Increasingly, objects—previously unidentified as requiring networked communications—are becoming a part of what is known as the “Internet of Things (IoT)”.  On the battlefield, future warfighter operations and missions will rely more heavily on networked devices designed with autonomous cognitive decision-making capabilities to perform a broad range of tasks, including cognitive sensing, communicating with human warfighters, conducting operations in congested environments, and securely processing and communicating data to other autonomous agents.  The breadth and magnitude of the challenges facing computation on the IoT and Internet of Battle Things (IoBT) is staggering.  In this talk, we will narrow our focus to the computational modeling challenges related to autonomous cyber defense of IoT/IoBT security in contested and congested environments.