  The 5th generation (5G) network adopts a great number of revolutionary
technologies to fulfill continuously increasing requirements of a variety of
applications, including ultra-high bandwidth, ultra-low latency, ultra-massive
device access, ultra-reliability, and so on. Correspondingly, traditional
security focuses on the core network, and the logical (non-physical) layer is
no longer suitable for the 5G network. 5G security presents a tendency to
extend from the network center to the network edge and from the logical layer
to the physical layer. The physical layer security is also an essential part of
5G security. However, the security of each layer in 5G is mostly studied
separately, which causes a lack of comprehensive analysis for security issues
across layers. Meanwhile, potential security threats are lack of automated
solutions. This article explores the 5G security by combining the physical
layer and the logical layer from the perspective of automated attack and
defense, and dedicate to provide automated solution framework for 5G security.
