Bitcoin Trojan horse
Yesterday, I went to the electronic reading room. Not long after I plugged in the USB flash drive, the teacher suddenly asked everyone to unplug the USB flash drive. Some students found that all the files in the USB flash drive could not be opened, and there were two more documents asking for money
so everyone rushed to check, as long as the U disk inserted in the school computer were poisoned, large-scale computer poisoning occurred in the evening
a lot of people's information and graation thesis are in the computer. I really feel that hacker's behavior is disgusting. For the sake of money, regardless of the future of students, teachers' lifelong scientific research achievements...
hope to catch criminals as soon as possible and give them severe punishment by law
this virus will scan windows devices with open 445 file sharing port. As long as the user's device is on the Internet, hackers can implant blackmail software, remote control Trojan horse, virtual currency mining machine and other malicious programs in computers and servers
some security researchers point out that this large-scale network attack seems to be deployed through a worm application, and wannacry can spread among computers. What's more terrible is that unlike most malicious programs, this program can replicate and spread on its own in the network, and most of the current viruses still need to rely on the successful users to spread by cheating them to click the attachment with the attack code
the attack has affected 99 countries and as many as 75000 computers, but because the virus uses anonymous network and bitcoin anonymous transaction to obtain ransom, it is very difficult to track and locate the originator of the virus
Trojan horse is generally defined as a person or thing that secretly causes damage to the enemy or leads to the downfall of the opponent. In today's world, bitcoin is a "Trojan horse". This kind of virtual currency manipulated by "geeks" attracts naive, innocent and ignorant investors on Wall Street by taking advantage of human greed
Peter Schiff is the CEO of europacific capital and a best-selling writer. He thinks bitcoin is the gold of fools Hugo Salinas price, a very successful Mexican businessman, encouraged the government to accept silver as legal tender. He believes that bitcoin will become a tragic history caused by large-scale speculationa former counterterrorism analyst at the CIA said that terrorists are using innovative technologies to raise funds, one of which is bitcoin. He said it was the first terrorist group to use bitcoin publicly
in general, bitcoin fanatics should follow the advice of these successful Wall Street people: no one is more blind than those who refuse to face them
no matter in any country, bitcoin does not need to be developed in a large scale, because it will affect human society< br />
stolen
mark kalpler, chief executive of mt.gox, bowed his apology at a news conference held in Tokyo yesterday, saying that "the loss of bitcoin is e to a loophole in the company's system"
a lawyer for Mt. GOx said that almost all the bitcoins traded on the platform were stolen, including about 750000 bitcoins in the user's trading account and about 100000 bitcoins in Mt. GOx's own account. According to the trading on February 28, the loss is estimated to be about $467 million
according to media reports, mt.gox trading platform had more than 1 million accounts at its peak, mainly from customers outside Japan, including many users trading more than US $10000. Some bitcoin investors have rushed to Tokyo from overseas in an attempt to recover trading funds from Mt. GOx
on February 7, e to hacker attacks, mt.gox temporarily stopped the bitcoin extraction business, causing transaction confusion and user dissatisfaction. From the noon of February 25, users cannot log in to mt.gox trading platform. The home page of the website then pasted a "notice to customers" to suspend all transactions
Li, a native of Hefei, spent 140000 yuan to buy 124 bitcoins in October this year. Afterwards, Li joined some chat groups of bitcoin players to pay close attention to the bitcoin market. On October 22, a person named Michael in the group took the initiative to chat with Li and asked him if he was mining“ I won't, and I won't get any money. " Mr. Li replied. Michael repeatedly urged Li to have a try and sent him a "mining tool", claiming that he could use the tool to dig more bitcoin. In the subsequent chat, Michael constantly reminds Li to put bitcoin in his wallet, saying that the trading website is not safe“ From time to time, there are news that trading websites are closing down and running away. What he said is quite reasonable, so I believe him. " Li told Anhui Business Daily
100 bitcoins disappeared
Li received and installed mining tools. On the evening of October 26, he was inced by Michael to put 100 bitcoins in his wallet. However, when the bitcoin in the E-wallet just reached 100, it suddenly disappeared. Li suddenly panic God, and then contact Michael, the convenience of invisible disappeared
Li told reporters that at present, a bitcoin costs about 5000 or 6000 yuan, and 100 bitcoins are worth 500000 or 600000 yuan. Afterwards, Li reported the case to the police. However, to Li's disappointment, because bitcoin is a virtual currency, there is no relevant domestic law to regulate and protect its transactions. The police did not file a case“ Now, this man named Michael is still active on the Internet. He's just taking advantage of the law. " Li told Anhui Business Daily
there is a Trojan horse in "mining tools"
How could Li's bitcoin disappear? 360 security engineer contacted him and tested Michael's "mining tool", and found that this tool is a very popular "bitcoin robber" Trojan horse this year. According to the analysis of 360 security center, most of the "bitcoin thieves" Trojans are disguised as mining tools, simplified wallets and other compressed files. Once a player is recruited, the Trojan will automatically search for bitcoin wallets and steal them through e-mail, hacker remote control and other means.
bitcoin virus (bitcoin Trojan horse) "bitcoin blackmailer" was popular abroad in 2014, and was found in China in early 15 years. This kind of Trojan will encrypt 114 kinds of files in the infected computer, such as docx, PDF, xlsx, JPG and so on, making it unable to open normally, and pop up windows to "blackmail" the victim, requiring the victim to pay 3 bitcoin as "ransom". According to the recent bitcoin price found by the reporter from the Internet, 3 bitcoin is almost 5000 yuan or 6000 yuan. This kind of Trojan horse is generally spread through English mail. The name of the Trojan horse program is usually in English, which means "order", "proct details", etc., and uses fax or form icon, which is very confusing. The recipient easily mistakenly thinks that it is a working file and clicks to run the Trojan horse program.
suppose that a supercomputer can violently try 1 billion passwords in one second by setting a password with numbers and uppercase and lowercase letters (a total of 62 characters), then:
it takes 1 second to crack 5-digit passwords (62 ^ 5 = 920 million),
it takes 62 seconds to crack 6-digit passwords,
it takes 1 hour to crack 7-digit passwords,
it takes 2.5 days to crack 8-digit passwords,
it takes half a year to crack 9-digit passwords,
it takes 100000 years to decipher 12 (more than the history of human civilization),
it takes 24.3 billion years to decipher 15 (more than the age of the universe)
the 15 bit password takes a few seconds to input more than the 5-bit password, but the decryption cost is almost impossible
even if the quantum computer can increase the cracking speed by 100 million times, it will only offset 27 bits of the 256 bit private key length of bitcoin (2 ^ 27 = 130 million). Even if extraterrestrials appear and the cracking speed is increased by 100 million times for several times in a row (each time the length of the private key is offset by 27 bits), bitcoin can simply upgrade the length of the private key to 512 bits.
Hayek studied business cycle theory and monetary theory with his teacher Mises early in his academic career. In 1931, he published "price and proction". Because the proposition in the book is contrary to Keynes's "on money" published a year ago, they launched a debate
The most typical example of
is gold and silver. For a long time, gold and silver were the common currency in the world. The hard currency of trade in all countries did not belong to any one country. Even in the era of gold standard, the state issues legal paper money, but legal paper money is still anchored by the free competition of gold. Gold circulates freely in the world and is more rigid than paper money
There are at least three reasons that lead to the existence of a large number of competitive currencies:one is the existence of multi-level market, because the metal currency is not easy to cut, super zero denomination currency and silver currency coexist
In the 18th and 19th centuries, there were long-standing high-ranking gold coins in Bangladesh, such as mulu, Sika rupee, middle akut rupee, and low ranking copper coins and BEIBI coins. Because silver coins are not easy to cut, a large number of shell coins with zero denomination are needed in remote areas and small exchangethis situation existed for a long time in ancient China, and the copper coin standard lasted for more than a thousand years in ancient China, but the iron coin also circulated for a long time (such as the Song Dynasty), and the face value of iron coin was smaller than that of copper coin. In the Qing Dynasty, with the discovery of Potosi silver mine in South America, a large number of silver coins flowed into China. Around 1730, the use of silver and money accounted for half of the transactions. Compared with copper coin, silver coin has a larger denomination, which is convenient for large transaction and solves the problem that copper coin is not easy to transport
The second is seasonal deflation, and private coins balance market demandin the agricultural era, the transaction volume of agricultural procts accounted for a large proportion, and a large amount of money was used for agricultural procts transaction. However, agricultural procts have obvious seasonality, and the transportation and supply of metal money is extremely inconvenient, so the problem of insufficient money often appears in the harvest season. In his book, Professor Kuroda cites the example of Quanzhou, Fujian Province, China in 1606. The original inventory management money could not meet the rice trade, so the private money was imported to meet the market demand to balance supply and demand. This kind of situation happens every year in China. Every year, it is the peak of money demand near the Spring Festival. The central bank will release part of liquidity to balance supply and demand
Thirdly, metal currency is a kind of deflation currency, which circulates a variety of currencies in regional and specific areas In his book, Professor Kuroda cites Nadina Jebel's case, "the transactions of grains such as rice are used for sonoto silver coins, the transactions of oils and fats are only used for French akote rupees or British akote rupees, and the transactions of flax are only used for French akote rupees." At the beginning of the 20th century, in China, all kinds of silver coins were circulated in Jiujiang, Jiangxi Province. Mexican silver coins were used for the export of tea and porcelain procts in Shanghai, and silver coins issued locally in Jiangsu Province were used for the trade of local markets such as tobacco or beans. There are also silver bills used in Shanxi business circle, and various copper coins used in the coin community around the China Sea, including Japan, North Korea, Southeast Asia and other countriesthe problems of metal currency in multi-level market, seasonal deflation, regionality and specific fields do not exist in today's credit currency era. Many of the competitive currencies listed by Professor Kuroda also disappeared in the globalization of silver coins and the legal tender system
therefore, the monetary pattern of countries in the world we see today is one country one currency, which is legally issued by the state monopoly
Zhiben society is a hard core learning society that listens to hard lessons, reads hard books and reads hard texts. Wechat search "benshe" (ID: benshe0-1) to learn more in-depth contentthis is possible, because there are often Trojan horse virus events in the bitcoin trading market recently, PayPal, a well-known mobile payment application, has opened the connection of digital currency purchase on its page, and the purchase limit has been greatly relaxed. As a result, a large number of retail investors have flocked to the bitcoin market, pushing up the price of bitcoin. Another good thing is that many fund companies have bought the assets of bitcoin as a hedge against the depreciation of the US dollar. The buying in these markets has brought about a sharp improvement in the bitcoin market. In recent transactions, bitcoin once rose to a high price of $13866, a four-year high. Especially for retail investors, the trading volume increased significantly
security experts also said that the common attack means of hackers now is to hack into the bitcoin currency trading market directly and steal a large number of bitcoin hosted by investors directly, and the characteristic of bitcoin is that it can't be monitored. Finally, the stolen bitcoin can't be recovered at all. Recently, many bitcoin trading centers have been affected by this