CAS-004 Security Engineering Practice Question
An IoT device uses a Trusted Platform Module (TPM) 2.0 for secure boot and attestation. Which THREE of the following functions does the TPM provide to support these security features?
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
✓
Platform Configuration Registers (PCRs) for storing measurements
TPM 2.0 provides secure boot (via PCR measurement), remote attestation (via quote operation), and sealed storage (binding data to PCR values). Measured boot is a process that uses TPM to record measurements.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Accelerated symmetric encryption
Why it's wrong here
TPM may support encryption but it is not a core function for secure boot/attestation.
- ✓
Platform Configuration Registers (PCRs) for storing measurements
Why this is correct
PCRs store hash measurements of boot components.
- ✗
Hardware random number generation
Why it's wrong here
While TPM has a random generator, it is not directly used for secure boot or attestation.
- ✓
Sealed storage that decrypts data only if PCR values match expected measurements
Why this is correct
Sealed storage ties decryption to platform state.
- ✓
Remote attestation using TPM_Quote to sign PCR values
Why this is correct
TPM_Quote signs PCR values for remote verification.
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JA
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.