Which principle controls access to classified information by limiting it to those with a need to know?

• A. Need-to-know
• B. Secrecy
• C. Transparency
• D. Access

Answer: (A)

Access to classified information is governed by need-to-know—the idea that a person’s access is limited to information necessary for their specific duties. Even with a high security clearance, someone should not see information unless their job requires it. This approach creates compartmentalization, reducing the chance of sensitive details leaking or being misused.

Why this fits best: it directly ties access to job relevance, not just to being cleared. Without need-to-know, clearance alone could expose people to information they don’t need, increasing risk. For example, a person in logistics with top-secret clearance isn’t automatically entitled to technical intelligence unless their role requires it.

Other terms describe broader or different ideas. Secrecy is about keeping information hidden in general, transparency is about openness and sharing, and access is a general term for being able to reach information but doesn’t specify the justification tied to one’s role. Therefore, the need-to-know principle is the correct mechanism for controlling access.