- A
Server-Side Encryption with Customer-Provided Keys (SSE-C).
Why wrong: SSE-C requires the key to be provided with each request, not stored in on-premises HSM.
- B
Client-Side Encryption using the company's own encryption library.
Client-side encryption allows the company to encrypt data with their own key before uploading to S3.
- C
Server-Side Encryption with AWS KMS (SSE-KMS).
Why wrong: SSE-KMS uses AWS KMS, not on-premises HSM.
- D
Server-Side Encryption with S3-Managed Keys (SSE-S3).
Why wrong: SSE-S3 uses AWS-managed keys, not customer's own HSM.
Question 1,718 of 1,746
SAP-C02 Client-Side Encryption Practice Question
This SAP-C02 practice question tests your understanding of continuous improvement for existing solutions. 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. A key principle to apply: client-Side Encryption. 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 stores sensitive data in Amazon S3. They need to ensure that data is encrypted at rest using a key managed by the company's on-premises hardware security module (HSM). Which S3 encryption option should they use?
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
✓
Client-Side Encryption using the company's own encryption library.
Client-Side Encryption (B) allows the company to encrypt the data locally using their own encryption keys from the on-premises HSM before uploading to S3. This ensures the HSM manages the key and the company retains full control. Option A (SSE-C) requires the customer to provide a key with each request, but the key is not managed by the on-premises HSM; it is provided per-request and S3 uses it for encryption/decryption. Option C (SSE-KMS) uses AWS KMS, not the company's HSM. Option D (SSE-S3) uses S3-managed keys, which also do not involve the on-premises HSM.
Key principle: Client-Side 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.
- ✗
Server-Side Encryption with Customer-Provided Keys (SSE-C).
Why it's wrong here
SSE-C requires the key to be provided with each request, not stored in on-premises HSM.
- ✓
Client-Side Encryption using the company's own encryption library.
Why this is correct
Client-side encryption allows the company to encrypt data with their own key before uploading to S3.
Related concept
Client-Side Encryption
- ✗
Server-Side Encryption with AWS KMS (SSE-KMS).
Why it's wrong here
SSE-KMS uses AWS KMS, not on-premises HSM.
- ✗
Server-Side Encryption with S3-Managed Keys (SSE-S3).
Why it's wrong here
SSE-S3 uses AWS-managed keys, not customer's own HSM.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
Treat this as a scenario question. Identify the problem, the constraint, and the best action. Then compare each option against those facts.
KKey Concepts to Remember
- Client-Side Encryption
- SSE-C
- SSE-KMS
- SSE-S3
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
Client-Side Encryption
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.
Review client-Side Encryption, then practise related SAP-C02 questions on the same topic to reinforce the concept.
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Continuous Improvement for Existing Solutions — study guide chapter
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FAQ
Questions learners often ask
What does this SAP-C02 question test?
Continuous Improvement for Existing Solutions — This question tests Continuous Improvement for Existing Solutions — Client-Side Encryption.
What is the correct answer to this question?
The correct answer is: Client-Side Encryption using the company's own encryption library. — Client-Side Encryption (B) allows the company to encrypt the data locally using their own encryption keys from the on-premises HSM before uploading to S3. This ensures the HSM manages the key and the company retains full control. Option A (SSE-C) requires the customer to provide a key with each request, but the key is not managed by the on-premises HSM; it is provided per-request and S3 uses it for encryption/decryption. Option C (SSE-KMS) uses AWS KMS, not the company's HSM. Option D (SSE-S3) uses S3-managed keys, which also do not involve the on-premises HSM.
What should I do if I get this SAP-C02 question wrong?
Review client-Side Encryption, then practise related SAP-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
Client-Side Encryption
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Last reviewed: Jun 20, 2026
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