This document discusses how to reduce safety certification costs for unmanned aircraft systems using a certifiable version of the Data Distribution Service (DDS) middleware. It describes how DDS can provide open standards-based communication for UAS networks. The key points are that RTI has developed Connext DDS Cert, a small-footprint, deterministic implementation of DDS that is certifiable to DO-178C Level A. Its minimal lines of code and reusable certification evidence allow users to cut $2M or more from certification costs compared to traditional approaches.