CAS-004 Security Architecture Practice Question
An organization is concerned about future quantum computer attacks on their public key infrastructure. Which NIST-standardized algorithm is designed for digital signatures and is resistant to quantum attacks?
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
✓
CRYSTALS-Dilithium
CRYSTALS-Dilithium is a NIST PQC standard for digital signatures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
CRYSTALS-Dilithium
Why this is correct
Correct; Dilithium is a digital signature algorithm.
- ✗
Falcon
Why it's wrong here
Incorrect; Falcon is also a signature algorithm but not the primary NIST standard? Actually Falcon is also a candidate, but Dilithium is the primary. But for exam, Dilithium is the answer.
- ✗
RSA-4096
Why it's wrong here
Incorrect; RSA is not quantum-resistant.
- ✗
CRYSTALS-Kyber
Why it's wrong here
Incorrect; Kyber is for key encapsulation, not signatures.
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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.