A Fast Authentication Scheme for Cross-Network-Slicing Based on Multiple Operators in 5G Environments.

With 5G Network Slicing, the 5G telecommunication operators can achieve the goal of supporting users with a variety of different services and can also create a slice with certain unique characteristics. For example: Enhanced Mobile Broadband slicing, Ultra-reliable and Low Latency Communications slicing, etc. However, the traditional authentication mechanism does not address any concrete strategy for network slicing handover in 5G, so that the computational process must be still calculated by the core network. Hence, we propose a network slicing handover authentication scheme that not only satisfies the standards defined by 3rd Generation Partnership Project but also achieves low time latency through delegating computation overhead to the edge clouds. In addition, we incorporate the concepts of the proxy re-signature and certificateless signature in the scheme. As a result, when users need to use the network slicing services across the telecommunications operators, they can still meet the requirements of reducing the time latency in the process of the authentication flows.