Question 1,452 of 1,711
DEA-C01 Data Store Management Practice Question
A company stores sensitive customer data in Amazon S3. The security team requires that all objects be encrypted at rest using server-side encryption with customer-provided keys (SSE-C). Which bucket policy condition will enforce this requirement?
⚠ Common exam trap
AWS often tests the distinction between condition keys that enforce the encryption method (SSE-S3, SSE-KMS, SSE-C) versus those that enforce specific parameters like the key ID or algorithm, leading candidates to confuse `s3:x-amz-server-side-encryption-customer-algorithm` with the key requirement.
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
✓
s3:x-amz-server-side-encryption-customer-key
The condition key `s3:x-amz-server-side-encryption-customer-key` is specifically used to enforce that objects uploaded to S3 must use server-side encryption with customer-provided keys (SSE-C). This condition key checks for the presence of the `x-amz-server-side-encryption-customer-key` header in the request, which is required for SSE-C encryption. Without this header, the request is denied, ensuring all objects are encrypted at rest using customer-provided keys.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
s3:x-amz-server-side-encryption-aws-kms-key-id
Why it's wrong here
This condition is for SSE-KMS, not SSE-C.
- ✗
s3:x-amz-server-side-encryption
Why it's wrong here
This condition key is used for SSE-S3 or SSE-KMS, not SSE-C.
- ✓
s3:x-amz-server-side-encryption-customer-key
Why this is correct
This condition key enforces the use of a customer-provided encryption key.
- ✗
s3:x-amz-server-side-encryption-customer-algorithm
Why it's wrong here
While related, the condition to enforce SSE-C typically uses the customer-key header.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Last reviewed: Jun 30, 2026
This DEA-C01 practice question is part of Courseiva's free Amazon Web Services 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 DEA-C01 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.