Difference between active and passive security threats

1. What is the difference between active and passive security threats?
2. List and briefly define 3 categories of passive and active security attacks.
3. List and briefly define at least 3 categories of security services.
4. List and briefly define at least 3 categories of security mechanisms.
5. Create a matrix highlighting the relationship between the security services and the mechanisms listed in questions 3 and 4. Place services to the left (vertically), the mechanism to the right (horizontally), then place an X for the applicable mechanisms to the services.
6. What are the essential differences of a symmetric cipher?

Sample Solution