https://motherboard.vice.com/en_us/article/ne3pwk/an-alleged-hacker-stole-dollar30-million-in-cryptocurrency > Cryptocurrency startup Tether announced late on Monday night that an “external attacker” stole more than $30 million USD worth of digital money from the company. > Tether issues digital tokens backed by its own reserves of fiat money (one USDT token is equal to one dollar USD, for example) over a protocol called Omni that runs on the Bitcoin blockchain. The company is a major player in the cryptocurrency space, and several large exchanges have integrated Tether as a method of payment.