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
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.
The symmetric key is exchanged by using asymmetric cryptography, thus the correct answer is D
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