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Explain encryption as a service →easyMultiple ChoiceObjective-mapped

VA-003 Explain encryption as a service Practice Question

This VA-003 practice question tests your understanding of explain encryption as a service. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.

Exhibit

$ vault read transit/keys/my-key
Key                       Value
---                       -----
allow_plaintext_backup    false
deletion_allowed          false
derived                   false
exportable                false
keys                      map[1:...]
latest_version            2
min_available_version     0
min_decryption_version    1
min_encryption_version    0
name                      my-key
supports_encryption       true
supports_decryption       true
supports_derivation       true
supports_key_rotation     true
type                      aes256-gcm96

Refer to the exhibit. What does min_decryption_version = 1 indicate?

Question 1easymultiple choice
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Exhibit

$ vault read transit/keys/my-key
Key                       Value
---                       -----
allow_plaintext_backup    false
deletion_allowed          false
derived                   false
exportable                false
keys                      map[1:...]
latest_version            2
min_available_version     0
min_decryption_version    1
min_encryption_version    0
name                      my-key
supports_encryption       true
supports_decryption       true
supports_derivation       true
supports_key_rotation     true
type                      aes256-gcm96

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

✓

Version 1 is the minimum version that can be used for decryption.

In Vault Enterprise, the `min_decryption_version` parameter on a transit key specifies the lowest key version that is allowed to decrypt existing ciphertext. Setting `min_decryption_version = 1` means that any key version from 1 up to the current version can be used for decryption; version 1 is the minimum allowed. This ensures backward compatibility while allowing newer versions to be used for encryption.

Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Answer analysis

Option-by-option breakdown

For each option: why learners choose it and why it is or isn't the right answer here.

  • ✗

    Data encrypted with version 1 can only be decrypted with version 1.

    Why it's wrong here

    Higher versions can also decrypt if min_decryption_version ≤ version used.

  • ✗

    Only data encrypted with version 1 or higher can be decrypted.

    Why it's wrong here

    This is about decryption version, not encryption version.

  • ✓

    Version 1 is the minimum version that can be used for decryption.

    Why this is correct

    Decryption requests must use a key version >= min_decryption_version.

    Related concept

    Read the scenario before looking for a memorised answer.

  • ✗

    All ciphertext must be rewrapped to version 1.

    Why it's wrong here

    Rewrapping is not forced by this parameter.

  • ✗

    Version 1 keys are not allowed for decryption.

    Why it's wrong here

    Version 1 is allowed; versions below 1 are not.

Common exam traps

Common exam trap: answer the scenario, not the keyword

HashiCorp often tests the distinction between `min_encryption_version` and `min_decryption_version`; the trap here is confusing which parameter controls encryption versus decryption, leading candidates to incorrectly assume `min_decryption_version` restricts encryption or forces rewrapping.

Detailed technical explanation

How to think about this question

Under the hood, Vault's transit secrets engine maintains a key ring with multiple versions, each with its own creation time and ciphertext metadata. The `min_decryption_version` parameter is stored as part of the key policy and is enforced during the `decrypt` API call: if the ciphertext's key version is lower than `min_decryption_version`, the request is rejected. This is critical in key rotation scenarios where older ciphertext must remain decryptable until a specific version is deprecated, preventing accidental data loss while phasing out weak algorithms or compromised keys.

KKey Concepts to Remember

  • Read the scenario before looking for a memorised answer.
  • Find the constraint that changes the correct option.
  • Eliminate answers that are true in general but not in this case.

TExam Day Tips

  • Watch for words such as best, first, most likely and least administrative effort.
  • Review why wrong options are wrong, not only why the correct option is correct.

Key takeaway

Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.

Real-world example

How this comes up in practice

A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.

What to study next

Got this wrong? Here's your next step.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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FAQ

Questions learners often ask

What does this VA-003 question test?

Explain encryption as a service — This question tests Explain encryption as a service — Read the scenario before looking for a memorised answer..

What is the correct answer to this question?

The correct answer is: Version 1 is the minimum version that can be used for decryption. — In Vault Enterprise, the `min_decryption_version` parameter on a transit key specifies the lowest key version that is allowed to decrypt existing ciphertext. Setting `min_decryption_version = 1` means that any key version from 1 up to the current version can be used for decryption; version 1 is the minimum allowed. This ensures backward compatibility while allowing newer versions to be used for encryption.

What should I do if I get this VA-003 question wrong?

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 30, 2026

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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.