A newly released top secret report shows a top priority for boosting counter-terrorism is faster and wider harvesting of data about people.
The 135-page report for the Security Intelligence Service, about how it performed prior to the mosque attacks, warns that what it calls "data mining" may not go down well with the public.
The SIS ordered the review after the March 15 shootings and it was done by an independent expert from a Five Eyes partner.
Reporter Phil Pennington has been looking through the document.
