Australian cryptocurrency exchange BTC Markets has accidentally filtered the data of all its customers, including their names and e-mail addresses, Business Insider Australia reports.
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The leak occurred through an e-mail marketing campaign. The e-mails were sent in batches of 1,000, which means that each customer received the data of 999 other customers. BTC Markets has written:
"The process took place very quickly, therefore it was not possible to stop the batch send once the error was realized."
BTC Markets is currently preparing a report for the Office of the Australian Information Commissioner. The company CEO Caroline Bowler has offered her "heartfelt apologies" for the incident and said the exchange's management team is working to limit the consequences and implement additional security measures.
Bowler has advised customers to ensure they enable two-factor authentication on their accounts and change their e-mail passwords. The leaked information could be used to carry out hacks or phishing attacks. She claims the exchange itself is secure and no other information has been compromised.