Explore secure digital communication strategies for hostile environments in this Black Hat conference talk. Delve into the Endrun system, which adapts NASA's Disruption-Tolerant Networking project to create a reliable, eventually-consistent communication method ideal for activists, refugees, and others operating in compromised internet landscapes. Learn about operational security, various connectivity options, and the advantages of Endrun over current proposals like encrypted transport links and mesh networks. Discover how this system leverages high-throughput physical data transfer methods and supports user-friendly encryption. Examine topics such as bundle protocols, distributed software development, payload repositories, routing mechanisms, and transport options including sneakernet. Gain insights into future developments for long-distance communication and surveillance considerations in this comprehensive exploration of secure communication in modern dystopian scenarios.