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When approaching the complex problem of improving routing security, it is just as important to take into consideration the operational and business constraints of deployment as it is to tackle the technical challenges. Approaches for securing routing and addressing are only useful if they are implemented and deployed. The Department of Homeland Security, Science and Technology Directorate (S&T) Secure Protocols for Routing Infrastructure project has been working directly with industry and academia with the goal of achieving a practical and secure solution. Through a diverse design team, approaches for securing both Internet addresses and routes have been developed that are both practical and incrementally deployable, and are being standardized through the global standards body for the Internet, the Internet Engineering Task Force (IETF).