Legal Definitions - Defense Information Systems Agency

The Defense Information Systems Agency (DISA) is a critical organization within the U.S. Department of Defense. Its primary mission is to develop, operate, and secure the global information technology and communications infrastructure that supports the U.S. armed forces worldwide. Essentially, DISA ensures that military personnel have the secure and reliable digital tools, networks, and services they need to carry out their missions, from daily operations to complex combat scenarios.

• Example 1: Secure Global Communications for Commanders

  Imagine a U.S. Army general deployed in a remote operational theater needing to securely communicate real-time intelligence updates to the Pentagon in Washington D.C. DISA is responsible for building and maintaining the encrypted satellite and fiber optic networks that enable this critical, secure communication. This illustrates DISA's role in providing the foundational communication systems necessary for military command and control across vast distances, ensuring vital information reaches the right people without compromise.

• Example 2: Providing Secure Cloud Services for Military Applications

  A new military application designed to track logistics for troop movements and supply chains requires a highly secure and scalable cloud environment to store sensitive data and operate effectively. DISA provides and manages these specialized cloud services, often referred to as "milCloud," ensuring that sensitive military data and applications are hosted in a protected, compliant, and readily accessible infrastructure. This demonstrates DISA's function in delivering modern, secure IT services to support military operations and data management.

• Example 3: Cybersecurity for Defense Networks

  When a foreign adversary attempts to breach a U.S. military network to steal sensitive information or disrupt operations, DISA plays a crucial role in defending against such cyberattacks. They implement advanced cybersecurity protocols, continuously monitor network traffic for threats, and develop defensive strategies to protect the integrity and confidentiality of military information systems. This highlights DISA's responsibility for safeguarding the digital backbone of the U.S. military from malicious cyber activities, ensuring operational continuity and data security.