CompTIA CASP+ (CAS-004) — Question 223

A security architect updated the security policy to require a proper way to verify that packets received between two parties have not been tampered with and the connection remains private. Which of the following cryptographic techniques can be used to ensure the security policy is being enforced properly?

Answer options

• A. MD5-based envelope method
• B. HMAC_SHA256
• C. PBKDF2
• D. PGP

Correct answer: B

Explanation

HMAC_SHA256 is a cryptographic technique that combines a hashing function with a secret key, providing both integrity and authenticity for the transmitted packets. The other options, such as MD5, PBKDF2, and PGP, do not specifically provide the same level of integrity and authentication for packet verification in the context presented.