Bitcoin trading platform hacked

1. In June 2011, Symantec issued a warning that botnets are participating in bitcoin; mining & quot; In the middle. This can take up the computing power of the victim's computer, consume extra power, and cause the temperature of the host to rise. Later that month, ABC found an employee using the company's server to mine
some malware also make great use of the parallel computing power of graphics cards. In August 2011, botnet of bitcoin mining was discovered, and Mac OS X infected by Trojan horse was also discovered to mine bitcoin.
on June 19, 2011, security vulnerability of mt.gox (Magic: abbreviation of the gathering online exchange) bitcoin trading center caused the price of 1 bitcoin to drop to 1 cent (although other transactions were not affected). The reason is that a hacker stole the user's mtgox certificate from the computer infected with the Trojan horse, so he transferred bitcoin to his own account and sold it, resulting in a large number of "ask" requests at that price. A few minutes later, mtgox shut down and cancelled the abnormal transactions in the hacking incident, making the price of bitcoin rebound back to $15. In the end, the bitcoin exchange rate went back to what it was before the crash. Accounts equivalent to more than $8750000 were affected
in July 2011, the operator of bitomat, the world's third largest bitcoin trading center, announced the loss of access rights to the wallet.dat file that records 17000 bitcoins (about 220000 US dollars). At the same time, announced the decision to sell services to make up for the loss of users
in August 2011, mybitcoin, one of the processing centers of common bitcoin transactions, announced that it had been attacked by hackers and shut down. Involving 49% of customers' deposits, more than 78000 bitcoins (then equivalent to about $800000) are missing
in early August 2012, bitconica was sued in the San Francisco court for damages of about $460000. In 2012, bitconica was attacked twice by hackers, accused of ignoring the security of customers' funds and forging withdrawal applications
in late August 2012, bitcoin savings and trust was shut down by its owner, leaving about US $5.6 million in debt. At the same time, he was accused of operating the Ponzi scheme. In September 2012, the securities and Exchange Commission began to investigate the case
in September 2012, bitfloor trading center was also hacked, and 24000 bitcoins (about US $250000) were stolen. Bitfloor was suspended. Bitfloor resumed operations in the same month, and its founder said he had reported the theft to the FBI and that he was planning to compensate the victims, but the compensation schele was unclear
in June 2011, a hacker transferred 25000 bitcoins into his account, which is equivalent to 500000 US dollars. The whole transaction could not be traced. Although the owner of bitcoin announced the theft on the Internet, it was useless. The hacker became the first thief of bitcoin
in 2012, 46703 bitcoin worth US $228845 was stolen e to the disclosure of the super management password of the server of the website hosting provider linode. More than 43000 stolen bitcoins belong to bitcoinica, a bitcoin trading platform. Another 3094 bitcoins are owned by Marek palatinus, a Czech programmer. Gavin Andersen, the chief bitcoin programmer, also lost his five bitcoins.

2.

Invisible bitcoin can not only make people rich or poor overnight, but also bring people worry about their lives

According to Ukrainian media reports quoted by the daily telegraph, on Tuesday (December 26), Pavel Lerner, CEO of the British bitcoin exchange exmo, was kidnapped after leaving his office in Kiev, Ukraine, and dragged into a black galloping car by a group of masked people

after the above news came out, a spokesperson of exmo told the daily telegraph that we are doing our best to speed up the search for Lerner and welcome all clues from the outside world. Exmo's business is running as usual and all users' funds are absolutely safe. According to the company's official website, the platform has more than 900000 users

after the kidnapping incident attracted public attention, exmo also announced on official twitter on Thursday that it had been attacked by DDoS (distributed denial of service) with the intention of destroying platform transactions

according to Wall Street reports, at the beginning of this month, when bitcoin rose to more than US $13000, the payment system of nice hash, the world's largest digital currency mining platform, was hacked and bitcoin in users' wallets was stolen. Bitcoin millionaire, a bitcoin information website, has since estimated that as many as 4736 bitcoins were stolen by hackers, with a total value of more than $62 million

interestingly, as a foreign netizen imagined, after the kidnappers received the ransom, if bitcoin continued to appreciate, it would be OK. If bitcoin collapsed before the gloves turned, wouldn't it be a "huge loss"

In fact, this is also the old question in the minds of many investors - how long can bitcoin's investment boom last

On December 2, when talking about bitcoin in public activities, pan Gongsheng, vice governor of the people's Bank of China, said that it was a decisive and correct decision for regulators to shut down bitcoin trading platform and stop ICO a few months ago

According to BBC news, on December 14, Andrew Bailey, CEO of the financial conct authority (FCA), the UK's top regulator, issued a warning to investors, saying that bitcoin buyers should be ready for "full compensation". Bitcoin lacks the endorsement and support of the government and the central bank, and its risk level is the same as gambling, he said

on Thursday (December 28), the South Korean government announced the countermeasures to combat virtual currency speculation, and considered closing some virtual currency transactions, so as to curb excessive speculation. In addition, the South Korean government has decided to implement the real name system of virtual currency trading and expand the investigation authority of the Fair Trade Commission, the anti-monopoly law enforcement agency

In a statement, the South Korean government said that cryptocurrency speculation in South Korea has gone too far and has become irrational, according to the report. The government can no longer allow abnormal speculation to develop

the Indian authorities also issued a warning. On Friday, India's finance ministry warned investors about the risks of cryptocurrencies such as bitcoin, saying digital currency investments look like a Ponzi scheme, Reuters reported. In a statement, India's Ministry of Finance said investors and other participants in digital currency transactions were "entirely at their own risk" and advised that it was best to avoid such investments

but from the perspective of optimists, bitcoin is not as static as gold. As a virtual currency, its software code is constantly developing, and its functions can be constantly adjusted, improved and updated, and its value can be realized in unimaginable ways, such as, Many bitcoin fans are looking forward to bitcoin's "lightning network" (an improved way to facilitate payment). If bitcoin gets more attractive functions in the process of continuous evolution, people can even use it for convenient and fast cross-border payment

according to China Securities Journal, based on the sustainability of bitcoin development, bitcoin supporters believe that even if the market value of cryptocurrency expands to 20 times the current value, the market will not go crazy. However, as far as bitcoin itself is concerned, with more and more new technologies coming out, bitcoin's share in the cryptocurrency market will show a downward trend in the future

Hong shuning, a senior researcher of Suning Institute of financial research, recently wrote an article, imagining two situations of "truly killing bitcoin":

first, all bitcoin development teams are conservative and complacent, no longer absorbing the latest scientific and technological achievements to improve themselves, resulting in the emergence of a new digital currency with all aspects of technical indicators exceeding bitcoin, It is widely accepted by the society and then replaces bitcoin. This is the failure of bitcoin, but also the success of virtual digital currency

Second, there are serious loopholes in the bitcoin protocol or wallet software, which lead to the security of the whole bitcoin system can not be guaranteed, a large area of funds are stolen, sold at a low price and uncontrollable in the short term, and the social confidence in bitcoin is completely lost

so. In this world, money is easy to use

3.

at present, the vast majority of digital currency transactions are concted in exchanges. Among the numerous exchanges, bitfinex, binance, okex and so on are well-known

However, bitcoin and other digital currencies, as decentralized assets, have to be traded in a centralized exchange, which seems to have hidden contradictions and dangers

1. Problems and challenges of stock exchanges=“ //www.yuanxue365.com/en/img_fd039245d688d43fdf16c83b761ed21b0ff43bbf ">

in February 2014, Mt. GOx, the world's largest bitcoin exchange at that time, was stolen 850000 bitcoins, and the price of bitcoin suffered a" cliff "crash on that day. Later, it was revealed that Mt. GOx was in fact a thief, and only 7000 bitcoins were actually stolen

in August 2016, bitfinex, the largest U.S. dollar bitcoin trading platform, suffered a security vulnerability, resulting in the theft of 120000 bitcoins, which was worth $65 million at that time. If converted into the price in December 2017, it would be worth nearly $2 billion

on December 19, 2017, South Korea's youbit exchange was attacked by hackers and lost 4000 bitcoins, and the exchange declared bankruptcy

on December 21, 2017, the Ukrainian liqui exchange was stolen 60000 bitcoins, and the unit price of bitcoin plummeted by US $2000

in 2018, such a drama will only continue

in addition to the threat of hackers, traditional exchanges also have some inherent shortcomings, such as lack of supervision and inefficiency. The security of the exchange for investors can only rely on its own credit, and the cost of running is very low. The stock exchange is regulated at the national level, but there is no such sword of Damocles on the top of the digital currency exchange. Moreover, in an exchange, the same order can only be submitted to one exchange. After the user places an order, the funds used for the transaction will be frozen and can only wait for the completion or cancellation of the transaction. These are undoubtedly inefficient

All in all, the problems of exchanges are the problems of centralization

2. Decentralization of exchanges=“ //www.yuanxue365.com/en/img_86d6277f9e2f070889a173c9e224b899a801f257 ">

(1) the progress of the exchange itself

the upgrade of security means is various. At present, the best use is cold wallet, that is, to keep the digital currency in the offline U disk. At the end of 2017, when the YouTube exchange was attacked, 75% of its assets were withdrawn into the cold purse in time to avoid greater losses. However, it seems to be a helpless way to protect the online assets by offline means. Of course, there should be many other methods, which will not be repeated here

(2) the representative of cross ledger transaction is ripple network, and the operating company is ripple labs, which is a semi centralized system. Ripple is a decentralized clearing agreement. In order to solve the high cost and delay of inter-bank clearing, its base currency is XRP. Ripple network can connect all kinds of assets, such as US dollar, RMB, Japanese yen, bitcoin, etc. to its own network. In this system, U.S. dollars or bitcoin can be converted into reborn currency, and then reborn currency can circulate freely in the network, just as a highway is built between various assets. Due to the support of major banking institutions, the reborn currency achieved nearly 300 times growth in 2017

(3) decentralized exchange

some teams try to use blockchain technology to build a decentralized exchange. This kind of decentralized exchange, to some extent, is an extension of cross ledger trading

bitshares is the most representative of early rising projects. It builds a blockchain development platform with servers scattered all over the world. Even if some of them are attacked, the system will not collapse. Anyone can transfer money and borrow money freely on this platform, and can also quickly build a centralized exchange based on this platform. In order to ensure stable value, bitstocks also require three times of digital assets as collateral. At present, bitstocks are running fairly well

later, with the development of Ethereum and smart contract, the x x protocol came into being. This is an open protocol running in the Ethereum blockchain and a decentralized exchange in the Ethereum ecosystem. The agreement has attracted many investors. At present, it has completed financing and started to build open source software tools and infrastructure. Of course, there are many competitors. Ether Delta, IDEX and oasis DEX are trying to provide similar functions. Moreover, it is a smart contract system based on Ethereum, which only supports erc20 token. If other smart contract public chains start to rise, the demand will be reced

in addition, there are some teams that are entering, such as the domestic road seal agreement, looping (LRC) in English. They adopted a design similar to the X protocol, and also introced a fast payment function similar to the lightning network. It is characterized by trying to match multiple exchanges, the user's order can be broadcast to multiple exchanges, and completed by different exchanges. Moreover, the user can still use the account funds after placing an order, and the user's behavior of transferring part or all of the funds is equivalent to partial or total cancellation. To some extent, it improves the breadth and timeliness of the transaction. However, this system seems to have damaged the "power" of the existing exchanges. Whether we can persuade everyone to play together will be a difficult problem

At present, there is still a long way to go for the construction of decentralized exchange. In 3-5 years, traditional exchange will still be the main battlefield of digital currency

However, in the future, it is worth looking forward to let the decentralized digital currency get rid of the shackles of centralization

4. Hyundai or Lingong is OK. Lingong is a Volvo company. Hyundai is Cummins engine, and its cost performance is better than that of Hyundai.

5. At present, there is an unpopular way to use bug to get your character into the wall, so that you won't be attacked by monsters, but you can't get out. If you insist on going to three-layer mining, the best way is to form a team to go down mining together

6. 100m bandwidth has little to do with the connected computer
because the connected computers are controlled by the policy settings of the router
the most important thing is to allocate your bandwidth reasonably. In theory, if you download resources from a computer in your network segment, if your router does not allocate bandwidth, it may cause the computers in the whole network segment to get stuck on the Internet
if the distribution is reasonable and the router is powerful, then 200 computers can be easily handled.

7.

As far as I know, there are probably two ways to obtain bitcoin. One is to use assets such as cash to trade with other bitcoin users. Generally speaking, the value of assets is determined according to the market value of bitcoin. However, the market value of bitcoin fluctuates a lot, and there may be hackers on the trading platform, so there may be some risks in this way

So if you want to get bitcoin by mining, you need a computer with high performance and a lot of manpower to maintain it. All in all, acquiring bitcoin is an investment and needs to be managed reasonably< br />

8.

According to a foreign media report on December 13, Beijing time, the world's largest bitcoin trading market, headquartered in Hong Kong,

"these bitcoin trading markets cross national boundaries, and there may be major transactions on systems and platforms outside the United States." "Without your knowledge, your investment funds may soon flow overseas," sec chairman Clayton said on Monday. As a result, this risk may be magnified, including that market regulators, such as the SEC, may not be able to effectively track down these bad actors or recover funds. "

this warning has at least been reflected to a certain extent in the bitcoin futures market. On Tuesday, the trading volume of bitcoin futures contract on CBOE futures exchange fell sharply, which is the second day of listing of the futures

9. Investors think that there is operational risk,
once the website collapses,
the virtual goods they hold are facing the dilemma of being unable to trade,
is equivalent to nothing.

10. Digital currency
the security of an exchange depends on whether it can withdraw money. I usually use ngoex. This exchange connects with a third-party wallet and can carry money to its own wallet. Many so-called exchanges can't withdraw money, which is very dangerous.