The summit gathers Defence and National Security stakeholders to address current and emerging cyber threats to australia's security.
Minister for Defence, Stephen Smith, said the cyber threat to Australia was real, evolving and a growing test to the countrys national security establishment.
"It comes from a wide range of sources, and from adversaries possessing a broad range of skills," Smith said in a statement. "Cyber attacks are becoming increasingly more sophisticated and targeted. They are no longer confined to random acts of opportunism."
This is the third annual event in the series which kicked off with a a highly successful inaugural event in July 2011.