The fifth-generation (5G) of cellular networks is currently under deployment by network operators, and new 5G end-user devices are about to be commercialized by many manufacturers. This is just a first step in the 5G’s development, and the true potential of 5G is still far from being reached. Currently, one of the main 5G technologies under the interest of the research community is the network slicing. Network slicing will allow exploiting the 5G infrastructure to flexibly and efficiently provide heterogeneous services (e.g., voice communication, video streaming, e-health, vehicular communication). Like every new technology, one of the critical aspects that need to be considered is the security. In this article, we spotlight the security in 5G network slicing. We highlight threats and recommendations, which are presented in terms of life-cycle security, intra-slice security, and inter-slice security. Furthermore, we identify and discuss open security issues related to network slicing.

The Fifth Generation (5G) of mobile networks offers new and advanced services with stricter requirements. Multi-access Edge Computing (MEC) is a key technology that enables these new services by deploying multiple devices with computing and storage capabilities at the edge of the network, close to end-users. MEC enhances network efficiency by reducing latency, enabling real-time awareness of the local environment, allowing cloud offloading, and reducing traffic congestion. New mission-critical applications require high security and dependability, which are rarely addressed alongside performance. This survey paper fills this gap by presenting 5G MEC’s three aspects: security, dependability, and performance. The paper provides an overview of MEC, introduces taxonomy, state-of-the-art, and challenges related to each aspect. Finally, the paper presents the challenges of jointly addressing these three aspects.

The privacy of individuals in the context of mobile networks is crucial nowadays. Nevertheless, too few improvements have been made over the years to secure the privacy of subscribers. As a consequence, current generations of mobile networks, including 4G/LTE, are susceptible to sensitive information leakage. In particular, individuals are exposed to location disclosure and movement tracking by revealing subscribers' permanent identifiers. In this article, we discuss the subscribers' private identification problem in light of the recent standardization for 5G. We introduce the problem and discuss existing cryptographic solutions, with a focus on the ECIES-based solution adopted for 5G. We then investigate to what extent the privacy protection mechanisms introduced by the 5G security architecture answer our problem. Finally, we identify challenges, and we distinguish domains of interest and specific research activities to address these challenges.