CISA stands for “Cybersecurity and Infrastructure Security Agency.” CISA is a United States government agency responsible for protecting the nation’s critical infrastructure from cyber threats and physical attacks. The agency was established in November 2018, as part of the Department of Homeland Security (DHS), and is tasked with coordinating with other federal, state, local, and private sector entities to manage and respond to cybersecurity and infrastructure security risks. CISA’s responsibilities include sharing threat intelligence and providing guidance on best practices for cybersecurity and critical infrastructure protection, as well as responding to and investigating cybersecurity incidents and promoting resilience in the face of emerging threats.