GSEC Endpoint Security Practice Question
A healthcare provider must protect laptops that store electronic protected health information (ePHI). The security team wants to ensure that if a laptop is lost or stolen, the data on the drive remains confidential even if an attacker removes the drive and connects it to another computer. The team also wants to minimize the risk of cold-boot attacks that could extract encryption keys from memory. Which full disk encryption configuration best meets these requirements?
⚠ Common exam trap
The trap here is assuming that any BitLocker configuration with a TPM provides pre-boot authentication, when TPM-only mode boots without user input.
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
✓
BitLocker with TPM and PIN protector, plus pre-boot authentication
BitLocker with a TPM and PIN protector enforces pre-boot authentication, so the drive cannot be unlocked without the PIN and the TPM-bound key. This protects against offline drive removal and reduces the window for cold-boot or DMA attacks because the operating system and keys are not loaded until the PIN is entered, satisfying both confidentiality and cold-boot risk reduction.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
BitLocker with a startup key stored on a USB flash drive
Why it's wrong here
A startup key on a USB drive provides pre-boot authentication, but it requires the user to insert the USB drive at every boot. If the USB drive is lost or stolen with the laptop, the protection is defeated. It also adds operational burden and does not leverage the TPM to seal keys to the platform. This configuration is weaker than a TPM and PIN combination for the stated threat model.
- ✓
BitLocker with TPM and PIN protector, plus pre-boot authentication
Why this is correct
BitLocker with a TPM and PIN protector requires a user-entered PIN before the operating system loads, providing pre-boot authentication. This means an attacker who steals the laptop cannot simply boot it to reach the decryption keys in memory, significantly reducing cold-boot and DMA attack risk. The TPM also seals keys to the platform, so moving the drive to another computer does not allow decryption, meeting the confidentiality requirement.
- ✗
BitLocker with TPM-only protector and no PIN
Why it's wrong here
TPM-only BitLocker protects against offline attacks when the drive is removed, but it does not require a pre-boot PIN. An attacker who steals the laptop can boot it and may exploit a cold-boot attack to extract keys from memory, or use a DMA attack. The scenario explicitly asks to minimize cold-boot risk, so a configuration without pre-boot authentication is insufficient even though it encrypts the drive.
- ✗
EFS encryption of the ePHI folders with user certificates
Why it's wrong here
EFS encrypts individual files and folders, not the entire drive, and it relies on user certificates and keys that may be cached in memory. If the drive is removed and attached to another system, an attacker may be able to access unencrypted areas or recover keys. EFS does not provide pre-boot authentication and is not a full disk encryption solution, so it does not meet the requirement to protect all data if the laptop is lost.
About these practice questions
This GSEC question is part of Courseiva's 351-question bank — original exam-style content with full explanations and wrong-answer analysis, never real exam questions or exam dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official GIAC exam blueprint
This GSEC practice question is part of Courseiva's free GIAC 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 GSEC exam.