- A
Re-establish synchronization between on-premises HSM and cloud key stores: update AWS KMS custom key store with correct key and fix Azure Key Vault access policies.
Correct: This directly resolves the key ID change and access policy issues, restoring compliance and availability.
- B
Implement client-side encryption for all data, bypassing cloud KMS.
Why wrong: Incorrect: Client-side encryption would require significant re-engineering and does not address the existing key issues.
- C
Switch S3 to use SSE-S3 and Azure SQL to use service-managed keys.
Why wrong: Incorrect: This does not resolve the current misconfiguration and violates policy.
- D
Roll back all encryption to use cloud-provided managed keys to simplify operations.
Why wrong: Incorrect: This violates the organization's requirement to use on-premises managed keys.
Quick Answer
The answer is to re-establish synchronization between the on-premises HSM and the cloud key stores by updating the AWS KMS custom key store with the correct key and fixing the Azure Key Vault access policies. This is correct because multi-cloud BYOK HSM key synchronization ensures that the same root key from your on-premises HSM is consistently mirrored across AWS CloudHSM and Azure Key Vault; when that synchronization breaks—due to a key ID change or a disabled key—encryption compliance and service availability fail simultaneously. On the CCSP exam, this scenario tests your understanding of how BYOK and HSM integration work across providers, often appearing as a trap where candidates focus on re-encrypting data instead of fixing the root synchronization issue. A common memory tip is to think of BYOK as a “single source of truth” from your HSM: if the cloud copies fall out of sync, fix the sync, not the data.
CCSP Cloud Data Security Practice Question
This CCSP practice question tests your understanding of cloud data security. 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.
A large e-commerce company uses a multi-cloud environment with workloads in AWS and Azure. They store customer payment data in an AWS S3 bucket and use Azure SQL Database for transactional data. The company requires that all data at rest be encrypted using keys managed by their on-premises HSM. They have implemented AWS KMS with custom key store (CloudHSM) for S3, and Azure SQL TDE with Azure Key Vault (using BYOK) for the database. Recently, the security team noticed that some S3 objects are not encrypted with the expected key, and there are intermittent access failures to the Azure SQL database. Investigation reveals that the AWS KMS key ID changed after a recent security incident, and the Azure Key Vault key has been disabled due to a misconfigured access policy. What is the most effective course of action to restore encryption compliance and service availability?
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
Re-establish synchronization between on-premises HSM and cloud key stores: update AWS KMS custom key store with correct key and fix Azure Key Vault access policies.
Option A is correct because the root cause is a loss of synchronization between the on-premises HSM and the cloud key stores. Updating the AWS KMS custom key store (CloudHSM) with the correct key restores S3 encryption compliance, while fixing the Azure Key Vault access policy re-enables the BYOK key for SQL TDE, restoring service availability. This directly addresses the specific failures: the changed KMS key ID and the disabled Key Vault 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.
- ✓
Re-establish synchronization between on-premises HSM and cloud key stores: update AWS KMS custom key store with correct key and fix Azure Key Vault access policies.
Why this is correct
Correct: This directly resolves the key ID change and access policy issues, restoring compliance and availability.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Implement client-side encryption for all data, bypassing cloud KMS.
Why it's wrong here
Incorrect: Client-side encryption would require significant re-engineering and does not address the existing key issues.
- ✗
Switch S3 to use SSE-S3 and Azure SQL to use service-managed keys.
Why it's wrong here
Incorrect: This does not resolve the current misconfiguration and violates policy.
- ✗
Roll back all encryption to use cloud-provided managed keys to simplify operations.
Why it's wrong here
Incorrect: This violates the organization's requirement to use on-premises managed keys.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the misconception that switching to simpler cloud-managed keys (SSE-S3 or service-managed) is a valid fix, but the trap is that this violates the explicit compliance requirement for on-premises HSM-managed keys, making such options non-compliant.
Detailed technical explanation
How to think about this question
AWS KMS custom key store (CloudHSM) uses a dedicated HSM cluster to generate and store keys, where the key material is never exposed to AWS; the key ID change indicates the HSM proxy or key reference was corrupted. Azure SQL TDE with BYOK in Key Vault uses a customer-managed key for the database encryption key (DEK) protector; when the key is disabled, the SQL Server cannot unwrap the DEK, causing intermittent access failures. Both issues stem from a loss of trust or synchronization with the on-premises HSM, requiring re-establishment of the key hierarchy.
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 developer is choosing between AES-256 (symmetric) and RSA-2048 (asymmetric) for encrypting a large file that will be sent to a partner. Symmetric encryption is fast but requires key exchange; asymmetric is slower but solves the key distribution problem. A hybrid approach — encrypt the file with AES, encrypt the AES key with RSA — is standard. Questions like this test whether you understand when each approach applies.
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.
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Cloud Data Security — study guide chapter
Learn the concepts, then practise the questions
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FAQ
Questions learners often ask
What does this CCSP question test?
Cloud Data Security — This question tests Cloud Data Security — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Re-establish synchronization between on-premises HSM and cloud key stores: update AWS KMS custom key store with correct key and fix Azure Key Vault access policies. — Option A is correct because the root cause is a loss of synchronization between the on-premises HSM and the cloud key stores. Updating the AWS KMS custom key store (CloudHSM) with the correct key restores S3 encryption compliance, while fixing the Azure Key Vault access policy re-enables the BYOK key for SQL TDE, restoring service availability. This directly addresses the specific failures: the changed KMS key ID and the disabled Key Vault key.
What should I do if I get this CCSP 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
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 →
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Last reviewed: Jun 30, 2026
This CCSP practice question is part of Courseiva's free ISC2 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 CCSP exam.
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