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.
Incorrect Answers:
B: Availability refers to the measures that are used to keep services and systems operational
C: Confidentiality means that the message/data retains its privacy.
D: Remediation is concerned with security posturing.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, 6th Edition, Sybex, Indianapolis,
2014, pp. 261, 291, 414