- A
Use AWS KMS to encrypt the secrets and include the ciphertext in the template.
Why wrong: The ciphertext is still visible and can be decrypted by anyone with KMS permissions.
- B
Use AWS Systems Manager Parameter Store or AWS Secrets Manager with dynamic references in the template.
Dynamic references allow CloudFormation to retrieve secrets at runtime without exposing them.
- C
Store the secrets in an encrypted S3 bucket and include the S3 URL in the template.
Why wrong: The URL might be visible and accessing the bucket requires permissions; better to use Parameter Store.
- D
Pass the secrets as plaintext parameters to the stack at launch time.
Why wrong: Secrets in plaintext can be seen in CloudFormation console logs.
Question 322 of 1,748
Handle Secrets Securely in CloudFormation Templates
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 uses AWS CloudFormation to deploy infrastructure. The security team wants to ensure that no sensitive data, such as database passwords, is exposed in plaintext in the CloudFormation templates. What is the MOST secure way to handle secrets?
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
✓
Use AWS Systems Manager Parameter Store or AWS Secrets Manager with dynamic references in the template.
Option B is correct because AWS Systems Manager Parameter Store and AWS Secrets Manager support dynamic references in CloudFormation templates, allowing you to reference secret values without exposing them in plaintext. CloudFormation resolves these references at deployment time, retrieving the actual secret value from the secure store, and never stores the secret in the template or stack metadata. This approach ensures secrets are managed, rotated, and audited centrally, adhering to security best practices.
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.
- ✗
Use AWS KMS to encrypt the secrets and include the ciphertext in the template.
Why it's wrong here
The ciphertext is still visible and can be decrypted by anyone with KMS permissions.
- ✓
Use AWS Systems Manager Parameter Store or AWS Secrets Manager with dynamic references in the template.
Why this is correct
Dynamic references allow CloudFormation to retrieve secrets at runtime without exposing them.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Store the secrets in an encrypted S3 bucket and include the S3 URL in the template.
Why it's wrong here
The URL might be visible and accessing the bucket requires permissions; better to use Parameter Store.
- ✗
Pass the secrets as plaintext parameters to the stack at launch time.
Why it's wrong here
Secrets in plaintext can be seen in CloudFormation console logs.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think encrypting the secret with KMS (Option A) or storing it in an encrypted S3 bucket (Option C) is sufficient, but they overlook that the encrypted data or reference URL is still exposed in the template, and the decryption key or bucket access must be managed separately, which is less secure than using a dedicated secrets service with dynamic references.
Detailed technical explanation
How to think about this question
Dynamic references in CloudFormation use the `resolve:ssm` or `resolve:secretsmanager` syntax, which instructs the CloudFormation service to call the AWS SSM or Secrets Manager API during stack creation or update to retrieve the secret value. The retrieved value is used only in memory and is not stored in the template or stack metadata, ensuring it never appears in logs or the AWS Management Console. This mechanism also supports cross-account secret references and automatic rotation, making it ideal for production environments where secrets must be rotated frequently.
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.
Visual reference
What to study next
Got this wrong? Here's your next step.
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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: Use AWS Systems Manager Parameter Store or AWS Secrets Manager with dynamic references in the template. — Option B is correct because AWS Systems Manager Parameter Store and AWS Secrets Manager support dynamic references in CloudFormation templates, allowing you to reference secret values without exposing them in plaintext. CloudFormation resolves these references at deployment time, retrieving the actual secret value from the secure store, and never stores the secret in the template or stack metadata. This approach ensures secrets are managed, rotated, and audited centrally, adhering to security best practices.
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.
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Last reviewed: Jul 4, 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.
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