Potential NASA Commercial Applications: The potential use of Secure DTN for NASA applications is significant. Security of space missions has become a major challenge on a national and international level. Secure DTN will provide a strong framework that will be deployed on-board space missions, at ground stations and end user terminals. The framework will be able to protect sensitive and classified information, manned life support systems, and intellectual property. Economic pressure continues to push missions toward reuse of existing ground and space assets. International collaboration is also encouraged in order to reduce costs. The proposed framework is a solution that meets these goals by enabling non-conventional communication architectures to be implemented without compromising data privacy and integrity.