- A
They store keys in Cloud HSM, which ensures keys never leave the HSM and are bound to a specific project
Cloud HSM provides hardware-level protection; keys cannot be exported and are protected against unauthorized access by Google personnel.
- B
They use customer-supplied encryption keys (CSEK), so Google never has access to keys
Why wrong: CSEK requires the customer to supply keys with each API call; keys are not stored in Google, but operational complexity may not meet all PCI DSS key management requirements.
- C
They use Cloud KMS with CMEK, and the keys are encrypted using Google-managed key encryption keys (KEKs)
Why wrong: CMEK keys are stored in Cloud KMS, which uses Google-managed KEKs. This does not fully prevent Google personnel from accessing keys if authorized.
- D
They enabled Access Approval, so Google must obtain approval before accessing keys
Why wrong: Access Approval applies to data access, not necessarily key access; it does not guarantee key export protection.
Quick Answer
The answer is that keys are protected by storing them in Cloud HSM, which ensures keys never leave the HSM and are bound to a specific project. This is correct because Cloud HSM provides a FIPS 140-2 Level 3 validated hardware security module where customer-managed encryption keys (CMEK) are generated and used exclusively within the HSM boundary, meaning the keys never exit the device in plaintext and access is strictly scoped to the authorized Google Cloud project, preventing even Google administrators from extracting or using them outside that context. On the Google Professional Cloud Security Engineer exam, this question tests your understanding of how Cloud HSM addresses PCI DSS requirements for key isolation and tamper resistance, often appearing as a trap where candidates confuse Cloud KMS software-backed keys with HSM-backed keys—remember that only Cloud HSM guarantees physical key separation from Google. A useful memory tip is "HSM: Hardware Secures Keys, Meaning Google can't peek."
PCSE Supporting compliance requirements Practice Question
This PCSE practice question tests your understanding of supporting compliance requirements. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 handling credit card information must comply with PCI DSS. They use Cloud KMS with CMEK keys stored in a key ring. During a compliance audit, the auditor asks how keys are protected against unauthorized use by Google. What should the company explain?
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
They store keys in Cloud HSM, which ensures keys never leave the HSM and are bound to a specific project
Option A is correct because Cloud HSM provides a FIPS 140-2 Level 3 validated hardware security module (HSM) where customer-managed encryption keys (CMEK) are generated and used exclusively within the HSM boundary. The keys never leave the HSM in plaintext, and access is bound to the specific Google Cloud project, ensuring that even Google administrators cannot extract or use the keys outside the authorized project context.
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.
- ✓
They store keys in Cloud HSM, which ensures keys never leave the HSM and are bound to a specific project
Why this is correct
Cloud HSM provides hardware-level protection; keys cannot be exported and are protected against unauthorized access by Google personnel.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
They use customer-supplied encryption keys (CSEK), so Google never has access to keys
Why it's wrong here
CSEK requires the customer to supply keys with each API call; keys are not stored in Google, but operational complexity may not meet all PCI DSS key management requirements.
- ✗
They use Cloud KMS with CMEK, and the keys are encrypted using Google-managed key encryption keys (KEKs)
Why it's wrong here
CMEK keys are stored in Cloud KMS, which uses Google-managed KEKs. This does not fully prevent Google personnel from accessing keys if authorized.
- ✗
They enabled Access Approval, so Google must obtain approval before accessing keys
Why it's wrong here
Access Approval applies to data access, not necessarily key access; it does not guarantee key export protection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Google Cloud often tests the distinction between key storage (Cloud HSM) and key management (Cloud KMS with CMEK), where candidates mistakenly believe that CMEK alone prevents Google access, when in fact only Cloud HSM provides hardware-level isolation that prevents Google from using the keys.
Detailed technical explanation
How to think about this question
Cloud HSM uses a cluster of FIPS 140-2 Level 3 HSMs that are partitioned per project, with each partition having its own master key. When a CMEK key is created in Cloud HSM, the key material is generated inside the HSM and never exported in plaintext; all cryptographic operations (encrypt, decrypt, sign) are performed within the HSM. This ensures that even if Google's infrastructure is compromised, the key material remains protected by the HSM's physical and logical security boundaries, and access is strictly controlled via IAM and the HSM's project binding.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this PCSE question test?
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: They store keys in Cloud HSM, which ensures keys never leave the HSM and are bound to a specific project — Option A is correct because Cloud HSM provides a FIPS 140-2 Level 3 validated hardware security module (HSM) where customer-managed encryption keys (CMEK) are generated and used exclusively within the HSM boundary. The keys never leave the HSM in plaintext, and access is bound to the specific Google Cloud project, ensuring that even Google administrators cannot extract or use the keys outside the authorized project context.
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.
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Last reviewed: Jun 30, 2026
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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