  Network Function Virtualization (NFV) and Software Distributed Networking
(SDN) technologies play a crucial role in enabling 5G system and beyond. A
synergy between these both technologies has been identified for enabling a new
concept dubbed service function chains (SFC) that aims to reduce both the
capital expenditures (CAPEX) and operating expenses (OPEX). The SFC paradigm
considers different constraints and key performance indicators (KPIs), that
includes QoS and different resources, for enabling network slice services.
However, the large-scale, complexity and security issues brought by these
technologies create an extra overhead for ensuring secure network slicing. To
cope with these challenges, this paper proposes a cost-efficient optimized SFC
management system that enables the creation of SFCs for enabling efficient and
secure network slices. The proposed system considers the network and
computational resources and current network security levels to ensure trusted
deployments. The simulation results demonstrated the efficiency of the proposed
solution for achieving its designed objectives. The proposed solution
efficiently manages the SFCs by optimizing deployment costs and reducing
overall end-to-end delay
