DEA-C01 Data Security and Governance Practice Question
A company wants to ensure that only encrypted connections are used when data is transferred to S3. Which policy condition should be used in an S3 bucket policy?
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
✓
Condition: { Bool: { aws:SecureTransport: false } }
The condition `aws:SecureTransport: false` is used to deny requests that are not sent over SSL/TLS, ensuring encrypted connections for data transfer to S3. Option A (`s3:x-amz-server-side-encryption`) controls encryption at rest, not in transit. Option B (`s3:signatureversion`) checks the signature version used for request authentication, not encryption. Option C (`aws:SourceIp`) filters by source IP address, which is unrelated to encryption.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Condition: { Null: { s3:x-amz-server-side-encryption: true } }
Why it's wrong here
This checks encryption at rest, not in transit.
- ✗
Condition: { StringEquals: { s3:signatureversion: ["AWS4-HMAC-SHA256"] } }
Why it's wrong here
This checks Signature Version 4, not encryption in transit.
- ✗
Condition: { StringNotEquals: { aws:SourceIp: ["0.0.0.0/0"] } }
Why it's wrong here
This condition checks IP, not encryption in transit.
- ✓
Condition: { Bool: { aws:SecureTransport: false } }
Why this is correct
Denying requests where SecureTransport is false enforces HTTPS.
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 |
Go deeper
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.