CompTIA Security+ Question D-23

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

Answer: A

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.