Context-aware security is the use of situational information (such as identity, location, time of day or type of endpoint device) to improve information security decisions.
Extrusion prevention, also called exfiltration prevention, is the practice of stopping data leaks by filtering outbound network traffic and preventing unauthorized packets from moving outside the network. In contrast, extrusion detection simply alerts the existence of a problem that should be investigated.
Spyware is software that is installed on a computing device without the user's knowledge. Spyware can be difficult to detect; often, the first indication a user has that a computing device has been infected with spyware is a noticeable reduction in processor or network connection speeds and in the case of mobile devices -- data usage and battery life.