Quick Answer
The correct answer is a key policy with a condition for allowed regions. This works because you can attach a policy to the KMS key itself that includes a condition block using the `kms:CallerRegion` or `aws:RequestRegion` key, which evaluates the geographic origin of every API call. If a request to perform a cryptographic operation like Encrypt or Decrypt comes from outside the specified region, the policy explicitly denies it, enforcing regional data sovereignty. On the Certified Cloud Security Professional CCSP exam, this scenario tests your understanding of resource-based policies versus IAM policies, and a common trap is confusing a global IAM policy with a key-specific condition—remember that only a key policy can restrict the key’s own usage per region. A helpful memory tip is “key policy, key region”: the condition must live on the key itself to lock it to a location.
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 company uses a cloud key management service (KMS) and wants to ensure that keys can be used only within a specific geographic region. Which of the following should be configured?
VPC endpoint for KMS
Why wrong: VPC endpoint allows private connectivity but does not restrict region usage.
CloudTrail logging
Why wrong: CloudTrail logs API calls but does not enforce restrictions.
Key policy with a condition for allowed regions
Key policies with conditions can restrict use to specific regions.
Key rotation policy
Why wrong: Rotation policy defines frequency, not regional restriction.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Key policy with a condition for allowed regions
Option C is correct because a key policy with a condition using the `kms:CallerRegion` or `aws:RequestRegion` condition key can explicitly restrict the geographic region where the KMS key can be used. This ensures that any cryptographic operation (e.g., Encrypt, Decrypt) attempted from an unauthorized region is denied, enforcing regional data sovereignty 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.
VPC endpoint for KMS
Why it's wrong here
VPC endpoint allows private connectivity but does not restrict region usage.
CloudTrail logging
Why it's wrong here
CloudTrail logs API calls but does not enforce restrictions.
Key policy with a condition for allowed regions
Why this is correct
Key policies with conditions can restrict use to specific regions.
Related concept
Read the scenario before looking for a memorised answer.
Key rotation policy
Why it's wrong here
Rotation policy defines frequency, not regional restriction.
Common exam traps
ISC2 often tests the distinction between network-level controls (like VPC endpoints) and policy-level controls (like key policy conditions), leading candidates to mistakenly choose VPC endpoints for geographic restrictions when only a condition-based policy can enforce regional key usage.
Detailed technical explanation
Under the hood, AWS KMS key policies are resource-based policies that support condition keys like `aws:RequestRegion` (which evaluates the AWS region of the API endpoint) and `kms:CallerRegion` (which evaluates the region of the caller's credentials). For example, a policy condition `StringEquals: aws:RequestRegion: us-east-1` ensures that only requests sent to the us-east-1 endpoint are allowed. This is critical for compliance with data residency laws (e.g., GDPR) where cryptographic operations must remain within a specific jurisdiction.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Cloud Data Security — This question tests Cloud Data Security — Read the scenario before looking for a memorised answer..
The correct answer is: Key policy with a condition for allowed regions — Option C is correct because a key policy with a condition using the `kms:CallerRegion` or `aws:RequestRegion` condition key can explicitly restrict the geographic region where the KMS key can be used. This ensures that any cryptographic operation (e.g., Encrypt, Decrypt) attempted from an unauthorized region is denied, enforcing regional data sovereignty 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.
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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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