The Safeguarding Australia Summit has been the country's foremost security conference since 2004.
Here are some of the highlights.
SAFEGUARDING AUSTRALIA 2017
Theme: Turning points in security.
"Competing priorities, growing threats and increasing complexity will continue to present fundamental challenges to Australia’s national security agenda in the coming years.
Public and private security professionals — policy makers, practitioners and providers — will be forced to address a wide range of issues which have developed over recent decades and continue to grow, such as violent extremism, cyber threats (from lone and state actors), border control and legislation.
In coming years, they will need to also contend with the security issues inherent in societal issues, adding known-unknown dimensions to an already complex national security agenda, most notably an ageing population, technology creeping into all facets of life, and diversity in the workplace reflecting an increasingly cosmopolitan society."
SAFEGUARDING AUSTRALIA 2016
Theme: Protecting the Homefront.
"The national security threat posed by contemporary terrorism ranges from organised attacks against societies, to inspired attacks against individuals. At the core of the threat is the spread of extremist propaganda used to radicalise, recruit and inspire others.
The frontline of this conflict spans the globe and reaches the homes of ordinary citizens through traditional media and social networking platforms. Today’s counterterrorism initiatives include interdicting and disrupting terrorists operations, but they focus more than ever on Countering Violent Extremism (CVE) and combating terrorist propaganda."
SAFEGUARDING AUSTRALIA 2015
Theme: Global Violent Extremism: Another Long War.
"The 2015 conference theme is Global Violent Extremism and addresses the re-emergence of violent and radical ideologies as a major international security threat. The theme bridges external threats, such as the Islamic State, and their links to domestic threats, such as sectarian tensions within communities, the return of foreign fighters and internationally-inspired terror plots."