Paper money and digital currency security
the functions and properties of digital currency are exactly the same as paper money, but its form is digital Mu Changchun, director of the digital currency Research Institute of the central bank, said that the central bank's digital currency is a digital alternative to paper money, that is, digital currency and electronic payment tools. If we regard the digital currency issued by the central bank as digital RMB cash, we can understand the concept of digital currency very well
Mu Changchun once described such a use scenario: as long as you and I have DC / EP digital wallets on mobile phones, we don't even need the network. As long as the mobile phone has electricity and two mobile phones touch each other, we can transfer the digital currency in one person's digital wallet to another person. Digital money does not need to bind any bank account when it is paid, unlike WeChat and Alipay bank. p>
fan Yifei, vice governor of the central bank, said that the central bank's digital currency focuses on replacing M0 (i.e. banknotes and coins), and maintains the properties and main features of cash, which meets the needs of portability and anonymity, and will be the best tool to replace cash
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extended materials
Digital RMB will be carried out in Beijing, Tianjin and Hebei and other places
the notice on printing and distributing the overall plan for comprehensively deepening the innovation and development of service trade was released on the official website of the Ministry of Commerce on the 14th, which announced the pilot areas of digital RMB
the reporter noted that Article 93 "comprehensively deepen the pilot tasks, specific measures and division of responsibilities for innovative development of trade in services" proposes to carry out digital RMB pilot projects in Beijing Tianjin Hebei, Yangtze River Delta, Guangdong, Hong Kong, Macao and other pilot areas in central and Western China
according to the notice, the people's Bank of China has formulated policy safeguard measures; First, Shenzhen, Cheng, Suzhou, xiong'an new area and other relevant departments of the future Winter Olympic Games scene will assist in the promotion, and then expand to other regions as appropriate
the pilot areas for comprehensive deepening are Beijing, Tianjin, Shanghai, Chongqing (21 municipal districts including Fuling District), Hainan, Dalian, Xiamen, Qing, Shenzhen, Shijiazhuang, Changchun, Harbin, Nanjing, Hangzhou, Hefei, Jinan, Wuhan, Guangzhou, Cheng, Guiyang, Kunming, Xi'an, Urumqi, Suzhou, Weihai, xiong'an New District of Hebei, Gui'an New District of Guizhou Shaanxi Xixian new area and other 28 provinces and cities (regions)
generally speaking, it is a local area network. Internet cafes, campus networks and office networks all belong to this category. In addition, fiber to the building, community broadband, ecation network, cable modem Internet, although the geographical scope is relatively large, but in essence, it is still based on Ethernet technology, so it still belongs to the intranet< How to judge whether I am an intranet or not
you can ask your ISP to see if you are one of the above users. If you dial up every time you surf the Internet, you are not an intranet user. But the situation is not absolute! A more reliable method is to judge by IP address
open the command prompt window (start → run Win9x, enter command.com Win2K, XP, enter cmd.exe), and enter ipconfig at the DOS prompt
the IP address of the machine is displayed in the IP address item
when the IP address is one of the following three forms, you are in the intranet:
10.0.0-10.255.255
172.16.0.0-172.31.255.255
192.168.0.0-192.168.255.255
if you have multiple network connections, as long as one IP does not match one of the above three forms, then you are not in the intranet
Third, I am an intranet, how to improve the speed of BT download
first of all, it is recommended that you upgrade your system to XP. This is because the total bandwidth of the intranet is limited. When the bandwidth is tight, users using Win2K and XP have an advantage over users using Win9x. Secondly, most of BT software consumes system resources. Under Win9x, it is very easy to cause the system to slow down, lose response and even blue screen, while XP based on NT kernel is much better than Win9x in resource management and stability
client software I strongly recommend BitComet
BitComet is a P2P free software based on BitTorrent protocol; Efficient network kernel, multi task download at the same time, still keep little CPU memory occupation; It supports selective downloading of files in a torrent; Disk cache technology can effectively rece the damage of high-speed random read and write to the hard disk; Only one monitoring port is needed to meet all download needs; Automatically save the download status, no need to scan the file again, no need to scan the file for seed; Support multi tracker protocol; Green software, do not need to install, only run-time Association. Torrent file; Multi language interface. Its original name was simplebt. It also supports UPnP automatic port mapping, automatic opening of windows network sharing and firewall port
Run BitComet after installation to open the options dialog box. In the advanced settings item, make sure to select "support tracker's intranet report extension", in the network connection item, select all the options, and in the disk cache item, increase the cache value according to your memory (so as to avoid premature warping of your hard disk)< 4. I've done what I said before. Why not I can't upgrade to XP for some reason)
then you need to do port mapping. If you surf the Internet through proxy server, you can use portmap to do port mapping on the server. Please click here to download portmap
if you use a router, the setting method of each router may be different. So please read the router manual or consult the dealer
this operation enables all kinds of services on LAN to be accessed by Internet
software mapping
winrote Pro is a proxy server software that integrates router, DHCP server, DNS server, NAT and firewall. At the same time, it is also a mail server software that can be applied in LAN. Therefore, it can not only realize that all microcomputers in LAN share an Internet connection (connection mode includes modem, ISDN, xDSL, DDN It can also realize the mail management in LAN and the mail exchange between LAN and Internet
winroute software is very simple to install and use. It only needs to be installed on the server. It is an excellent proxy server software for LAN sharing Internet connection. It can realize reverse proxy function by port mapping, and let the external access some services provided by the internal network protected by Nat
porttunnel means "port channel" in Chinese. Its function is to specify a channel on the server for the client's computer, so that the client can directly establish a connection with the Internet. It must run on the server side to achieve the purpose of port mapping<
port mapping of ADSL
some adsls have built-in proxy function, which enables us to realize multi machine sharing and Internet access without the need of host computer, but it is impossible to access web, FTP and other services from outside network. Next, we use omni-directional ADSL 1680 to realize the service of accessing intranet web service from outside network
access IP address: 10.0.0.2 (this is the default intranet IP address of 1680), the default user name is "admin", and the default password is "qxcommsupport"
click "virtual service" to enter the main interface of port mapping configuration
fill in the "public network port" with the port 80 that we want to open on the Internet, and fill in the "Intranet port" with the port 80 that has been opened on the intranet machine
select whether "port type" is TCP protocol or UDP protocol (for example, TCP is used for web and FTP protocol, and UDP is used for QQ protocol)
finally, add the IP address of the intranet open web service to the "host IP"
broadband router port mapping
Enter "192.168.0.1" (assuming that the IP is a router) in the IE address bar to log in to the router
enter the initial password
click "virtual server / DMZ" to enter the configuration main interface of port mapping
if you want to add a web server, check "HTTP (port 80)" and fill in the last digit of the IP address of the intranet host, enter the port number 80 in "(Port No.)" and click the "save" button below to add a port successfully
in fact, the use of winroute, porttunnel, ADSL and broadband router is very simple. We only need to add different IP addresses and ports to realize various services. Making good use of the mapping function of software and hardware will bring infinite convenience to our application on the network
intranet is the opposite of public network
digital currency has the main characteristics of network packets. This kind of data packet is composed of data code and identification code. The data code is the content we need to transmit, while the identification code indicates where the data packet comes from and goes
based on the characteristics of digital currency, the direct benefit of digital currency to the central bank is not only to save the cost of note issuance, circulation and settlement, but also to enhance the central bank's ability to control funds. Compared with paper money, digital currency has the advantages of lower issuing cost, lower transaction cost, traceable, and higher counterfeiting cost. Therefore, digital currency is a trend in the future
in China, some well-known application-oriented digital currencies have emerged, such as Puyin, which is very interesting and known as a standard digital currency.
the current network transmission of digital RMB system (DC / EP) information is the testing content in the process of technology research and development, but it does not mean that the digital RMB is officially launched. At the current stage, the internal closed pilot test will be concted in Shenzhen, Suzhou, xiong'an, Cheng and the future Winter Olympic Games
digital currency based on blockchain has al characteristics. On the one hand, it can replace the existing inefficient cross-border payment and settlement system and promote the development of trade; On the other hand, because of its decentralized, autonomous and anonymous nature, it is easy to cause economic fluctuations and encourage criminal activities
the Xueshuo innovation blockchain Technology Workstation of Lianqiao ecation online is the only approved "blockchain Technology Specialty" pilot workstation of "smart learning workshop 2020 Xueshuo innovation workstation" launched by the school planning, construction and development center of the Ministry of ecation of China. Based on providing diversified growth paths for students, the professional station promotes the reform of the training mode of the combination of professional degree research, proction, learning and research, and constructs the applied and compound talent training system.