This effort supports the overall AFRL trusted protocol program by developing the architectural view more completely, even as some of the subtasks are executing in the research and development domain, and to compare and provide analysis on the evolution of the architecture through the beginning of the implementation phase. The objective of the effort under this task is to formulate an appropriate architecture sequence suitable for the spiral development of secure routing capability, while analyzing appropriate components of the current code base for partitioning and effective transition to the spiral approach.