CompTIA Security+ Question H-58

Protecting the confidentiality of a message is accomplished by encrypting the message with which of the following?

A. Sender’s private key
B. Recipient’s public key
C. Sender’s public key
D. Recipient’s private key

Answer: B

To achieve both authentication and confidentiality, the sender should include the recipient’s name in the message, sign it using his private key, and then encrypt both the message and the signature using the recipient’s public key.

Topic 7, Mixed Questions