Digital Signatures provide which of the following?

A.
Confidentiality

B.
Authorization

C.
Integrity

D.
Authentication

E.
Availability

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.
Incorrect Answers:
A: A cryptographic system would be needed to provide Confidentiality.
B: Digital signatures are not used for authorization.
D: Digital signature is one methods of verifying authenticity but there are other methods as well.
E: Digital signatures are not helpful in providing availability.

Dulaney, Emmett and Chuck Eastton, CompTIA Security+ Study Guide, Sixth Edition, Sybex, Indianapolis, 2014, p 414