An email client says a digital signature is invalid and the sender cannot be verified. The recipient is
concerned with which of the following concepts?

A.
Integrity

B.
Availability

C.
Confidentiality

D.
Remediation

Explanation:
A digital signature is similar in function to a standard signature on a document. It validates the
integrity of the message and the sender. The message is encrypted using the encryption system,
and a second piece of information, the digital signature, is added to the message. Digital
Signatures is used to validate the integrity of the message and the sender. Integrity means the
message can’t be altered without detection.