The correct solution is to use Cloud Key Management Service (Cloud KMS) with CMEK and enable key rotation. This approach directly satisfies the healthcare organization’s need for CMEK with Cloud Storage key rotation compliance because Cloud KMS allows you to centrally manage and rotate customer-managed encryption keys while Cloud Storage automatically encrypts all data at rest using the specified key. On the Google Professional Cloud Security Engineer exam, this scenario tests your understanding of how Cloud KMS integrates with Cloud Storage to enforce encryption policies, and a common trap is assuming that Google-managed keys or default encryption meet HIPAA’s requirement for customer control. Remember that CMEK gives you ownership of the key material, and enabling rotation ensures compliance with periodic key change mandates. Memory tip: “CMEK + KMS = Compliance with Control” — the key is in the name: Customer-Managed means you manage the rotation.
PCSE Supporting compliance requirements Practice Question
This PCSE practice question tests your understanding of supporting compliance requirements. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 healthcare organization is migrating to Google Cloud and needs to ensure that all data stored in Cloud Storage is encrypted at rest with customer-managed encryption keys (CMEK) to meet HIPAA requirements. The security team wants to centrally manage key rotation and access. Which solution should they implement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Use Cloud Key Management Service (Cloud KMS) with CMEK and enable key rotation.
Option C is correct because Cloud KMS with CMEK allows the organization to centrally manage encryption keys, including automated key rotation, while maintaining customer control over the keys used to encrypt Cloud Storage data. This meets HIPAA requirements for encryption at rest with customer-managed keys, as Cloud KMS integrates directly with Cloud Storage to enforce encryption using the specified key.
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 Cloud Data Loss Prevention (DLP) to de-identify data before storing.
Why it's wrong here
DLP does not handle encryption at rest; it's for data masking and discovery.
✗
Use Cloud Hardware Security Module (Cloud HSM) with CMEK.
Why it's wrong here
Cloud HSM is an option but not strictly required; Cloud KMS without HSM can also meet HIPAA if properly configured.
✓
Use Cloud Key Management Service (Cloud KMS) with CMEK and enable key rotation.
Why this is correct
Cloud KMS provides centralized key management, rotation, and integrates with Cloud Storage for CMEK.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use customer-supplied encryption keys (CSEK) stored in Cloud Storage.
Why it's wrong here
CSEK requires key management outside GCP, which adds complexity and may not meet centralized control requirements.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse Cloud HSM with Cloud KMS, thinking that HSM is required for HIPAA compliance, but Cloud KMS with CMEK alone satisfies the requirement for customer-managed keys and key rotation without the added cost and complexity of HSM.
Detailed technical explanation
How to think about this question
Cloud KMS with CMEK uses envelope encryption: a Cloud KMS-managed key encrypts a data encryption key (DEK), which then encrypts the data. Key rotation in Cloud KMS creates a new key version, but existing data encrypted with the old key version remains decryptable because Cloud KMS retains old versions; this is critical for compliance scenarios where data must remain accessible after rotation. In a real-world HIPAA audit, the ability to log and audit key access via Cloud Audit Logs is essential, and Cloud KMS provides this natively.
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.
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.
Supporting compliance requirements — This question tests Supporting compliance requirements — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Use Cloud Key Management Service (Cloud KMS) with CMEK and enable key rotation. — Option C is correct because Cloud KMS with CMEK allows the organization to centrally manage encryption keys, including automated key rotation, while maintaining customer control over the keys used to encrypt Cloud Storage data. This meets HIPAA requirements for encryption at rest with customer-managed keys, as Cloud KMS integrates directly with Cloud Storage to enforce encryption using the specified key.
What should I do if I get this PCSE 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
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Variation 1. Which TWO configurations are required to use Customer-Managed Encryption Keys (CMEK) with Cloud Storage to meet a compliance requirement that keys must be rotated every 30 days? (Choose two.)
medium
A.Set a key destruction policy to prevent accidental deletion of the key.
B.Use Cloud External Key Manager (EKM) to manage the key externally.
✓ C.Create a Cloud KMS key ring and key with a rotation period of 30 days.
D.Use a Cloud HSM key with protection level HSM to meet key storage requirements.
✓ E.Grant the Cloud Storage service account the Cloud KMS CryptoKey Encrypter/Decrypter role on the key.
Why C: Option C is correct because Cloud KMS allows you to set a rotation period on a key, and when you use a CMEK with Cloud Storage, the key is used to encrypt the data encryption keys (DEKs). Setting a rotation period of 30 days ensures that the key material is automatically rotated every 30 days, meeting the compliance requirement. Option E is correct because the Cloud Storage service account must be granted the Cloud KMS CryptoKey Encrypter/Decrypter role to be authorized to use the CMEK for encrypting and decrypting objects.
Last reviewed: Jun 25, 2026
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This PCSE practice question is part of Courseiva's free Google Cloud 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 PCSE exam.
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