A message* that has been encrypted by the sender’s private key and again by the receiver’s
public key achieves:
A.
authentication and authorization.
B.
confidentiality and integrity.
C.
confidentiality and nonrepudiation.
D.
authentication and nonrepudiation.
Explanation:
Encryption by the private key of the sender will guarantee authentication and nonrepudiation.
Encryption by the public key of the receiver will guarantee confidentiality.