The correct first step is to perform data discovery and classification. This is because PCI DSS Requirement 3.1 mandates that an organization must identify and classify all sources of cardholder data—including logs, databases, and backups—before any remediation can begin. Without this foundational step, subsequent controls like tokenization or encryption may miss critical data stores, leaving plaintext PANs exposed. On the Certified Cloud Security Professional CCSP exam, this question tests your understanding of the data security lifecycle in cloud migrations, emphasizing that discovery precedes protection. A common trap is choosing encryption or access controls immediately, but the exam expects you to recognize that you cannot secure what you have not found. Memory tip: “Discover before you secure—you can’t lock a door you don’t know exists.”
CCSP Cloud Data Security Practice Question
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 is migrating a legacy application to the cloud and must comply with PCI DSS. The application currently logs credit card numbers in plaintext. Which data security control should be implemented FIRST?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Perform data discovery and classification
Before any remediation can be applied, the organization must first perform data discovery and classification to locate where all credit card numbers (PANs) are stored, including logs, databases, and backups. PCI DSS Requirement 3.1 mandates that cardholder data be identified and classified before implementing controls like tokenization or encryption. Without discovery, subsequent controls may miss critical data stores, leaving plaintext PANs exposed.
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.
✗
Implement tokenization for credit card numbers
Why it's wrong here
Tokenization is a control but should follow discovery and classification.
✗
Deploy a data loss prevention (DLP) solution
Why it's wrong here
DLP is a detective control, not the first step.
✗
Encrypt the database at rest
Why it's wrong here
Encryption is a control but should follow classification.
✓
Perform data discovery and classification
Why this is correct
First step is to find and classify sensitive data to understand scope.
Clue confirmation
The clue word "first" in the question point toward this answer.
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 principle that security controls must be preceded by a discovery and classification phase, trapping candidates who jump to a technical solution like encryption or tokenization without first understanding the full scope of data exposure.
Detailed technical explanation
How to think about this question
Data discovery tools often use pattern matching with Luhn algorithm validation (ISO/IEC 7812) to identify PANs, but legacy applications may store truncated or obfuscated card numbers that require context-aware scanning. In a real-world migration, a financial services firm discovered that its legacy app stored PANs in application-level log files with custom delimiters, which a standard DLP regex missed; only after a full classification exercise were these hidden stores found and remediated. This step also satisfies PCI DSS Requirement 12.8.4 for maintaining an inventory of cardholder data environments.
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: Perform data discovery and classification — Before any remediation can be applied, the organization must first perform data discovery and classification to locate where all credit card numbers (PANs) are stored, including logs, databases, and backups. PCI DSS Requirement 3.1 mandates that cardholder data be identified and classified before implementing controls like tokenization or encryption. Without discovery, subsequent controls may miss critical data stores, leaving plaintext PANs exposed.
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.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
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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