What does TPI stand for?

• A. Two Person Integrity
• B. Two Phase Isolation
• C. Time Prioritization Interface
• D. Trusted Protocol Interface

Answer: (A)

Two Person Integrity means that any sensitive operation requires the involvement of two authorized individuals, ensuring no single person can perform the action alone. This dual-control setup helps prevent insider threats and adds redundancy, which is crucial in high-security environments where access to sensitive materials or critical actions must be jointly authorized. In practice, two people might need to verify, authorize, or physically handle something together before proceeding, which significantly reduces the chance of misuse or error. The other phrases listed don’t reflect the standard meaning of this acronym in security contexts, as they aren’t commonly used terms for dual-control access or authorization.