CISA Protection of Information Assets Practice Question
This CISA practice question tests your understanding of protection of information assets. 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 is migrating sensitive customer data to a public cloud. Which of the following encryption strategies provides the STRONGEST protection against data exposure to the cloud provider?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Implement client-side encryption with keys managed on-premises
Client-side encryption with keys managed on-premises ensures that the cloud provider never has access to the encryption keys or the plaintext data. Even if the cloud provider's infrastructure is compromised or they have administrative access, the data remains encrypted and unreadable. This provides the strongest protection because the cloud provider is excluded from the cryptographic trust boundary.
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.
✗
Use transport layer security (TLS) for data in transit
Why it's wrong here
TLS only protects data during transmission, not at rest in the cloud.
✓
Implement client-side encryption with keys managed on-premises
Why this is correct
Client-side encryption ensures data is encrypted before leaving the premises, and the cloud provider never has access to plaintext or keys.
Related concept
Read the scenario before looking for a memorised answer.
✗
Encrypt data at rest using server-side encryption with AES-256
Why it's wrong here
Server-side encryption means the cloud provider manages encryption keys and may have access to plaintext.
✗
Enable the cloud provider's key management service
Why it's wrong here
Cloud KMS gives the provider access to encryption keys, reducing protection against provider exposure.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse 'encryption at rest' or 'TLS' with full data protection, failing to realize that these methods still allow the cloud provider to access plaintext data either during processing or through key management access.
Detailed technical explanation
How to think about this question
Client-side encryption typically uses a symmetric key (e.g., AES-256-GCM) or an asymmetric key pair where the private key never leaves the on-premises environment. The data is encrypted before being sent to the cloud, and the cloud provider stores only ciphertext. This approach aligns with the principle of 'zero-knowledge' encryption, where the cloud provider cannot access plaintext even with full administrative privileges. In contrast, server-side encryption with KMS often involves envelope encryption where the cloud provider holds the master key, creating a single point of trust failure.
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 practitioner preparing for the CISA exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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.
Protection of Information Assets — This question tests Protection of Information Assets — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Implement client-side encryption with keys managed on-premises — Client-side encryption with keys managed on-premises ensures that the cloud provider never has access to the encryption keys or the plaintext data. Even if the cloud provider's infrastructure is compromised or they have administrative access, the data remains encrypted and unreadable. This provides the strongest protection because the cloud provider is excluded from the cryptographic trust boundary.
What should I do if I get this CISA 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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Question Discussion
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