CAS-004 Security Engineering Practice Question
An incident response team discovers that an attacker was able to forge a certificate for a legitimate domain. Which TWO mechanisms should the team implement to detect and prevent such misissuance in the future? (Select TWO.)
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
✓
Certificate Transparency (CT) logging and monitoring
Certificate Transparency (CT) logs provide an audit trail of all issued certificates, allowing domain owners to detect misissuance. Certificate pinning (or HTTP Public Key Pinning) can prevent the acceptance of fraudulent certificates by clients. OCSP stapling helps check revocation but does not prevent misissuance; CRLs are for revocation; OSCP itself doesn't prevent misissuance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Certificate Revocation Lists (CRLs)
Why it's wrong here
CRLs are for revoking certificates after detection, not prevention.
- ✗
Implementing Extended Validation (EV) certificates
Why it's wrong here
EV certificates require more validation but do not prevent misissuance by a compromised CA.
- ✗
Online Certificate Status Protocol (OCSP) stapling
Why it's wrong here
OCSP stapling checks revocation status, not misissuance.
- ✓
Certificate Transparency (CT) logging and monitoring
Why this is correct
CT logs provide a public record of certificates; domain owners can monitor for unauthorized issuance.
- ✓
Certificate pinning in client applications
Why this is correct
Pinning restricts which CA or public key is trusted, preventing forged certificates from being accepted.
Go deeper
Related to this question
About these practice questions
One of 968 original CAS-005 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 CAS-005 practice question is part of Courseiva's free CompTIA 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 CAS-005 exam.