Which of the following would be the BEST overall control for an Internet business looking for confidentiality, reliability and integrity of data?

Which of the following would be the BEST overall control for an Internet business looking for
confidentiality, reliability and integrity of data?

A.
Secure Sockets Layer (SSL)

B.
Intrusion detection system (IDS)

C.
Public key infrastructure (PKI)

D.
Virtual private network (VPN)

Explanation:

PKl would be the best overall technology because cryptography provides for encryption, digital
signatures and non repudiation controls for confidentiality and reliability. SSL can provide
confidentiality. IDS is a detective control. A VPN would provide confidentiality and authentication
(reliability).