CAS-004 Security Engineering Practice Question
An organization is implementing a Windows Hello for Business deployment to enable passwordless authentication. The solution uses TPM 2.0 for key storage. Which of the following TPM features ensures that the system has not been tampered with before the user authenticates?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Measured boot
Measured boot records measurements of boot components in PCR banks, which can be used for attestation to verify system integrity. Secure boot prevents execution of unauthorized code, but measured boot provides evidence of the boot chain. Sealed storage uses PCR values to restrict access to keys. Attestation is the process of proving the measurements to a verifier.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Secure boot
Why it's wrong here
Secure boot prevents unauthorized code from running but does not provide a means to verify boot integrity remotely.
- ✗
Sealed storage
Why it's wrong here
Sealed storage protects keys based on PCR values but does not verify boot integrity by itself.
- ✗
Attestation
Why it's wrong here
Attestation is the process of proving measurements, but measured boot is the feature that records the measurements.
- ✓
Measured boot
Why this is correct
Measured boot records boot measurements in PCRs, enabling attestation to verify that the system has booted into a known trustworthy state.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This CAS-005 practice question is part of Courseiva's free CompTIA certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the CAS-005 exam.