This deliverable presents the final design of the MUSA Security Assurance Platform SaaS. It explains how the monitoring, the security enforcement and the notification mechanisms are integrated into the final version of the MUSA Security Assurance Platform SaaS. The role of this platform in the MUSA workflow as well as the requirements addressed by the final version of the platform are exposed. The deliverable offers the design and implementation details of the security assurance mechanisms and the integrating parts of the MUSA Security Assurance Platform. A highlight on the innovation brought by the final platform prototype as well as its own security features are also detailed in this deliverable. A complete user manual is presented to describe how the MUSA Security Assurance can be used.