What is Cybersecurity? | CISA
Feb 1, 2021 · What is cybersecurity? Cybersecurity is the art of protecting networks, devices, and data from unauthorized access or criminal use and the practice of ensuring confidentiality, …
Home Page | CISA
Nov 19, 2025 · JCDC unifies cyber defenders from organizations worldwide. This team proactively gathers, analyzes, and shares actionable cyber risk information to enable synchronized, …
Cybersecurity | Homeland Security
Sep 29, 2025 · Cybersecurity and Infrastructure Security Agency (CISA) Cyber Safety Review Board (CSRB) The Cyber Safety Review Board (CSRB), an independent public-private …
Countering Chinese State-Sponsored Actors Compromise of …
Sep 3, 2025 · The authoring agencies strongly urge network defenders to hunt for malicious activity and to apply the mitigations in this CSA to reduce the threat of Chinese state …
Cybersecurity Training & Exercises | CISA
Cybersecurity Exercises CISA conducts cyber and physical security exercises with government and industry partners to enhance security and resilience of critical infrastructure. These …
Cybersecurity Awareness & Training | CISA
Cyber Essentials Starter Kit: The Basics for Building a Culture of Cyber Readiness (.pdf, 1.17 MB) (CISA) Cyber Essentials is a guide for leaders of small businesses, as well as leaders of small …
Primary Mitigations to Reduce Cyber Threats to Operational ... - CISA
May 6, 2025 · The Cybersecurity and Infrastructure Security Agency (CISA), Federal Bureau of Investigation (FBI), Environmental Protection Agency (EPA), and Department of Energy (DOE) …
Cybersecurity Alerts & Advisories | CISA
Nov 18, 2025 · Cybersecurity Advisory: Provides detailed information on cyber threats, including threat actor tactics, techniques, and procedures and indicators of compromise, along with …
#StopRansomware: Medusa Ransomware - CISA
Mar 12, 2025 · Medusa is a ransomware-as-a-service (RaaS) variant first identified in June 2021. As of February 2025, Medusa developers and affiliates have impacted over 300 victims from a …
National Terrorism Advisory System Bulletin - Homeland Security
Jun 22, 2025 · Low-level cyber attacks against US networks by pro-Iranian hacktivists are likely, and cyber actors affiliated with the Iranian government may conduct attacks against US …