Capability

The capability of an attacker (in the sense we use it in this guide) is what the attacker is able to do to achieve its aims. For example, a country's security services might have the capability to listen to telephone calls while a neighbor may have the capability to watch you from their window. To say that an attacker “has" a capability does not mean that they will necessarily use that capability. It does mean that you should consider and prepare for the possibility.