Abstract
Security is the foundation for successful delivery of 5G networks in a variety of vertical industries. 5G (Next Generation Network) will use the novel mechanical concept to meet the full range of broadband access, high customers and different usage tools and a huge network of devices (such as the Internet of Things) in an ultra-reliable and sensible way. Software Definition Network (SDN) and Network Function Virtualization (NFV) take advantage of advances in distributed computing, such as, Mobile Edge Computing (MEC) is the most search progress to meet these needs. Still, it is a new issue to safely take advantage of these advances and provide protection to customers' in future remote systems. In these respects, this paper outlines the security challenges of cloud, SDN, and NFV, as well as the difficulties of customer protection. This paper describes the answers to these difficulties and future directions for the secure 5G systems. It aims to explain why security is the foundation of 5G, and the differences between 5G and 2G, 3G, 4G in form of security in terms of demand, threat prospects and solutions.