The Government Communications Security Bureau (GCSB) is a New Zealand intelligence agency responsible for collecting and analyzing foreign signals intelligence. Its primary role is to protect New Zealand's national security and interests by monitoring communications and cyber threats from outside the country. GCSB also provides support to other government agencies, including the New Zealand Defence Force and New Zealand Police, by sharing intelligence and expertise. The agency plays a crucial role in safeguarding New Zealand's critical infrastructure and ensuring the safety of its citizens from external threats.