Which of the following is not an objective of cryptography?

A. Confidentiality

B. Integrity

C. Availability

D. Non-repudiation

2/ Which is not an attribute of a one-way trap door?

A. It is a mathematical function that is easier to compute in one direction than the opposite direction

B. The forward direction of a one-way function can take seconds to encrypt and the opposite direction can take years to figure out.

C. One-way function is used in symmetric key cryptography because they have to know about the trap door to decrypt

D. RSA is based on a trap door one-way function

3/ Company X would like to place an in-line control devices that actively monitors the network trac for anomalies and enforces access control to prevent distributed denial of service (DDoS) attacks in real-time. What type of device is this?

A. Intrusion Prevention System (IPS)

B. Intrusion Detection System (IDS)

C. Firewall

D. Router ACL