The Cyber security and Infrastructure Security Agency (CISA) is a U.S. government agency under the Department of Homeland Security (DHS) that is responsible for safeguarding the nation’s critical infrastructure from cyber threats and physical risks

Established in 2018, CISA plays a key role in enhancing the cyber security posture of federal, state, and local government agencies, private organizations, and the general public.

CISA also collaborates with private sector partners, sharing information about emerging threats and vulnerabilities, and works internationally to support a secure and resilient global cyber environment.