Yahoo breach likely to have exposed all 3bn users

Internet giant Yahoo now believes a 2013 security breach exposed all 3bn of its users at the time.

An assessment based on intelligence obtained after the $4.5bn (€3.8bn) acquisition of the business by Verizon, earlier this year, showed the number of accounts compromised by the hack was far higher than Yahoo’s initial estimate of 1bn.

The information stolen did not include passwords in clear text, payment data or bank accounts.