A secure content network in space

Abstract

We present a content network architecture for a cluster of satellites flying in low Earth orbit. The cluster uses a dynamic wireless network to interconnect the satellites and has an intermittent link to the ground. Even though a cluster of satellites fly in formation, their relative positions can vary widely, and occasionally the cluster can disperse and regroup in order to avoid obstacles or to affect a better arrangement. The network, therefore, is a MANET with elements of a disruption tolerant network. Further, data security is a fundamental concern. Our approach is to layer a content network over the wireless network, supporting multiple qualities of service and multiple independent levels of security.