VA-003 Explain Vault architecture Practice Question
A company requires that Vault's master key be split into multiple key shares and distributed to different administrators using Shamir's Secret Sharing. They also need to ensure that Vault can automatically unseal if a majority of shares are provided but cannot rely on manual intervention. Which unseal approach should they configure?
⚠ Common exam trap
HashiCorp often tests the distinction between 'Shamir seal' (which uses multiple shares and a key provider for auto-unseal) and 'Shamir's Secret Sharing' (which is the manual unseal process), causing candidates to confuse the two and incorrectly select a single-key auto-unseal option like AWS KMS.
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
✓
Configure Shamir seal with a threshold and use unseal keys via a key provider
Shamir seal (also known as the 'seal' wrapping mechanism) allows Vault to use Shamir's Secret Sharing to split the master key into shares, and then automatically unseal by providing those shares via a key provider (e.g., a cloud KMS or HSM) without manual intervention. This satisfies the requirement of splitting the key among administrators while enabling auto-unseal when a majority of shares are available.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Store the master key in the transit secrets engine and unseal automatically
Why it's wrong here
Transit engine encrypts data but does not handle unseal.
- ✗
Use AWS KMS as a seal for auto-unseal
Why it's wrong here
AWS KMS auto-unseal does not split the master key; it uses a single KMS key.
- ✓
Configure Shamir seal with a threshold and use unseal keys via a key provider
Why this is correct
Shamir seal with auto-unseal can be achieved by combining shares using a shamir seal wrapper.
- ✗
Use a single unseal key stored in a password manager and manually unseal
Why it's wrong here
Manual unseal with one key defeats the purpose of secret sharing.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This VA-003 practice question is part of Courseiva's free HashiCorp 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 VA-003 exam.