Overview
The Cybersecurity and Infrastructure Security Agency (CISA) and the National Security Agency (NSA) are two distinct US agencies that play vital roles in protecting the nation's cybersecurity and infrastructure. While CISA focuses on protecting critical infrastructure and promoting cybersecurity awareness, the NSA is responsible for collecting, analyzing, and disseminating foreign signals intelligence to support national security decision-making. As noted by experts like Bruce Schneier and Dan Geer, the distinction between these agencies is crucial in understanding the complex landscape of US cybersecurity. For instance, CISA's collaboration with private sector companies like Microsoft and Google has been instrumental in enhancing the nation's cybersecurity posture, whereas the NSA's work with international partners like the UK's GCHQ has facilitated the sharing of threat intelligence and best practices.