqing online that "the business of" Zhongyou card "in developing members' air recharge has not stopped because of this."

10. To design digital currency, we need to consider the following things:
first, we need to clarify the concept, definition, classification, functions and characteristics of digital currency, put forward the Chinese definition of digital currency, distinguish the similarities and differences and relations between legal digital currency and private digital currency in technical characteristics, economic characteristics and institutional arrangements, and discuss the process of digital currency performing monetary functions, And how to meet the requirements of a high-quality monetary system
Second, we need to conct in-depth research on the operation of digital currency, and explore the issuance, circulation, transaction and withdrawal mechanism of digital currency based on the al system of central bank and commercial bank. On this basis, the selection of technical route and key technology to meet its operation mechanism is discussed, and the key technology research and breakthrough are carried out
thirdly, we should study the effect and influence of digital currency on monetary and financial operation system
fourthly, based on the above research results, the scientific top-level design of digital currency supervision is formed, including the development and design of digital currency, the development of applicable regulatory coordination tools, and the selection of appropriate regulatory indicators
more importantly, the digital currency that the central bank plans to issue is different from bitcoin, Leyte, dogcoin, decent and other digital currencies.