Description INTERSECTIONINTERSECTION (INfrastructure for heTErogeneous, Resilient, SEcure, Complex, Tightly Inter-Operating Networks) aims at enhancing the European potential in the field of security by assuring the protection of heterogeneous networks and infrastructures. The project will focus on vulnerabilities at the intersection points between different interoperating network providers. INTERSECTION will design and implement an integrated security framework made of different subsystems and components providing network and infrastructure security. A working prototype will be implemented to be used as final demonstrator of specific scenarios. Involved end-users will share information on attacks and malfunctions, validate obtained results and host the demonstrator. INTERSECTION will also contribute to standardisation in order to foster multi-operator interoperability and coordinated strategies for securing networked systems. Security metrics for assessment and certification of network infrastructures and systems will be defined.In order to achieve its objectives, INTERSECTION has identified the following technical areas of work: Analysis and classification of vulnerabilities of heterogeneous networks Requirements analysis and design of an integrated framework comprising different security tools. Development of techniques and tools for increasing security and resilience of networked systems. Integration of the developed tools and their validation. Standardization and definition of security metrics.A prototype of the security framework will be released during the project. It will be used to build a final demonstrator showing specific scenarios and will be validated by both the INTERSECTION partners playing the role of end-users and the members of Group of Experts supporting the project.