Quick Answer
The answer is to use AWS KMS for encryption and CloudTrail log file integrity validation for verification. AWS KMS enables server-side encryption (SSE-KMS) for CloudTrail logs at rest, ensuring that all log data is encrypted using a customer-managed key before being stored in S3. CloudTrail’s built-in log file integrity validation uses SHA-256 hashing and RSA-based digital signatures to create digest files, allowing you to independently confirm that logs have not been altered, deleted, or tampered with after delivery. On the AWS Certified Security Specialty SCS-C02 exam, this pairing tests your understanding of defense-in-depth for audit logs—a common trap is confusing S3 default encryption (SSE-S3) with KMS, or assuming CloudTrail itself handles encryption. Remember the mnemonic: “KMS locks the box, validation checks the seal.”
This SCS-C02 practice question tests your understanding of data protection. 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 uses AWS CloudTrail to log API calls. They want to ensure that log files are encrypted at rest and that integrity is verified. Which TWO services can be used together to achieve this?
S3 Inventory
Why wrong: Lists objects, not encryption or integrity.
AWS CloudHSM
Why wrong: Can provide keys but not directly integrated with CloudTrail for encryption.
CloudTrail log file integrity validation
Verifies log files have not been tampered.
AWS KMS to encrypt the log files
SSE-KMS encryption.
S3 MFA Delete
Why wrong: Prevents accidental deletion, not encryption or integrity.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
CloudTrail log file integrity validation
CloudTrail log file integrity validation (option C) provides a built-in mechanism to verify that log files have not been modified, deleted, or tampered with after delivery. It uses SHA-256 hashing and digital signatures (based on RSA) to create a digest file that can be independently validated. AWS KMS (option D) allows you to encrypt CloudTrail log files at rest using server-side encryption (SSE-KMS), ensuring that the logs are stored in an encrypted format. Together, they meet both the encryption-at-rest and integrity verification requirements.
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.
S3 Inventory
Why it's wrong here
Lists objects, not encryption or integrity.
AWS CloudHSM
Why it's wrong here
Can provide keys but not directly integrated with CloudTrail for encryption.
CloudTrail log file integrity validation
Why this is correct
Verifies log files have not been tampered.
Related concept
Read the scenario before looking for a memorised answer.
AWS KMS to encrypt the log files
Why this is correct
SSE-KMS encryption.
Related concept
Read the scenario before looking for a memorised answer.
S3 MFA Delete
Why it's wrong here
Prevents accidental deletion, not encryption or integrity.
Common exam traps
The trap here is that candidates often confuse AWS CloudHSM with AWS KMS, thinking CloudHSM can directly encrypt CloudTrail logs, but CloudTrail only supports encryption via S3-managed keys (SSE-S3) or KMS keys (SSE-KMS), not CloudHSM, and integrity validation is a separate built-in feature of CloudTrail itself.
Detailed technical explanation
CloudTrail log file integrity validation works by creating a digest file every hour (or more frequently) that contains references to the log files, their SHA-256 hashes, and a digital signature signed with a private key from a public/private key pair managed by AWS. The digest files are stored in the same S3 bucket as the logs, and you can validate them using the AWS CLI or SDK by downloading the public key from the AWS CloudTrail public key endpoint. A subtle behavior is that if you enable KMS encryption on the same bucket, the digest files are also encrypted, but the integrity validation process still works because it operates on the unencrypted content before encryption.
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: CloudTrail log file integrity validation — CloudTrail log file integrity validation (option C) provides a built-in mechanism to verify that log files have not been modified, deleted, or tampered with after delivery. It uses SHA-256 hashing and digital signatures (based on RSA) to create a digest file that can be independently validated. AWS KMS (option D) allows you to encrypt CloudTrail log files at rest using server-side encryption (SSE-KMS), ensuring that the logs are stored in an encrypted format. Together, they meet both the encryption-at-rest and integrity verification requirements.
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.