Bitfinex: Cause of Bitcoin Hack Still 'Unknown'
Nearly two weeks after losing more than $60m in customer funds, Bitfinex reports it has not yet identified how the theft was carried out.
In a statement released earlier today, the exchange reported it had hired Ledger Labs, a blockchain consultancy previously contracted by ShapeShift following its own cybersecurity problems, to both investigate the theft as well as perform a balance sheet audit....
http://www.coindesk.com/bitfinex-most-user-funds-offline/