Supercomputers can assist in Cyber Security by Identifying threats, detecting anomalous behaviour and finding software vulnerabilities

Supercomputers have  become essential for National Security, for decoding encrypted messages, simulating complex ballistics models, nuclear weapon detonations and other WMD, developing new kinds of stealth technology, and cyber defence/ attack simulation. Because of the expense, supercomputers are typically used for the most intensive calculations, like predicting climate change, or modeling airflow around new aircraft.