- A
aws:SecureTransport
This condition ensures the request is made over SSL/TLS.
- B
aws:SourceIp
Why wrong: This condition checks the source IP, not encryption.
- C
s3:x-amz-server-side-encryption
Why wrong: This condition checks encryption at rest, not in transit.
- D
aws:UserAgent
Why wrong: This condition checks the user agent, not encryption.
Question 1,171 of 1,748
S3 Encryption in Transit with Bucket Policy
This SCS-C02 practice question tests your understanding of infrastructure security. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
A company has an Amazon S3 bucket that stores sensitive data. The security team needs to ensure that all access to the bucket is encrypted in transit. Which condition should be added to the 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
✓
aws:SecureTransport
Option A is correct because the `aws:SecureTransport` condition key in an S3 bucket policy enforces that all requests to the bucket must be made over HTTPS (TLS). When set to `false`, any HTTP request is denied, ensuring data is encrypted in transit. This directly addresses the security team's requirement to encrypt all access to the bucket during transmission.
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.
- ✓
aws:SecureTransport
Why this is correct
This condition ensures the request is made over SSL/TLS.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
aws:SourceIp
Why it's wrong here
This condition checks the source IP, not encryption.
- ✗
s3:x-amz-server-side-encryption
Why it's wrong here
This condition checks encryption at rest, not in transit.
- ✗
aws:UserAgent
Why it's wrong here
This condition checks the user agent, not encryption.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse encryption in transit (HTTPS/TLS) with encryption at rest (server-side encryption), leading them to select `s3:x-amz-server-side-encryption` instead of `aws:SecureTransport`.
Detailed technical explanation
How to think about this question
The `aws:SecureTransport` condition evaluates the `TLS` version and cipher suite used for the HTTPS connection; if a request arrives over plain HTTP (port 80), the condition fails and the request is denied. This is implemented via a bucket policy statement with `"Condition": {"Bool": {"aws:SecureTransport": "false"}}` to explicitly deny non-HTTPS traffic. In practice, this is often combined with a `Deny` effect to block any HTTP access while allowing HTTPS via a separate `Allow` statement.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
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 |
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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Infrastructure Security — study guide chapter
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FAQ
Questions learners often ask
What does this SCS-C02 question test?
Infrastructure Security — This question tests Infrastructure Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: aws:SecureTransport — Option A is correct because the `aws:SecureTransport` condition key in an S3 bucket policy enforces that all requests to the bucket must be made over HTTPS (TLS). When set to `false`, any HTTP request is denied, ensuring data is encrypted in transit. This directly addresses the security team's requirement to encrypt all access to the bucket during transmission.
What should I do if I get this SCS-C02 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.
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 →
Same concept, more angles
2 more ways this is tested on SCS-C02
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A company has an Amazon S3 bucket that stores sensitive data. The security team wants to ensure that all access to the bucket is made only via HTTPS. Which policy should be used?
medium- A.Enable CloudFront with HTTPS-only viewer protocol policy.
- B.Use a VPC endpoint for S3 with a bucket policy that restricts access to the VPC endpoint.
- C.Enable 'Block public access' on the bucket.
- ✓ D.Add a bucket policy that denies access when aws:SecureTransport is false.
Why D: Option D is correct because the condition `aws:SecureTransport` evaluates to `false` when the request is made over HTTP instead of HTTPS. By adding a bucket policy that denies all S3 actions when `aws:SecureTransport` is `false`, the company enforces HTTPS-only access at the policy level, regardless of how the request originates.
Variation 2. A company wants to ensure that all traffic to an Amazon S3 bucket is encrypted in transit. Which bucket policy condition should be used?
easy- A.aws:SourceVpce
- ✓ B.aws:SecureTransport
- C.s3:x-amz-server-side-encryption
- D.aws:SourceIp
Why B: The `aws:SecureTransport` condition key checks whether the request was sent using SSL/TLS (i.e., HTTPS). Setting it to `false` in a deny statement ensures that any HTTP request to the S3 bucket is rejected, thereby enforcing encryption in transit. This is the correct condition for the stated requirement.
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Last reviewed: Jul 4, 2026
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