China’s underground bitcoin miners
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A farm in Sichuan Province is home to workers who transfer crypto mining rigs.
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Kirk mines for bitcoinSichuan in China, hoping that one day he won’t be caught by authorities.
As other cryptocurrency miners have done underground since Beijing cracked down on the industry earlier this year, Kirk — who asked only to be identified by his nickname to ensure his safety — is getting creative to evade detection.
Kirk spreads his mining equipment over multiple locations so no single operation is left out of the nation’s electric grid. Kirk has “behind-the-meter” and draws electricity from local, small power sources, which aren’t connected to larger grids like dams. He also took steps to disguise his geographical digital footprint.
Kirk said to CNBC that although he was used to “getting round things” when it came to China’s business world, these six months have really upped the stakes.
“We never know to what extent our government will try to crack down…to wipe us out,” Kirk said.
Bitcoin mining in Sichuan (China)
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Recognizing outlaws
Kirk isn’t the only one.
There are however Beijing exiled its crypto miners in MayAnd then doubled down on its mining ban in September again in NovemberMultiple sources inform CNBC that up to 20% of the global bitcoin miners are still in China. This represents a significant drop from its peak in around 65%You can find more information here 75%The global market is much larger than the one in which it operates, however. official estimate from Cambridge UniversityThat puts China at 0%.
Data from Chinese cybersecurity company Qihoo 360This shows that underground crypto-mining is alive and well across China. The research group reported that on an average, 109,000 IP addresses are used for crypto mining in China every day. According to the research group, most of these addresses are located in Guangdong and Jiangsu.
Many miners in China didn’t know if Beijing meant to ban crypto mining.
China has repeatedly lashed out against digital currenciesHowever, each time it was less painful and rules became more relaxed. This spring, the country announced that it was cracking down crypto mining. It did so in conjunction with the 100th anniversary of the founding Chinese Communist Party. At that time there was pressure for lawmakers to be strong. Some miners – especially smaller-scale operators who didn’t have the resources or the connections to migrate abroad – figured a lot of the crypto talk by the government was bravado, so they powered down, laid low for a few weeks, and then came back online, taking a few extra precautions when they did.
This crypto crackdown seems to be different because of a few important reasons.
China has a shortage of power which is vital for the bitcoin mining process. This country is currently facing its worst. energy shortagePower cuts can occur in as little as a decade.
Beijing made clear, however that crypto mining does not support its aggressive climate goals. carbon neutrality by 2060. Meng Wei, the government spokesperson for November, denounced bitcoin mining, calling it an “extremely harmful” practiceVoiding to take stricter enforcement actions.
Bitmain Technologies Ltd. (Ordos) inspects the machines used to mine bitcoins at their mining plant on Friday, Aug. 11, 2017.
Qilai shen | Bloomberg | Getty Images
As well, the threat of competition from digital currency is growing. This country is testing its own central bank digital currencyThe government could have greater control over spending and be able to monitor it in real-time. Fred Thiel is the CEO of Marathon Digital Holdings. He also belongs to the Bitcoin Mining Council.
Thiel speculated that “China’s government will do everything possible to make sure bitcoin and other cryptocurrency disappear from China’s financial system and economy.” Thiel speculated that part of the goal is to secure China’s adoption of the digital currency of its central bank. Another aspect is likely to allow financial surveillance to monitor all economic activity.
Regardless of the motivation, it is evident that the government has become increasingly hostile to crypto-related ventures.
The provinces of Zhejiang, Jiangxi, HebeiPlease see the following: Inner MongoliaFor example, there have been varying levels of government action such as asking local officials to run their own self-compliance checks, screening IP addresses for illicit mining activity, raiding illegal underground crypto minesPlease see the following: arresting expelling party members suspected of participating in crypto mining schemes.
Authorities are paying particular attention to mining at community centers, research institutions and schools. There, electricity prices can sometimes be lower than the going rate. The government pledged to increase energy prices for those institutions using subsidized electricity to mine in November.
Also, authorities are zeroing in on state-owned businessesParticipating in the trade.
This weekChina’s Central Commission for Discipline Inspection (the country’s anticorruption watchdog) said that it has identified many state-owned entities within Zhejiang’s eastern province. These were mining for 12 cryptocurrencies including monero, ether and litecoin. 21 people were from state-owned companies or Communist Party offices.
State-owned entities were also tied in to crypto mining schemes.
The communication watchdog of Jiangsu found that 21% were IP addresses belonging to state-owned entities in the region’s coastal region.
Many, including Kirk, are able to survive despite the growing government efforts to eradicate all crypto miners.
On Friday, August 11, 2017, technicians repaired bitcoin mining machines in an Ordos mining facility, Inner Mongolia.
Qilai shen | Bloomberg | Getty Images
Going underground
China’s crypto mining crackdown began in May. Most of the industry was virtually dead within an hour, while miners waited to see if the dust settled.
CNBC spoke with multiple players in China’s illegal crypto-mining market. CNBC had time to speak to some who were on the ground there and to others who are familiar with how they continue to function under increasing scrutiny from regulators.
One of the biggest names in the industry, with their connections and money, was able to quickly get out. Many of the players shipped their equipment and moved their teams from Kazakhstan to America and other countries with available power and hosting capacities.
Heavy hitters sometimes left their equipment in Asia’s warehouses and went to new pastures. Instead of putting orders for their latest machines, they ordered them to be shipped to their homes overseas.
However, smaller miners who had less disposable income or international connections were unable to move due to travel restrictions and supply chain bottlenecks.
The selling of gear was not a very effective off-ramp, because the flooding of inventory onto the resale marketplace sank the mining equipment market’s going rate.
According to an expert who spoke to CNBC, medium-sized miners felt “100% screwed” by this year’s crackdown. Their electrical footprint makes it easy for them to locate their equipment and prevent them from offloading their equipment.
It’s easier for smaller mines such as Kirk to slip under the radar. Some people divided up their mining operations in multiple farms that they were more likely to not be noticed by the authorities. Some others piggybacked on small, local sources of power, such as tiny dams located in rural areas not connected to main grid.
According to one Bitcoin miner, “Mining is no longer big business.” He said this after spending years mining crypto around the globe, including China. The anonymous source feared the authorities. The industry is now more fragmented, with only “a few thousand miners here and a few thousand there.”
“It’s more a kind of band-aid to raise money to move miners out the country.”
Illegal crypto mining
Kirk – who has been mining cryptocurrencies since 2015 – has one thousand mining rigs that are powered by grid electricity and another five thousand units tethered to hydropower, direct from the source in the southern province of Sichuan.
Kirk tells CNBC about the thousands of grid-powered miners he’s spread out over the country to hide from authorities.
“They’re everywhere. Kirk stated that you won’t see a pattern in the mining equipment he had plugged into power lines to get a little extra power.
Marshall Long who’s been mining for cryptocurrency for more than a decade, says that this is now a common practice.
Long explained that his friends are working in China underground mining. “They draw from the grid,” he said. They are usually mining in small chunks (20 megawatts) or less, which is kind of like buying a home to enable them to start small-scale mines.
For context, this means that downtown Dallas draws 200 megawatts. After the buildout has completed, America’s largest mineIt will be able to produce a maximum power output of 750 megawatts.
Kirk says grid pricing can be “really costly”. It is possible to make much more profit by using off-grid electricity, as it’s easier to run on the sly.
China’s wet season runs from May to the end of the fall. Monsoon-level rains translate into a lot more hydropower which can be captured better from behind the meters.
Beijing’s ban on crypto was issued at a time when miners were heading to Sichuan or Yunnan to mine crypto. This is due to the decentralized cluster of thousands dams. Compared to the coal plants in the northern provinces of Xinjiang and Inner Mongolia, which were once bastions of the crypto mining network, these dams are less trackable and harder to identify – and therefore less accountable to government regulation.
Kevin Zhang said, “There’s definitely a lot miners attached to hundreds and thousands of hydro dams in Sichuan.” Foundry is a digital currency platform that helped to bring more than $400 million worth of Chinese mining equipment into North America.
Kirk uses hydropower for most of the rigs. Two sites are located in Sichuan. One site has 12 megawatts, while the other is 8 megawatts. Kirk tells CNBC in China that a mine exceeding one megawatt is considered large.
Staying undetected: Techniques
Before the ban it had been a common practice for miners with means to hire (or construct) transformers and substations to supply power directly to their mining sites. Transformers take power from substations and turn it into a lower voltage, which can be then used to power Bitcoin miners.
Kirk paid an initial fee at one of the Sichuan sites to lease an entire power station that runs off grid. It is one way Kirk lowers his risk of being caught out.
Kirk may have taken precautions to cover his tracks, but he is still vulnerable to being discovered. China Telecom, the largest telecom company in the country, is said to double up as the Chinese mining police, looking for unusual electricity usage.
Once identified, the chain of command becomes a game of telephone — China Telecom refers the activity to the central government, who then relays this information to the specific province or town where the alleged mining is happening. Kirk says the local government will then call the power plant to verify the allegation.
Lianghekou Hydropower Plant on Yalong River in China’s Sichuan region
Xinhua News Agency | Getty Images
Kirk was recently affected by this incident, and he claims he was fortunate because the owner of the power plant likes him. Kirk’s suspicious activities were reported to the authorities by the power plant owner. Kirk received a full refund. After the call, Kirk shut off the mine for a few days, took some extra steps to mask his network traffic, then powered back on.
To keep miners under the radar, this kind of IT hygiene will be crucial.
To hide their IP addresses, miners use a virtual private networks (or VPN) to conceal their digital footprint. But Beijing is wise to the use of VPNsThey were used to bypass government censorship. The authorities have cracked down on them.
Underground miners now turn to mining pools to conceal their activities. They join cryptocurrency miners around the globe to share their computing power and also become part of mining pool. Multiple sources inform CNBC that although many Chinese mining pools have suspended their services, some pools continue to sign up Chinese miners.
Kirk explained that “they hide their hashrate.” The industry term hashrate refers to the combined computing power of all bitcoin miners.
The block is usually signed by the pool which won it. CNBC is told by multiple sources that when Chinese miners combine their computing power for solving a block of transactions, pool members no longer sign their names.
Kirk continued, “A pool does not have to disclose any data.” You’re basically saying to the world my income is half what it actually is. It’s not something you brag about.
This might explain China’s rapid drop in the market for bitcoin. Since the bitcoin mining index uses data that is freely shared by miners, it could also help to explain China’s nil share.
Multiple sources say that although pools don’t speak out about their work with Chinese miners they are very useful to these underground operations.
There are larger groups that still provide care. Kirk stated that they can provide technical assistance to assist you if your people aren’t skilled enough to do it.
CNBC interviewee Long says many foreign pools offer them technology that hides their activities.
Long explained that they encrypt their packets when it leaves the datacenter, making it appear like regular web traffic.
Kirk describes how he was able to use a pool of people in his network to help him set up a server so that it looked like it had more “connections points” It is suspicious that an IP address can have thousands of connection points sending massive amounts data. This makes it look suspect, especially in rural Sichuan. Kirk insists that miners can use pools to circumvent this problem.
Kirk stated, “As soon as they perform their magic, only five machines will be visible, which does not make it suspicious because anyone household can possess that.”
Bitcoin mining equipment for sale in Sham Shui Po
South China Morning Post | Getty Images
The migration of the “dry season”
China’s underground miners face a problem. The wet season has ended.
In the past, coal-powered power plants were used to generate electricity. Miners could pack their equipment and haul it along to Xinjiang. Both of these regions are no longer accessible to miners.
Zhang stated that it would be “really interesting” for China to have a 5% share in the world’s bitcoin market. He believes hydro dams will cause China to lose their water supply. Zhang said that many miners would have to surrender and send their equipment abroad.
Zhang said to CNBC that unplugging and rerouting miners is very painful. Therefore, he believes that most will be looking to North America for longer-term arrangements. He said, “It is a stable framework and it won’t change on you overnight.”
Kirk currently weighs that possibility.
Kirk remains in an awkward holding pattern until he makes a deal. Although he says he is selling some of his S19 series Antminer ASICs, for the most part, he’s hanging on to a lot of his machines until he figures out next steps.
Zhang explained that “these are basically money printers.” He said these machines give instant access to Bitcoin or U.S. Dollars if your cryptocurrency stake is liquidated. That kind of insurance policy in a country where capital controls are tight is very important.
“It’s a big reason why a lot of miners haven’t capitulated and sold their equipment, because for them, it’s access to capital overseas…once they get it plugged in,” said Zhang.
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