Quick Answer
The correct answer is SSE-S3 and SSE-KMS, as both are valid options for encrypting data at rest in Amazon S3. SSE-S3 provides server-side encryption where Amazon S3 manages the encryption keys entirely, using AES-256 to encrypt objects before writing them to disk and decrypting them on access—requiring only the `x-amz-server-side-encryption: AES256` header. SSE-KMS, on the other hand, offers separate key management through AWS Key Management Service, allowing you to control key rotation, auditing, and access policies. On the AWS Certified Security Specialty SCS-C02 exam, this question tests your understanding of the distinction between S3-managed keys and customer-managed KMS keys; a common trap is confusing SSE-C (customer-provided keys) with SSE-KMS, or assuming client-side encryption qualifies as an S3 encryption option. Remember the memory tip: “S3 handles the key for SSE-S3, you handle the key for SSE-KMS, and you bring the key for SSE-C.”
This SCS-C02 practice question tests your understanding of data protection. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
Which TWO of the following are valid options for encrypting data at rest in Amazon S3? (Choose 2.)
SSL/TLS encryption
Why wrong: Wrong: SSL/TLS is for data in transit, not at rest.
IAM policy encryption
Why wrong: Wrong: IAM policies do not encrypt data.
SSE-S3
Correct: Server-side encryption with Amazon S3-managed keys.
CloudHSM client-side encryption
Why wrong: Wrong: CloudHSM is not a direct S3 encryption option.
SSE-KMS
Correct: Server-side encryption with AWS KMS-managed keys.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
SSE-S3
SSE-S3 is correct because it provides server-side encryption where Amazon S3 manages the encryption keys entirely. When you upload an object, S3 encrypts it using AES-256 before writing to disk and decrypts it when you access it, with no additional configuration needed beyond enabling the header `x-amz-server-side-encryption: AES256`.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
SSL/TLS encryption
IAM policy encryption
Why it's wrong here
Wrong: IAM policies do not encrypt data.
SSE-S3
Why this is correct
Correct: Server-side encryption with Amazon S3-managed keys.
Related concept
Read the scenario before looking for a memorised answer.
CloudHSM client-side encryption
Why it's wrong here
Wrong: CloudHSM is not a direct S3 encryption option.
SSE-KMS
Why this is correct
Correct: Server-side encryption with AWS KMS-managed keys.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is confusing encryption at rest with encryption in transit, leading candidates to select SSL/TLS, or misinterpreting IAM policies as an encryption mechanism, or assuming CloudHSM is a native S3 server-side encryption option rather than a client-side tool.
Detailed technical explanation
SSE-KMS uses AWS KMS to manage keys, allowing separate permissions for key usage and audit trails via CloudTrail. Under the hood, when you specify `x-amz-server-side-encryption: aws:kms`, S3 requests a data key from KMS, encrypts the object with that key, and stores the encrypted data key alongside the object; this enables envelope encryption and key rotation without re-encrypting data.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Data Protection — study guide chapter
Learn the concepts, then practise the questions
Data Protection practice questions
Targeted practice on this topic area only
All SCS-C02 questions
1,738 questions across all exam domains
AWS Certified Security Specialty SCS-C02 study guide
Full concept coverage aligned to exam objectives
SCS-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise SCS-C02 questions linked to Threat Detection and Incident Response.
Practise SCS-C02 questions linked to Security Logging and Monitoring.
Practise SCS-C02 questions linked to Identity and Access Management.
Practise SCS-C02 questions linked to Management and Security Governance.
Practise SCS-C02 questions linked to Infrastructure Security.
Practise SCS-C02 questions linked to Data Protection.
Practise SCS-C02 questions linked to SCS-C02 fundamentals.
Practise SCS-C02 questions linked to SCS-C02 scenario.
Practise SCS-C02 questions linked to SCS-C02 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Data Protection — This question tests Data Protection — Read the scenario before looking for a memorised answer..
The correct answer is: SSE-S3 — SSE-S3 is correct because it provides server-side encryption where Amazon S3 manages the encryption keys entirely. When you upload an object, S3 encrypts it using AES-256 before writing to disk and decrypts it when you access it, with no additional configuration needed beyond enabling the header `x-amz-server-side-encryption: AES256`.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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 →
Last reviewed: Jun 24, 2026
This SCS-C02 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 SCS-C02 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.