A Russian hacker extradicted to the US earlier this year admitted his role in the largest hack in US history. The attack compromised more than 160 million credit card numbers, resulting in hundreds of millions of US dollars in losses.

Vladimir Drinkman, 34, said Tuesday in federal court in Camden, New Jersey, that he plotted with four other men to steal credit card numbers from payments processors Global Payments and Heartland Payment Systems, grocery chain Hannaford Brothers and at least 14 other organisations from 2005 to 2012.