The present White Paper will focus on MEC (Multi-access Edge Computing) technologies and intends to explore security-related use cases and requirements with the aim of identifying aspects of security where the nature of edge computing results in insufficient industry approaches to cloud security. Edge computing environments are by nature characterized by a complex multi-vendor, multi-supplier, multi-stakeholder ecosystem of equipment including both HW and SW devices. Given this overall level of system heterogeneity, the areas of security, trust, and privacy are key topics for the edge environments. Finally, the advent of edge cloud federations and the presence of (far) edge devices, e.g., in Internet-ofThings environments, requires tackling MEC security with an end-to-end (E2E) approach by leveraging existing standards relevant in the area, as carefully selected to be applicable in edge computing systems.