Network and cyber security in New Zealand
Telecommunications networks are crucial infrastructure. They carry essential services and underpin the economy.
If networks fail, business and daily life can quickly stall. New Zealand also depends on digital services that rely on those networks. Protecting infrastructure and the data moving across it matters.
It’s not just internal networks. The country connects to the world through a small number of submarine cables.
Where the threats come from
Cyber threats come from both criminals and states.
Criminal gangs operate worldwide. They target networks, service providers and supply chains, often using ransomware or data theft.
States use cyber operations as part of wider strategy. Attacks can support political pressure, economic goals or military planning. They may target infrastructure such as networks and submarine cables, as well as the systems that support them.
What are our defences?
Government agencies, intelligence services and private sector specialists all play a role. Telcos and network operators run their own security teams.
They monitor networks, manage risks and respond to incidents. This includes both cyber threats and physical risks.
Engineers and contractors maintain the physical infrastructure. That includes cables, exchanges and data centres.
Responsibility is shared.
- Network operators secure their own assets
- Contractors handle maintenance and field work
- Government agencies oversee national security risks
Physical protection ranges from controlled access at key sites to monitoring cable routes and landing stations.
Resilience matters
New Zealand’s networks face risks beyond cyber attacks. Severe weather, earthquakes and accidental damage can all disrupt services. Cable cuts remain the most common cause of major outages.
Operators design networks to limit the impact. They build redundancy with multiple routes and landing points, including fibre networks across the country. Traffic can be rerouted when faults occur, although capacity and performance may be affected.
Resilience is not just about infrastructure. It also depends on how quickly faults are detected and fixed. Monitoring systems, standby capacity and pre-planned response procedures all help reduce downtime.
Coordination and response
Because no single organisation oversees network security, coordination is important
Telcos, infrastructure providers and government agencies share information about threats and incidents, often within the framework set by telecommunications regulation. This helps identify risks early and respond more quickly when problems occur.
In serious cases, responses can involve multiple parties, including network operators, emergency services and national security agencies. The aim is to restore services and limit wider disruption.
Further reading on network and cyber security
This page is part of a series of background briefings on New Zealand’s telecommunications industry: