NETWORK-SIDE TRUST MODEL FOR ROAMING AND NONROAMING CASES

Abstract

Evolution of the trust model: The trust model changes as we move from a nonautonomous to an autonomous 5G system. It is believed that the trust in the network decreases as you move away from the core. This affects the decisions made when developing a 5G security system. The trust model in the UE is quite simple: there are two trust domains - the Universal Integrated Circuit Card (UICC), which contains the USIM card (Universal Subscriber Identity Module) and mobile equipment (Mobile Equipment - ME). ME and USIM together form the UE. The network-side trust model for roaming and non-roaming cases is shown in Figures 1 and 2, respectively, which demonstrate trust at multiple levels, like an onion.