Chapter 7
Availability Policies
LADY MACBETH: Alack, I am afraid they have awak’d, And ’tis not done. Th’ attempt and not the deed Confounds us. Hark! I laid their daggers ready; He could not miss ’em.
— Macbeth, II, ii, 10–13.
Confidentiality and integrity policies describe what can be done once a resource or information is accessed. Availability policies describe when, and for how long, the resource can be accessed. Violations of these policies may occur unintentionally or deliberately.
7.1 Goals of Availability Policies
An availability policy ensures that a resource can be accessed in some way in a timely fashion. This is often expressed in terms of “quality of service.” As an example, a commercial website selling merchandise will need ...
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