Btc-e bitcoin stolen

1. Mt. GOx, the operator of the world's largest bitcoin exchange, announced on February 28 that 850000 bitcoins on its trading platform had been stolen. This news is undoubtedly a big bomb for many investors. At a news conference yesterday, Mt. GOx executives acknowledged the shocking fact and revealed some details<

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.

2. I met a hacker
there is no way to find out the theft, just like where the blackmail virus is and who blackmailed it is still a mystery
the nature of bitcoin is that it cannot solve cases
bitcoin (bitcoin: bitcoin) was originally a kind of network virtual currency, which can buy real-life goods. It is characterized by decentralization, anonymity, and can only be used in the digital world. It does not belong to any country or financial institution, and is not subject to geographical restrictions. It can be exchanged anywhere in the world. Therefore, it is used as a money laundering tool by some criminals.

3. Bitcoin is at risk of being stolen, and once it is stolen, it is hard to find it back. Keeping your wallet password is the key.

4.

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

5. No, there are several reasons why bitcoin was stolen
1. A stolen bitcoin can't be retrieved, and if it's lost, it's lost.
2. Bitcoin has transaction records, but the address is hidden, and you can't find an indivial.
3. Every bitcoin has a key, and only if you have this key can you be admitted to own bitcoin. However, if bitcoin is stolen or lost, your bitcoin will disappear completely
therefore, the theft of bitcoin does not belong to cracking, it may be e to internal personnel.

6.

Bitcoin is a kind of virtual commodity. In recent years, the price of bitcoin has been soaring. Recently, after more than three months of investigation, the Public Security Bureau of Zhongyuan Oilfield in Henan Province successfully cracked the first case of bitcoin theft in China

on July 27 this year, the Public Security Bureau of Zhongyuan Oilfield in Henan Province received an alarm from Wu, a resident under his jurisdiction, saying that he had lost more than 3.4 million yuan worth of bitcoin in his Internet wallet. Wu is a professional investor and has been investing in bitcoin since 2016. In early 2017, he was drawn into a wechat group of bitcoin investors

the victim Wu: at the end of the day, he said he was also responsible. Although he said that he taught me to lose my coin, he was also kind-hearted. He said that he would compensate me for 10 (bitcoin), saying that he could only bear his part of the responsibility. Later, he used Alipay to transfer money to me. If it had nothing to do with him, how could he casually accompany others for more than 100000, not a small number

after cracking the password stealing software, the police arrested the suspect

after preliminary investigation, the police determined that Dai, the leader of wechat group, was suspected of committing a major crime. On August 9 this year, the police controlled Dai in Shanghai. In Dai's home, the police found 27 bank cards and multiple computers. In one computer, as like as two peas, the police found a net wallet software that was exactly the same as the victim's use. p>

it turns out that Dai is proficient in software programming. After cracking the downloaded genuine wallet software, he adds a program to transmit user name and password to steal bitcoin. Once someone deposits bitcoin in the E-wallet, he will know the other party's account name and password, and transfer bitcoin in the E-wallet. He distributed the stolen bitcoin in hundreds of network wallets, transferred it back and forth, and sold it at a low price on the trading platform after confirming its security. In this way, Dai has committed three crimes involving more than 20 million yuan. At present, the police have found out Dai's account and frozen it, recovering more than 2 million yuan of stolen money

according to the police, bitcoin is a virtual commodity, which is difficult to be recovered once there is a problem in the transaction

Su Haizhou, leader of Criminal Investigation Detachment of Henan Zhongyuan Oilfield Public Security Bureau: bitcoin trading platform our country has closed all three platforms before the end of October 2017. At present, the country only recognizes bitcoin as a virtual commodity, not as a virtual currency. So you need to be careful if you want to invest in bitcoin

7. Continue to wait for confirmation, but bitcoin can't reverse trade, it can only do so. Bitcoin receives payments almost instantaneously. However, there is an average delay of 10 minutes before the network starts adding your transaction to a block to confirm the transaction and that you can use the received bitcoin. Confirmation means that there is a consensus on the Internet that the bitcoin you receive is not used to pay others, so it is recognized as your property. Once your transaction is included in one block, all subsequent blocks will include it, which will greatly consolidate this consensus and rece the risk of transaction cancellation. Each user can determine the time when the transaction is confirmed, but generally speaking, receiving six confirmations is as safe as waiting six months after a credit card transaction.

8. Bitcoin is an electronic currency proced by open source P2P software. Digital currency is a kind of network virtual currency. Bitcoin is also paraphrased as "bitcoin."
bitcoin does not rely on specific currency institutions to issue. It is generated through a large number of calculations of specific algorithms. Bitcoin economy uses a distributed database composed of many nodes in the whole P2P network to confirm and record all transactions. The decentralized nature and algorithm of P2P can ensure that it is impossible to artificially manipulate the value of bitcoin through mass proction
bitcoin is very similar to cash
the advantages of bitcoin are: no freezing, no tracking, no taxes, and extremely low transaction costs. Compared with people who speculate in currency, it is wealth, and people outside the currency circle may think it is a fraud
depending on which trading platform, each trading platform is definitely different.

9.

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 />

10. At present, the Chinese mainland bank of China has banned China's banks and payment systems from developing bitcoin business.
according to the people's Bank of China, bitcoin has no legal status as a currency, but it is still allowed to be traded privately at its own risk. The notice stipulates that financial and Payment institutions are not allowed to carry out bitcoin business, but it does not prohibit private transactions in bitcoin. The notice requires bitcoin website to be managed by real name system, put bitcoin website on record, and bring bitcoin service organization into anti money laundering supervision
however, according to the international market, on November 9, 2016, 1 bitcoin (BTC) = RMB 4774.40.