What does the DF Two Person Integrity (TPI) ensure?

• A. Single access for authorized personnel
• B. Storage of keying material by one person
• C. Access requires two authorized individuals
• D. Long-term storage solutions only

Answer: (C)

The DF Two Person Integrity (TPI) concept ensures that access to critical systems, specifically those involving sensitive information or keying material, requires the presence of two authorized individuals. This measure is essential for maintaining the integrity and security of classified operations, as it reduces the risk of unauthorized access or mishandling of data. By requiring two people to be involved in the access or handling of sensitive information, the possibility of fraud or error is significantly minimized, thereby enhancing overall security.

While the other options touch upon aspects of security, they do not embody the fundamental principle of TPI. Single access for authorized personnel could create vulnerabilities, as it does not provide the additional layer of oversight necessary for safeguarding sensitive operations. Storing keying material by one person contradicts the two-person requirement, thus failing to implement the necessary safeguards that TPI is designed to enforce. Lastly, long-term storage solutions may involve various protocols but do not specifically address the necessity for dual authorization in access and handling of sensitive data.