Moving target defense (MTD) in an adaptive execution environment

This paper describes how adaptation support facilitated by an execution environment can be used to implement moving target defenses (MTD). Reactive and proactive use of adaptation, although beneficial for cyber defense, comes with additional cost, and therefore needs to be employed selectively. We also describe the pros and cons of using reactive and proactive adaptation for MTD for a representative sample of adaptations supported by an execution environment that we are developing.