Multifactor authentication is the correct choice because it directly addresses the risk of password sharing by requiring two or more distinct authentication factors—something you know, something you have, and something you are. Even if a user shares their password, an attacker cannot gain access without the second factor, such as a hardware token or biometric scan, making the shared credential useless on its own. On the SSCP exam, this question tests your understanding of access control mechanisms and their practical effect on security behaviors; a common trap is choosing password policies or account lockouts, which only discourage sharing but do not prevent it. The exam emphasizes that MFA is the most effective control for reducing password sharing risk because it decouples the password from full access. Remember the memory tip: “Share the password, but not the token—MFA makes the shared key broken.”
SSCP Access Controls Practice Question
This SSCP practice question tests your understanding of access controls. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 administrator wants to ensure that users cannot share passwords. Which control is most effective at reducing the risk of password sharing?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Multifactor authentication
Multifactor authentication (MFA) is the most effective control because it requires users to present two or more distinct factors (e.g., something you know, something you have, something you are) to authenticate. Even if a user shares their password (something you know), an attacker cannot authenticate without the second factor (e.g., a one-time passcode from a hardware token or biometric). This directly reduces the risk of password sharing by making the shared credential insufficient for access.
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.
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Account lockout policies
Why it's wrong here
Account lockout protects against brute-force attempts, not password sharing.
✓
Multifactor authentication
Why this is correct
MFA requires a second factor that is often physical or biometric, making it difficult to share credentials.
Related concept
Read the scenario before looking for a memorised answer.
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Password complexity
Why it's wrong here
Complex passwords are harder to guess but can still be shared.
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Password history
Why it's wrong here
Password history prevents reuse of old passwords, not sharing of current ones.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often choose password complexity or account lockout policies because they associate them with 'stronger security,' but they fail to recognize that these controls do not address the specific threat of voluntary password sharing, which MFA directly mitigates by adding an independent authentication factor.
Detailed technical explanation
How to think about this question
Under the hood, MFA leverages separate authentication factors that are cryptographically independent. For example, a TOTP (Time-based One-Time Password) algorithm (RFC 6238) generates a code based on a shared secret and the current time, which is validated by the server. Even if the password is shared, the attacker lacks the shared secret seed (stored in the user's authenticator app), making the second factor impossible to generate. In a real-world scenario, an organization using MFA with smart cards (PKI-based) ensures that even if a user writes down their PIN, the physical card is required, effectively eliminating the benefit of password sharing.
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 security analyst at a medium-sized enterprise encounters this scenario during an investigation or architecture review. The correct answer reflects best practice for the specific threat or control described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Security exam questions test whether you can match controls to threats in context — not just recall definitions.
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.
Access Controls — This question tests Access Controls — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Multifactor authentication — Multifactor authentication (MFA) is the most effective control because it requires users to present two or more distinct factors (e.g., something you know, something you have, something you are) to authenticate. Even if a user shares their password (something you know), an attacker cannot authenticate without the second factor (e.g., a one-time passcode from a hardware token or biometric). This directly reduces the risk of password sharing by making the shared credential insufficient for access.
What should I do if I get this SSCP 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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