CompTIA Security+ Question F-74

A company uses PGP to ensure that sensitive email is protected. Which of the following types of cryptography is being used here for the key exchange?

A. Symmetric
B. Session-based
C. Hashing
D. Asymmetric

Answer: A

Explanation:
PGP combines symmetric-key encryption and public-key encryption. The message is encrypted using a symmetric encryption algorithm, which requires a symmetric key. Each symmetric key is used only once and is also called a session key.