The 5G mobile communication network provides seamless communications between users and service providers and promises to achieve several stringent requirements, such as seamless mobility and massive connectivity. Although 5G can offer numerous benefits, security and privacy issues still need to be addressed. For example, the inclusion of small cell networks (SCN) into 5G brings the network closer to the connected users, providing a better quality of services (QoS), resulting in a significant increase in the number of Handover procedures (HO), which will affect the security, latency and efficiency of the network. It is then crucial to design a scheme that supports seamless handovers through secure authentication to avoid the consequences of SCN. To address this issue, this article proposes a secure region-based handover scheme with user anonymity and an efficient revocation mechanism that supports seamless connectivity for SCNs in 5G. In this context, we introduce three privacy-preserving authentication protocols, i.e., initial authentication protocol, intra-region handover protocol and inter-region handover protocol, for dealing with three communication scenarios. To the best of our knowledge, this is the first paper to consider the privacy and security in both the intra-region and inter-region handover scenarios in 5G communication. Detailed security and performance analysis of our proposed scheme is presented to show that it is resilient against many security threats, is cost-effective in computation and provides an efficient solution for the 5G enabled mobile communication.

翻译：5G移动通信网络提供用户和服务提供者之间无缝通信,并承诺实现若干严格要求,如无缝流动和大规模连通。虽然5G可以带来许多好处,但安全和隐私问题仍有待解决。例如,将小细胞网络纳入5G,使网络更接近连接用户,提供更高质量的服务(QOS),从而大大增加移交程序的数量,这将影响网络的安全、延缓和效率。然后,至关重要的是,设计一个计划,通过安全认证支持无缝移交,以避免空间网络的后果。为解决这一问题,本篇文章提出一个基于安全的区域移交计划,以用户匿名为基础,并建立一个高效的撤销机制,支持连接5G。在这方面,我们为处理三种通信情景,即初步认证协议、区域内部移交协议和区域间移交协议的数量将大幅增加。为了应对三种通信情景,我们所了解的最佳情况,这是审议区域内和区域间的隐私和安全移交计划的第一份文件。为了应对5G号拟议的安全移交方案,我们提出了一个高效的解决方案,在5G号通信中展示了高效的风险评估方案。