CompTIA Security+ Question K-56

Certificates are used for: (Select TWO).

A. Client authentication.
B. WEP encryption.
C. Access control lists.
D. Code signing.
E. Password hashing.

Answer: A,D

Explanation:
Certificates are used in PKI to digitally sign data, information, files, email, code, etc. Certificates are also used in PKI for client authentication.