CompTIA SecurityX Practice Questions: Cryptography

6 free, exam-style CompTIA SecurityX (CAS-005) practice questions covering Cryptography. Each question shows the correct answer and a clear explanation. Ready for the real thing? Take the full timed quiz below.

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Q1. Which of the following is MOST important when implementing homomorphic encryption?

Explanation: Homomorphic encryption currently has significant performance costs. Learn more.

Q2. What is the PRIMARY security consideration for post-quantum cryptographic migration?

Explanation: Hybrid systems maintain security during quantum transition. Learn more.

Q3. Which encryption method is MOST secure for data at rest in a high-security environment?

Explanation: AES-256 provides the highest level of security among the options. Learn more.

Q4. Which of the following is a hardware security module (HSM) MOST commonly used for?

Explanation: HSMs provide secure key generation, storage, and management. Learn more.

Q5. What is the PRIMARY risk of using deprecated SSL/TLS versions?

Explanation: Older versions (e.g., SSL 3.0, TLS 1.0) have exploitable flaws. Learn more.

Q6. Which cryptographic approach lets a server prove certificate validity without clients downloading full revocation lists?

Explanation: Online Certificate Status Protocol allows clients to check certificate revocation status with an authority responder. Learn more.

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