'The cyber domain is a vector for threats posed by hostile state actors, criminals, terrorist networks and hacktivists,' the Ministers said.
'A cyber attack is an attack on our communities and our sovereignty.'
The Five Eyes partners agreed to further strengthen the relationships between their cyber watch units, including the 24/7 global monitoring capability in the Australian Cyber Security Centre that was officially opened in Canberra in August.
These cyber watch offices will contribute to enhanced, shared 24/7 monitoring of and response to hostile cyber activity.
The five countries also committed to work together to protect critical infrastructure and support the development of secure critical infrastructure supply chains.
They will share risk assessments and certification practices on supply chains. This aims to support the continued resilience of cyber networks and prepare for new and emerging technologies.