  Computer systems today must meet and maintain service availability,
performance, and security requirements. Each of these demands requires
redundancy and some form of isolation. When service requirements are
implemented separately, the system architecture cannot easily share common
components of redundancy and isolation. We will present these service traits
collectively as cyber resilience with a system called Self Cleansing Intrusion
Tolerance or SCIT. Further, we will demonstrate that SCIT provides an effective
resilient cloud implementation making cost effective utilization of cloud
excess capacity and economies of scale. Lastly, we will introduce the notion of
serverless applications utilizing AWS Lambda and how a stateless architecture
can drastically reduce operational costs by utilizing cloud function services.
