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Взлом биткоин Bitcoin hack: на самом деле просто? Биткоин хак

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Кражи биткоин сейчас стали обыденными и уже не вызывают такого интереса как пару лет назад. Суммы украденных биткоин уже измеряются сотнями миллионов долларов. Атакам хакеров подверглись биржи биткоин, крупные майнеры, владельцы большого количества биткоин. Не говоря уже о Интернет-сервисах, которые изначально были созданы для кражи биткоин. Другими словами, взлом биткоин — не такая уж сложная задача.

Основной причиной большого количества краж кроются в самих принципах организаций сети Bitcoin. Изначально подразумевалась полная анонимность пользователей и всех финансовых транзакций. Денежные средства биткоин похожи на наличные деньги и единственным способом вернуть украденное — найти реального похитителя и применить к нему «убедительные» методы воздействия.

Но соблазн поживиться за чужой счет хоть раз в жизни посещала каждого. Но прежде чем стать на скользкий путь желательно знать методику увода биткоин и что делать дальше?

Самое главное – доступ к ключам

Криптовалюта Bitcoin представляет собой всего лишь публичный реестр называемыйBlockchain. Реестр хранит информацию обо всех транзакциях сети и связанные с ними кошельки. Таким образом, владение биткоинами означает, что у клиента имеется только личный ключ для доступа. Хранить ключи можно в любом виде – на жестком диске или флеш-накопителе, распечатать адреса в виде QR-кодов, хранить в биткоин-банке и т.д.

Злоумышленников не интересуют кошельки, на которых хранится пара биткоинов. Им нужны Интернет-сервисы в базах данных, которых хранится большое количество ключей или биткоинов. Это биткоин-биржи, майнеры, интернет-магазины и владельцы больших сумм биткоинов.

После определения потенциальной жертвы злоумышленники пытаются получить доступ к частным ключам или базам данных ключей. Для этого применяются все методы взлома компьютерных систем – скрытая загрузка вирусов на компьютер или сервер клиента биткоин. Также используются методы добывания паролей непосредственно от клиента (методы социальной инженерии). Если доступ к ключам получен уже ничто не мешает перевести биткоин на нужные кошельки.

Заметаем следы

В Bitcoin есть особенности осложняющие жизнь хакерам. Каталог транзакций системы доступен всем пользователям сети, и можно легко увидеть все кошельки, на которые переведены украденные средства. Личность вора таким образом вычислить сложно, но и методы расследования краж не стоят на месте.

Поэтому сокрытие биткоинов не такая простая задача как кажется на первый взгляд. «Легализация» биткоинов обычно происходит через сеть специальных кошельков, называемых«mixers», в которых «черные» биткоины теряются в массе реальных платежей и в итоге получаем «чистый» адрес в системе Bitcoin, напрямую никак не связанный с биткоин-адресом потери биткоин.

Биткоины «смешиваются» в «mixers» постепенно, переводы обычно осуществляются с использованием однократных адресов. Так что когда возникнут вопросы, этих адресов уже не будет. Для дополнительной защиты переводы осуществляются через анонимную сеть TOR, что еще больше затрудняет расследование.

Наслаждаемся жизнью

Наконец-то у нас есть «чистые» биткоины и желательно много. Самое время приобрести что-нибудь исключительное – электромобиль Tesla или виллу на Средиземном море. Но пока еще большинство продавцов предпочитает биткоину обычные валюты.

Так что нужны услуги обмена биткоин. Сеть биткоин финансово пока еще не очень сильна, и желающих приобрести большое количество биткоин по текущему курсу не очень много. Крупные биткоин-транзакции уже начинают привлекать внимание правоохранительных органов, и скрывать свою личность при обмене биткоин становится все труднее. Любой обменный пункт или биржа биткоин затребуют информацию для идентификации получателя.

Здесь самое время проявить смекалку. Самый надежный способ это обменять биткоин на наличные деньги при личной встрече с покупателем. Найти такого покупателя при желании вполне возможно. Также такую услугу как личная покупка биткоин предоставляют некоторые обменные пункты в т.ч. и на территории СНГ.

Будьте терпеливы и меняйте биткоин небольшими порциями, чтобы не привлекать внимания. Хотя колебания курса биткоин не идут на пользу.

Данная статья ни в коей мере не является руководством к действию. Помните, что любое преступление всегда приводит к наказанию.

Это интересно:

Взлом биткоин (Bitcoin hack): на самом деле просто?

Bitcoin Generator Hack is now released.You can generate bitcoins to any address, instantly.The Bitcoin Generator Hack is an innovative tool which is able to extract bitcoins from multiple mining pools.

How this is possible ? As you probably know, the bitcoin has big price in the last period so a lot of people are crazy to get more and more. Because of that,have appeared lately a lot of poor mining pools with leaks and with a lot of vulnerability things. Bitcoin Generator Hack is able to connect with the mining pool databases from where will extract bitcoins every time when a new 50 BTC block is unlocked.When the process is finished you can send the amount of bitcoins to any address!

Every transaction is anonymous, the amount of bitcoins will arrive to your address in maximum 15-30 minutes.

What is bitcoin?

Bitcoin is a peer-to-peer payment network and digital currency based on an open source protocol, which makes use of a public transaction log. Bitcoin was introduced in 2009 by pseudonymous developer Satoshi Nakamoto.It is called a cryptocurrency as it uses public-key cryptography.When paying with bitcoin, there will be no exchange of digital notes or tokens between buyer and seller. Instead, the buyer requests an update to a public transaction log, the blockchain.This master list of all transactions shows who owns what bitcoins currently and in the past and is maintained by a decentralized network that verifies and timestamps payments.The operators of this network, known as “miners” like bitcoin generator, are rewarded with transaction fees and newly minted bitcoins.

Proof:

How to use Bitcoin Generator Hack :

After you downloaded the tool, double click on the icon and open the program. Write your address, because the program has to know where to send the coins. Choose the amount of bitcoins and ‘send’ to your address. It’s pretty simple actually, so enjoy using the Bitcoin Generator Hack and have fun spending the money.

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Bitcoin Generator Hack was succesfully scanned by VirusTotal.

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Bitcoin: $64m in cryptocurrency stolen in 'sophisticated .

More than $60m worth of bitcoin was stolen from one of the world's largest digital currency exchanges yesterday, and nearly 24 hours later, the event is still shrouded in mystery.

What is clear, though, is that the impact is far-reaching.

The Bitfinex theft represents the largest loss of bitcoins by an exchange since Japan's infamous Mt Gox lost 744,408 BTC in early 2014 (worth $350m), a breach that would ultimately cause it to cease operations.

At press time, the value of the 119,756 BTC stolen from Bitfinex stands at roughly $66m, or about 18% of what was lost by Mt Gox.

Given the size, the theft has sparked confusion and frustration among market traders and observers since it was announced.

Sources close to the exchange have largely avoided offering comment on whether the 119,756 BTC stolen represents the full extent of the hack, and Bitfinex itself has yet to publish any findings from its ongoing internal investigation.

Here’s what we know (and what we don’t know) so far:

What we know

Multi-signature accounts were impacted

The source of the vulnerability appears to lie in how Bitfinex structured its accounts and its use of bitcoin wallet provider BitGo as an additional layer of security on customer transactions.

Announced in 2015, Bitfinex and BitGo created a system whereby multi-signature wallets, those where keys are divided among a number of owners to manage risk, would be provided to each customer.

The exchange declared at the time:

"The era of commingling customer bitcoin and all of the associated security exposures is over."

As referenced in the quote, the companies sought to find an alternative to the standard process used by exchanges at the time that saw customer funds co-mingled in larger offline wallets and connected or "hot" wallets used to meet liquidity demands.

Rather, each Bitfinex user has their own set of keys created on the platform, using a 2-of-3 key arrangement whereby Bitfinex held two of the keys (including one offline) and BitGo used the third to co-sign transactions.

In order to withdraw such a large amount of funds, BitGo would likely have had to sign off on those transactions.

Bitfinex customer losses significant

While the full extent of customer losses on an individual basis is unclear, signs indicate a significant subset of the bitcoin trading community was impacted.

In the hours following the news, community members took to Twitter and Reddit to report that their accounts had been drained.

Some users expressed exasperation despite having security measures like two-factor authentication in place, in which secondary devices (like a mobile phone) are used to provide an additional passkey layer.

On the other hand, funds transferred to the exchange following the hack are said to be secure, but the exchange has yet to release details on both when and how withdrawals will be managed.

Bitcoin prices have fallen sharply

One of the most direct impacts of the Bitfinex hack could be seen in the price of bitcoin, which plunged after the news broke.

Prices fell by nearly 20%, tumbling as low as $480 USD before recovering.

At press time, the price of bitcoin is approximately $552, according to the CoinDesk Bitcoin USD Price Index, up roughly $70 from yesterday's low.

Bitfinex remains offline

Alos at press time, Bitfinex remains offline, with its message announcing the hack still visible to users.

Statements from Bitfines suggest that the company is looking to initially bring the site online so that users can check their balances and determine whether their accounts have been drained.

What we don’t know

Who is to blame?

Given the amount of money involved, many in the community have been searching for a scapegoat.

One obvious target has been Bitfinex itself, which had possession of two of the three private keys needed for the funds lost from multi-signature accounts. Others have questioned whether weaknesses in BitGo's model were exposed in the incident as well.

Yesterday, BitGo took to social media to state that an internal investigation had turned up no evidence of a server breach on their end.

Yet despite the assurances, some observers have blamed the service for "blindly signing" the withdrawal of nearly 120,000 BTC and wondered why no potential countermeasures were in place in the event of a movement of funds of that size.

With 30-day transaction volumes just above 600,000 BTC, the hack was roughly one-sixth of the size of the exchange's monthly orders.

When will fiat funds be accessible?

One prevailing question among customers is the status of deposits not denominated in bitcoin. Since the hack was first revealed, Bitfinex stated that only its bitcoin holdings were impacted.

More than a few customers are now taking to social media to ask when they’ll be able to access or withdraw those funds.

Answers may be coming soon, however. Representative Zane Tackett, who has been responding to queries via social media since the incident first came to light, said that more updates are forthcoming.

Were other exchanges impacted?

Other market observers were quick to speculate on whether the outage could lead to complications at other exchanges that may have been using Bitfinex as a source of liquidity.

It is known that Bitfinex did offer an API and that it was at one time used by exchanges, though the primary end markets appeared to be brokers and traders.

Such an issue was exposed by a hack at Bitstamp in early 2015, when exchanges, merchants and ATM providers connected to the exchange experienced a notable disruption.

At press time, it’s unclear if any smaller exchanges were impacted, and smaller exchanges contacted by CoinDesk reported no disruptions.

In statements to CoinDesk, however, exchanges Kraken and Bitstamp indicated that their approaches to implementing BitGo's multisig technology differed from that of Bitfinex.

"For now I can already say that Bitstamp's implementation of BitGo's MultiSig technology is fundamentally different from the one at Bitfinex," Vasja Zupan, head of business development for Bitstamp, told CoinDesk.

In an email, Kraken CEO Jesse Powell said that while he couldn't offer details on the exchange's security measures, he remarked that "we're confident in our configuration" in light of the Bitfinex breach.

Is BitGo's business model at risk?

Whether BitGo is deemed at fault, it may be losing the battle of public opinion.

Sources suggest BitGo's business model was primarily based on charging enterprise clients for services, and that bitcoin exchanges were the company's primary target market.

One major exchange representative said that the incident had raised issues with the multi-sig security model and that further rollout was likely be delayed as a result of the breach.

Yet statements from exchanges about the viability of their own BitGo implementations suggest that at least some of the service's customers aren't looking to make any changes, at least for now.

Is the CFTC to blame?

Bitfinex settled with the US Commodity Futures Trading Commission (CFTC) earlier this year over alleged trading violations, paying a $75,000 settlement while neither admitting or denying the charges.

At issue, the CFTC said at the time, was how the exchange held control of bitcoin private keys tied to user funds connected to financed trading. The agency’s view was that these bitcoins weren’t actually "delivered" following the purchase of them, but rather remained under the control of Bitfinex.

Since the hack, some critics pointed to that language in the CFTC settlement as creating the ideal conditions for the theft by prohibiting Bitfinex from using cold storage for customer funds.

Advocacy group Coin Center, however, moved to dismiss the claim that the CFTC was to blame, arguing that multi-sig is one of a number of security approaches and, like others, is prone to vulnerability or failure.

Press materials from last year also indicate that Bitfinex's relationship with BitGo predates the CFTC's investigation.

Image via Shutterstock

Disclosure: CoinDesk is a subsidiary of Digital Currency Group, which has an ownership stake in BitGo. 

The leader in blockchain news, CoinDesk is an independent media outlet that strives for the highest journalistic standards and abides by a strict set of editorial policies. Interested in offering your expertise or insights to our reporting? Contact us at [email protected]

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Moon bitcoin hack Earn With Me

Seoul-based Youbit said it was filing for bankruptcy after cyber-thieves stole nearly a fifth of its clients' holdings in an attack Tuesday.

It's the second time this year that Youbit, which allows customers to trade bitcoin and other digital currencies, has been hit by hackers.

In April, thieves made off with 38 billion won ($35 million) in digital currencies. The company didn't say how much was taken in the latest heist or how exactly it happened.

South Korea's Korea Internet and Security Agency said Wednesday that it was working with police to investigate this week's Youbit hack, but that it didn't yet know who was responsible.

Youbit said that its customers would get back about three-quarters of the value of the digital currencies they had stored in accounts with the exchange. The rest will be refunded after bankruptcy proceedings, it said.

Bitcoin's history is littered with cases of trading platforms coming under attack.

Earlier this month, hackers stole more than $70 million worth of bitcoins from digital currency platform Nicehash. Last year, Hong Kong-based exchange Bitfinex was briefly shut down after hackers stole more than $60 million in bitcoins.

Tim Wellsmore, director of threat intelligence at cybersecurity firm FireEye, said bitcoin exchanges had been slow to respond to the threats posed by hackers.

"As the prices of bitcoin and similar virtual currencies continue to appreciate, we expect greater interest from attackers seeking to steal it," he said.

Bitcoin's price (XBT) is now more than 15 times as high as it was at the start of the year.

Suspicion for this week's Youbit hack could fall on North Korea.

South Korean police have accused North Korean hackers of targeting at least four different exchanges this year that trade bitcoin and other digital currencies in South Korea.

North Korea has previously denied any role in international cyberattacks.

Bitcoin, which offers layers of anonymity, has long been a magnet for criminals.

Unlike traditional currencies like the U.S. dollar, digital currencies don't fall under central bank control and are largely unregulated.

South Korea has become a hotbed of bitcoin activity. On a given day, the country can account for about 20% of worldwide trading in the cryptocurrency.

Bitcoin is in such high demand there that traders can end up paying a premium of between 15% and 20% compared with prices elsewhere.

Youbit was a small player in the market, which is dominated by Bithumb, a much larger exchange.

With so many small South Korean investors diving into bitcoin, authorities are getting worried about the potential impact of a crash.

The government earlier this month said it was forming a special task force to study the "cryptocurrency problem."

-- Jake Kwon and Hannah Kang contributed to this article

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