CCSP Cloud Data Security Practice Question
A company is moving its data to the cloud and must ensure that all data at rest is encrypted using keys that are generated and managed on-premises, with the cloud provider having no access to the keys. Which encryption method should be used?
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
✓
Customer-Supplied Encryption Keys (CSEK)
Customer-supplied encryption keys (CSEK) allow the customer to generate and manage keys outside the cloud, giving the maximum control and ensuring the cloud provider cannot access the keys.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Bring Your Own Key (BYOK)
Why it's wrong here
BYOK keys are imported into the cloud KMS, so the provider may have access.
- ✗
Customer-Managed Encryption Keys (CMEK)
Why it's wrong here
CMEK uses keys created in the cloud KMS, which the cloud provider can still access.
- ✗
AES-256 Server-Side Encryption
Why it's wrong here
This is a cloud provider default encryption where the provider manages the keys.
- ✓
Customer-Supplied Encryption Keys (CSEK)
Why this is correct
CSEK involves the customer supplying their own keys, and the cloud provider does not have access to them.
Go deeper
Related to this question
About these practice questions
One of 964 original CCSP practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.