This CCSP practice question tests your understanding of cloud data security. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
An organization stores archival data in cloud cold storage and requires each customer's data to be encrypted with unique keys managed by the customer. Which encryption approach meets this requirement?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Client-side encryption
Client-side encryption ensures that data is encrypted before it is sent to the cloud, and the customer retains sole control over the encryption keys. This approach meets the requirement for each customer's data to be encrypted with unique keys managed by the customer, as the cloud provider never has access to the keys or the unencrypted data.
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.
✗
Server-side encryption with customer-managed keys (SSE-KMS)
Why it's wrong here
Keys are managed in the cloud, giving the provider potential access.
✗
Server-side encryption with cloud-provider keys (SSE-S3)
Why it's wrong here
Uses shared keys, not unique per customer.
✗
Server-side encryption with customer-provided keys (SSE-C)
Why it's wrong here
SSE-C requires the customer to send the key with each upload, which is inconvenient for archival.
✓
Client-side encryption
Why this is correct
Customer encrypts data before upload with their own keys, ensuring uniqueness and control.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
ISC2 often tests the distinction between where encryption occurs (client-side vs. server-side) and who manages the keys, leading candidates to mistakenly choose SSE-C because it involves customer-provided keys, even though the encryption still happens on the server side.
Detailed technical explanation
How to think about this question
Client-side encryption typically uses a library like AWS SDK's AmazonS3EncryptionClient or a tool like OpenPGP, where the encryption key is generated and stored locally by the customer. The data is encrypted using algorithms such as AES-256-GCM before being transmitted to the cloud, and the cloud provider stores only ciphertext, making it impossible for the provider to decrypt the data even if compelled by legal request. This approach is often required for regulatory compliance (e.g., HIPAA, PCI DSS) where the customer must maintain exclusive control over encryption keys.
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.
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: Client-side encryption — Client-side encryption ensures that data is encrypted before it is sent to the cloud, and the customer retains sole control over the encryption keys. This approach meets the requirement for each customer's data to be encrypted with unique keys managed by the customer, as the cloud provider never has access to the keys or the unencrypted data.
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.
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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.
Question Discussion
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