Abstract
5G is the fifth generation wireless technology for digital cellular networks that began wide deployment in 2019. As with previous standards, the covered areas are divided into regions called cells, serviced by individual antennas. Virtually every major telecommunication service provider in the developed world is deploying antennas or intends to deploy them soon. The frequency spectrum of 5G is divided into millimetre waves, mid-band and low-band. Low-band uses a similar frequency range as the predecessor. The 5G networks will form a part of crucial infrastructure for the maintenance of vital societal and economic functions. The approach to 5G network security is to be comprehensive and risk-based. 5G security is seen as a continuous process, which starts with the selection of the vendors and lasts the whole way through the production of the network elements and the lifetime of the operation of the networks. Non-technical factors should also be considered when a supplier's risk profile is drawn up and components critical for national security should be sourced from trustworthy parties only.
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