What are the main robberies suffered by criptomoedas exchanges?
Hacker attacks on criptomoedas exchanges are more common than we would like. Robberies can range from a few billion to billions of dollars, hurting not only businesses, but also their customers and investors.
Those responsible for the exchanges should stick to the flaws their systems may have that would facilitate the theft of their cryptoactive. Some cases have become emblematic and traumatizing to the world of digital coins, such as Mt. Gox.
Earlier this week, the Japanese exchange Zaif confirmed the theft of the equivalent of $ 246 million of its assets, causing serious problems for its customers.
The Bitcoin Portal has organized the list of the ten biggest robberies to exchanges of all time in loss value.
At the end of January 2018, the Japanese exchange Coincheck suffered the largest loss of criptomoeda in history, in value. At a news conference, the company's chief of operations confirmed the theft of 500 million NEM token, which at the time was no less than R $ 1.6 billion.
Rumors surfaced when Coincheck's platform abruptly halted all operations. The company was also not registered with the Financial Services Agency of Japan.
2. Mt. Gox
Theft from Mt. Gox was not as big as Coincheck's, but it was certainly much more shocking and devastating. By 2014, the still incipient crypto-currency market had relatively few major exchanges. The largest of these was Mt. Gox, responsible for 70% of Bitcoin's worldwide transactions in 2013.
In the episode, 850,000 BTC were stolen, which, at the time, was worth about $ 450 million. The theft is surrounded by suspicions of fraud by Mt. Gox itself. At various times, large volumes of the stolen goods were transferred to other exchanges, causing a major imbalance in Bitcoin's value.
This is one of the more recent cases quoted earlier in the article. Zaif froze withdrawal and deposit operations since 14 September. On the 19th, the company confirmed the theft of the equivalent of $ 60 million.
5,966 bitcoin (BTC) was stolen, in addition to amounts in Bitcoin Cash (BCH) and Monacoin (MONA) of the portfolios connected to the network, the majority of customers. The company seeks to reach agreement with the Fisco Digital Asset Group to obtain 5 billion yen and return the stolen amounts to customers.
In early February 2018, the victim of the turn was BitGrail, exchange that had 17 million NANO stolen, equivalent to $ 170 million. The attack made the token lose 20% of its value in a few minutes.
The owner of BitGrail went so far as to say that he could modify the blockchain network of the criptomoeda, so that the rhombus was covered. The official positioning of the company, however, found that this would not be possible.
Bitfinex suffered Bitcoin's second-largest robbery ever. In August 2016, 120,000 BTC were stolen, equivalent to $ 72 million.
Hackers exploited a vulnerability with Bitfinex's multi-signature portfolios used to store their clients' funds. This type of portfolio has keys divided among several owners to mitigate the risk.
The criminals created a setup with another company's system, BitGo, which completed the data and made the transactions.
In June 2018, Bithumb, the sixth largest crypto currency exchange in the world, lost more than $ 30 million. The company stated that all affected customers would be covered by the reserve funds.
The robbery had an impact on the market, causing Bitcoin to fall $ 200 in value shortly after the announcement of the attack, trading at $ 6,500.
In 2017, the company suffered another hacking attack in which data of 30,000 customers were compromised.
7. Double spend
In May 2018, a hacker attacked several criptomoedas exchanges simultaneously, causing losses estimated at $ 18.6 million. He would have acquired most of Bitcoin Gold's mining capacity, allowing him to make deposits to obtain fiduciary money, and then withdraw the money back from the exchanges' portfolios.
With the tactic known as "double spending" the criminal would have received 388,200 BTG in his moves, creating new 22 blocks of the criptomoeda.
Controversies over the security of Bitcoin Gold have risen. On the day of the launch of the digital currency, another hacker was able to bring down the network.
Bitstamp officials were targeted by a malicious phishing action, receiving fake emails with the intention of obtaining secret data about the company. In January 2015, the exchange suffered a loss of 19,000 bitcoins that were currently worth $ 5.1 million.
The loss was not only greater because most of Bitstamp's crypto-coins reserves were stored in cold, disconnected portfolios of the internet.
In April 2018, Coinsecure, based in India, was stolen by one of its own employees. The employee would have had access to one of the private keys belonging to the director of the company, Amitabh Saxena, and transferred 438,318 BTC to a private portfolio.
The robbery caused a $ 3 million loss. The company has ensured, however, that the security system has not been damaged.
The last exchange attacked from the list is EtherDelta, which had its DNS server hijacked by a hacker in December 2017, taking about 308 ether, or $ 250,000.
EtherDelta is a decentralized exchange, meaning that its employees have no control over the company's funds. The criminal stole the company's depository address, and many clients transferred amounts into Ethereum for the private key stolen by the hacker.