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

Explanation:
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