VA-003 Explain encryption as a service Practice Question
A developer wants to encrypt data using Vault's transit engine but does not want to base64 encode the ciphertext after encryption. What is the recommended way to handle this?
⚠ Common exam trap
HashiCorp often tests the misconception that you can set a `base64=false` parameter to get raw ciphertext, but the Vault API strictly enforces base64 encoding on both input and output for the transit engine.
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
✓
The ciphertext is always base64 encoded, so the client must decode it after receiving
The Vault Transit Secrets Engine always returns ciphertext as a base64-encoded string, regardless of whether the input plaintext was base64-encoded or raw. The API specification requires the client to decode the base64 ciphertext after receiving it if the original plaintext was raw bytes. There is no parameter to disable base64 encoding of the ciphertext output.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The ciphertext is always base64 encoded, so the client must decode it after receiving
Why this is correct
Correct: output is always base64.
- ✗
Use the `/transit/encrypt` endpoint with `base64=false`
Why it's wrong here
No such parameter exists.
- ✗
Set the `plaintext` parameter to the raw bytes
Why it's wrong here
The API expects base64-encoded input.
- ✗
Use the `ciphertext` parameter
Why it's wrong here
That would be for decryption.
- ✗
Use the `plaintext` parameter directly without base64 encoding
Why it's wrong here
Input must be base64-encoded.
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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.