A Web application and its support environment has not been fully fortified against attack. Web engineers estimate that the likelihood of repelling an attack is only 30 percent. The application does not contain sensitive or controversial information, so the threat probability is 25 percent. What is the integrity of the web application?

1. A0.625
2. B0.725
3. C0.775
4. D0.825

Pick an option to check yourself, or open the answer below.

Show answer & explanation

Correct answer: D. 0.825

Explanation

Integrity = 1 − threat × (1 − security) = 1 − 0.25 × (1 − 0.30) = 0.825.