The Citadel Platform is a secure, cost-effective and multi-faceted architecture for delivering digital services around the world. Its primary application ecosystem, known as the Sentinel Framework, will serve as an open, flexible and fully programmable network of distributed nodes where decentralized applications (Sentinel Apps) can be hosted and run. Leveraging the power of Citadel Network's underlying decentralized infrastructure and expanding its scope with the infinite flexibility that is afforded by the Sentinel Framework, allows the platform to create a wealth of immutable digital services with a cost-friendly commercial profile ready for mass business and consumer adoption.