Bitcoin variants

1. The abbreviation of bitcoin is BTC, and the symbol is "&3647;", The concept of bitcoin was first proposed by Nakamoto on November 1, 2008, and was officially born on January 3, 2009
unlike all currencies, bitcoin is not issued by a specific monetary institution. It is generated by calculation based on a specific algorithm
bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions
the total number of bitcoins is limited
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2. On the evening of May 12, wannacry blackmail virus spread in many countries around the world. The network of many domestic colleges and universities was attacked by blackmail virus. A large number of students' Graation Theses and other important information were encrypted by the virus, which can only be recovered by paying ransom< Br > yesterday, a reporter from Beijing Youth Daily learned that the virus affected not only the campus network, but also some enterprises and institutions< According to a staff member of Zhengzhou branch of China Unicom, on May 14, e to the influence of bitcoin blackmail virus, all the unit computers were paralyzed< On May 13, the entry-exit Office of Xiangshui Public Security Bureau announced that e to the new virus attack on the public security network, the entry-exit business was temporarily suspended, and the specific recovery time was waiting for notice< Br > "after a night, the data didn't recover." Yesterday, a police officer in Shandong told the Beiqing daily that the computer stored in the unit was locked e to the influence of blackmail virus, and he could only do nothing to learn computer science< < br > some gas stations of PetroChina are affected < br > the gas stations of PetroChina are also affected. Yesterday, PetroChina announced in its official website that at about 22:30 on May 12, e to the global outbreak of bitcoin blackmail virus, the normal operation of some gas stations of PetroChina was affected. The virus causes the network payment functions of gas station, such as gas card, bank card and third-party payment, cannot be used. However, the operation of basic businesses such as refueling and sales is normal, and the capital security of the refueling card account is not affected< Br > yesterday afternoon, a reporter from Beijing Youth Daily contacted five PetroChina gas stations in Beijing< Among them, the staff of PetroChina Shouqi No.12 gas station said that since the 13th, e to the influence of the new virus, the mobile payment, gas card payment and other payment methods of the gas station have been affected. Although the emergency repair was carried out in the morning, the network is still unstable. The staff of PetroChina Guomen gas station told Beijing Youth Daily that as of 4 p.m., Guomen gas station still only accepted cash payment or gas card payment< PetroChina said yesterday afternoon that according to the technical solutions verified on site, it began to implement the recovery work station by station. More than 80% of gas stations have recovered their network connection, and the gas stations infected by the virus are graally recovering the functions of gas cards, bank cards and third-party payment< The staff of PetroChina Dahu villa southwest, PetroChina Dongpeng gas station and PetroChina Jingshun gas station told the Beijing Youth Daily that the functions of mobile payment and gas card payment had been restored before noon< At one time, the spread of the virus was stopped by accident< Br > a 22-year-old British network engineer noticed on the evening of the 12th that the blackmail virus was constantly trying to enter an extremely special and non-existent website, so he paid 8.5 pounds (about 75 yuan) to register the domain name, trying to obtain data about the blackmail virus through this website, British media reported on the 13th< It is incredible that the further spread of blackmail virus in the world has been stopped since then< According to the analysis of the engineer and colleagues, this strange website is likely to be a "checkpoint" set by the blackmail virus developer to avoid being captured by the network security personnel, and the behavior of registering the website inadvertently triggered the "suicide switch" of the program< Br > in other words, the blackmail virus must visit the non-existent website before each attack. If the website does not exist, it means that the blackmail virus has not attracted the attention of the security personnel and can continue to move freely on the network; Once the web address exists, it means that the virus may be intercepted and analyzed< Br > in this case, in order to avoid getting more data from network security personnel or even controlling it in turn, the blackmail virus will stop spreading< < br > new varieties of blackmail virus have appeared < br > British network engineers and some network security experts who accidentally blocked the blackmail virus said that this method only temporarily prevented the further attack and spread of the blackmail virus, but it can not help the users who have suffered from the blackmail virus, and it is not a complete solution to the blackmail virus< They speculate that the new version of blackmail virus is likely to make a comeback without this "suicide switch". This kind of speculation really soon became a reality< Br > yesterday, the national network and information security information notification Center issued an emergency report: monitoring found that a variant of wannacry blackmail virus, wannacry 2.0, broke out all over the world. Different from the previous version, this variant can not close the spread of the variant by registering a domain name, and the spread speed of this variant may be faster< Br > the Information Office of Beijing Municipal Party committee, Beijing Municipal Public Security Bureau and Beijing Municipal Commission of economy and information technology also jointly issued the notice on the emergence of variants of wannacry blackmail worm and suggestions on its disposal< Br > the notice requires all units to immediately organize intranet detection. Once poisoned machines are found, they should be immediately disconnected from the network. It is strictly prohibited to use U-disk, mobile hard disk and other devices that can carry out ferry attacks "Notice" said that at present it appears that the hard disk format can clear the virus< Br>, the suspect hitherto, the European Cyber Crime Center affiliated to the European Union's Interpol 13 said that the scale of the extortion virus attack hitherto unknown, and that it is necessary to find suspects through complex international investigations. The European Union Interpol has been working with many countries to investigate the attack.

3. 1. Compared with the total number of bitcoin of 21 million, the total number of chain gram is 1.5 billion, of which 1.2 billion is obtained by playing cloud shared storage and broadband, and 300 million is obtained by participating in thunderbolt activities
2. Bitcoin was proposed at the time of the financial crisis in 2008. It was born in 2009, and it has been hard to get one currency so far. However, chaink was born in 17 years when Xunlei's stock price was low and blockchain technology was mature, and it is not hard to get one currency
3. Bitcoin adopts the public chain in the blockchain, which is easy to be used for criminal purposes, while chainmaker adopts the alliance chain in the blockchain, which belongs to the private chain and can be real name, which is concive to enterprise management and has high innovation significance
4. Bitcoin was worthless when the computer graphics card could be directly g out, and it was a proct that consumed energy completely. Now, it is worth 130000 yuan by speculators, and the chain gram is guaranteed by thunderbolt. It makes use of idle resources, and can make immeasurable sharing for the earth's green energy plan, and can exchange thunderbolt goods, Although the price has gone from 50 cents to 3 yuan, then to 10 yuan, then to 6 yuan, and now to 4 yuan, it has experienced wave after wave of roller coaster, but the prospect is immeasurable. It can be said that link is an improved version of bitcoin. Just like Watt's improved steam engine, when people begin to realize that bitcoin is a waste of resources, link will be the most historic currency
this is written by a post in the player cloud forum, and I just saw this problem, so I'll it to you.

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Tencent computer housekeeper has developed into an all-round system security assistant tool, easy to use and free of charge, Absolutely can be called a rare security software

5. Try to protect Tencent's computer housekeeper by launching a 2-in-1 anti-virus version with a "4 + 1" engine architecture. On the basis of the "housekeeper anti-virus engine, Jinshan cloud search engine, xiaohongsan local search engine, and guanjiayun engine" four core search engine, the housekeeper system repair engine is enabled, and the construction of the "cloud security" platform and the research and development ability of the self-developed engine are strengthened, The anti-virus effect is better.

6. Petya blackmail virus does great harm to the computer, so don't think about other things. Prevent it first
it's better to install a computer manager on the computer and fix the system patch in time
in addition, don't open unknown attachments, especially files in RTF, DOC and other formats.

7. Hello, in this case, I suggest that you install the latest 360 security guard, and open it to prevent blackmail virus.

8. When the sky falls down, there is a high roof. First, back up the files. After the mutation, there will be a network security company to research and develop the method

9. Close port 445, install the released system patch in time, and then install the protection software

Windows users can completely eliminate wanacry blackmail virus on devices by formatting all hard disks
indivial users can contact security manufacturers at home and abroad, such as Qihoo 360, Jinshan drug tyrant, Kaspersky, mcfel, Tencent security manager and other security centers for assistance in recovering important data
use "blackmail virus immune tool" to repair. Users download the offline version of Tencent computer manager "blackmail virus immunity tool" through other computers, and the files to a safe and non-toxic U disk; Then turn on the designated computer when WiFi is turned off, the network cable is unplugged and the network is disconnected, and back up important files as soon as possible; Then use the offline version of "blackmail virus immunity tool" to fix the vulnerability with one click through USB flash disk; Network can be normal use of the computer
use the file recovery tool to recover. Users who have been infected with the virus can use the computer manager - file recovery tool for file recovery, with a certain probability of recovering your documents
note: we will continue to pay attention to the handling methods of relevant security manufacturers, waiting for more superior perfect unlocking.