Japanese authorities yesterday ordered two cryptocurrency exchanges to suspend operations as part of a clampdown following a massive hack that saw thieves steal hundreds of millions of dollars in virtual currency.
The Financial Services Agency (FSA) said in a statement it had ordered FSHO and Bit Station, exchanges based in Yokohama and Nagoya, to temporarily halt their operations for a month from yesterday.
The agency alleged that FSHO “does not have a proper system to monitor trading and has not given training to its employees,” while an employee of Bit Station “diverted digital currency deposited by clients for his personal use.”
Immediate comments from the two exchanges were not available.
Authorities also ordered five other exchanges, including Coincheck, to improve their business practices.
Coincheck was already slapped with sanctions in January following the hack of its systems, which was one of the largest of its kind and resulted in the disappearance of NEM cryptocurrency worth $530mn.
At a press conference, Coincheck said it would start reimbursing customers affected by the theft and aim to restart its operations from next week, adding that details would be announced later on the firm’s website.
The company, whose offices were searched by authorities last month, has pledged to reimburse about $400mn to all 260,000 customers who lost their holdings of NEM, then the 10th biggest cryptocurrency by market capitalisation.
Coincheck chief operating officer Yusuke Otsuka said the company’s system was breached after several staff members opened emails containing malware.
The firm had failed to upgrade its systems to keep up with the rapid expansion of the cryptocurrency market, he said.
Following the fresh FSA order, Coincheck vowed to “thoroughly review its management”, take measures to protect its depositors, and deal with money laundering and terrorist funding.
It also said it would rebuild its internal network and strengthen restrictions on access to its server.
Asked whether the firm’s top managers would consider resigning to take responsibility for the incident, Coincheck chief executive Koichiro Wada said: “We are in a process of review, that includes that (option).”
In February, seven plaintiffs – two companies and five individuals – filed a lawsuit against Coincheck seeking the reimbursement of ¥19.53mn ($184,000) in lost virtual currency and further compensation for interest lost due to the hack.
Thieves syphoned away 523mn units of the cryptocurrency NEM from Coincheck during the January 26 hack, which exceeded the $480mn in bitcoin stolen in 2014 from another Japanese exchange, MtGox.
That hack prompted Japan to issue new regulations, requiring exchanges to obtain a licence from the FSA, but Coincheck was allowed to continue operating while the agency was reviewing its application.
As many as 10,000 businesses in Japan are thought to accept bitcoin, and bitFlyer – the country’s main bitcoin exchange – saw its user base grow beyond one million in November.
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