What metrics would you use to evaluate a TA program's effectiveness and trust posture?

• A. Mean time to detect/resolve; attestation success rate; false positive rate; time to containment; policy compliance
• B. Number of users; network throughput; audit findings; incident recurrence rate
• C. Vendor renewal rate; system uptime; patch coverage; login success rate
• D. Data throughput; storage usage; number of keys; digest size

Answer: (A)

Evaluating a TA program focuses on how well it detects and handles issues, how reliably it establishes trust, and how it enforces policies. Mean time to detect and mean time to resolve show how quickly the TA helps uncover and close incidents, which is crucial for minimizing impact. Attestation success rate reflects how reliably the TA can verify integrity and trust claims, a direct measure of trust posture. False positive rate matters because high false alarms erode trust and waste resources, so a lower rate indicates higher precision in trust-related signals. Time to containment indicates how fast threats are contained after detection, another key indicator of effectiveness in limiting damage. Policy compliance measures how well the TA program enforces established security rules and governance, tying operational performance to trust and accountability.

Other options tend to emphasize general system capacity or asset counts (like users, throughput, uptime, keys, digest sizes) rather than the TA program’s ability to detect, verify trust, contain threats, and enforce policies. That makes them less informative about the TA’s effectiveness and trust posture.