The healthcare sector has topped the list of notifiable data breaches reported to the Office of the Australian Information Commissioner (OAIC) in its latest six-monthly report from January to June 2021, with 85 data breaches or 19 per cent of the 446 in total.

While ransomware makes up 24 per cent of the 192 notifications resulting from cyber security incidents, the OAIC says a number of entities did not think that a ransomware attack was an eligible data breach due to doubts over whether data had actually been exfiltrated.