Blockchain-Based Security Deployment and Resource Allocation in SDN-Enabled MEC System

The traditional data security systems have the problems, such as poor adaptability, technical barriers, and closed interfaces, which cannot meet the development requirements of beyond 5G (B5G) and the Internet of Things (IoT). In this article, we design a novel deployment network framework for adaptive security by using blockchain technology in the software defined network (SDN)-enabled mobile edge computing (MEC) system. The blockchain is deployed on multiple SDN servers, ensuring decision consistency and data security. The distributed SDN controllers can schedule and combine atomic security functions (ASFs) from the security resource pool of the MEC system to provide comprehensive security services. Furthermore, we developed a multiagent deep deterministic policy gradient (MADDPG) scheduling optimization algorithm to enhance the utility of our model while optimizing latency and energy cost. Simulations indicate that the algorithm successfully maximizes the overall utility of the MEC system, while adhering to the constraints of latency and energy cost.