Monitoring and surveillance infrastructure for stricter security checks. Like, body and baggage scanners, X-ray imaging equipment, infrared sensors and heat sensing and security cameras. They also use biometrics to verify identity, people caught to be unlawful will be detained by security officers.

Governments may also respond to the threat of terrorism by implementing laws. For example, the International Security Act is a law that enables the Singapore government to act decisively and swiftly against dangers for the security of Singapore and its people. They investigate security threats like terrorism and acts of violence or hatred using race or religion, authorities also impose preventive detention against individuals who pose a security threat to Singapore.