There is inherent tension between network performance and security. With the rapidly evolving drive for military and economic data being accessible via Service Oriented Architectures, the import of securing such data is increasing and the consequences for a security breach often are detailed in our daily media. Complex security architectures are maturing, but broad questions remain about how to certify or accredit the transactions occurring in Net-Centric Enterprise Services. This presentation does not propose a solution and is intended to motivate discussion, collaboration and directed research.