CompTIA Security+ Question B-58

Users need to exchange a shared secret to begin communicating securely. Which of the following is another name for this symmetric key?

A. Session Key
B. Public Key
C. Private Key
D. Digital Signature

Answer: C

Symmetric algorithms require both ends of an encrypted message to have the same key and processing algorithms. Symmetric algorithms generate a secret key that must be protected. A symmetric key, sometimes referred to as a secret key or private key, is a key that isn’t disclosed to people who aren’t authorized to use the encryption system.