- A
Hold your own key (HYOK)
Why wrong: HYOK keys remain on-premises and are not managed in cloud KMS for service access.
- B
Bring your own key (BYOK)
BYOK keys are managed in cloud KMS and access can be controlled.
- C
Customer-supplied keys (CSEK)
Why wrong: CSEK keys are supplied per operation and not stored in KMS for ongoing use.
- D
Customer-managed keys (CMEK)
CMEK gives the customer control over key access.
- E
Cloud provider-managed keys
Why wrong: Provider-managed keys do not allow customer revocation.
Question 350 of 1,000
CCSP Cloud Data Security Practice Question
This CCSP practice question tests your understanding of cloud data 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 a cloud KMS with HSM-backed keys for regulatory compliance. They need to allow a cloud service to use a key for encryption while retaining the ability to revoke access at any time. Which TWO key management models satisfy this? (Choose two.)
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
✓
Bring your own key (BYOK)
BYOK is correct because it allows the customer to import their own key material into the cloud KMS, which is backed by an HSM, and the customer retains full control over the key's lifecycle, including the ability to revoke access at any time by disabling or deleting the key. CMEK is correct because it gives the customer direct management of the key (e.g., rotation, disabling, deletion) within the cloud KMS, while the HSM provides hardware-level protection, and the customer can revoke the cloud service's access by modifying key permissions or disabling the 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.
- ✗
Hold your own key (HYOK)
Why it's wrong here
HYOK keys remain on-premises and are not managed in cloud KMS for service access.
- ✓
Bring your own key (BYOK)
Why this is correct
BYOK keys are managed in cloud KMS and access can be controlled.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Customer-supplied keys (CSEK)
Why it's wrong here
CSEK keys are supplied per operation and not stored in KMS for ongoing use.
- ✓
Customer-managed keys (CMEK)
Why this is correct
CMEK gives the customer control over key access.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Cloud provider-managed keys
Why it's wrong here
Provider-managed keys do not allow customer revocation.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between BYOK and HYOK, where candidates mistakenly think HYOK allows cloud service usage, but HYOK actually keeps the key on-premises and only provides a proxy or token, not direct cloud KMS integration.
Detailed technical explanation
How to think about this question
In BYOK, the customer generates key material locally (e.g., using an HSM or software) and imports it into the cloud KMS via a secure wrapping mechanism (e.g., using RSA-OAEP or AES key wrapping per RFC 5649), where it is stored in an HSM-bound key store. For CMEK, the customer creates the key directly in the cloud KMS (e.g., using AWS KMS or GCP Cloud KMS) and assigns IAM roles or policies to control which cloud services can use the key; revocation is immediate by removing the service account's permissions or disabling the key, which triggers a cascade of access denials for any ongoing operations.
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
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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: Bring your own key (BYOK) — BYOK is correct because it allows the customer to import their own key material into the cloud KMS, which is backed by an HSM, and the customer retains full control over the key's lifecycle, including the ability to revoke access at any time by disabling or deleting the key. CMEK is correct because it gives the customer direct management of the key (e.g., rotation, disabling, deletion) within the cloud KMS, while the HSM provides hardware-level protection, and the customer can revoke the cloud service's access by modifying key permissions or disabling the 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
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Last reviewed: Jul 4, 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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