Network Service Federated Identity (NS- FId) Protocol for Service Authorization in 5G Network

Fifth generation mobile network (5G) will make network services available anywhere from multiple Service Providers (SP) and its provisioning raises security concerns. The users will require seamless connectivity and secure access to these services. Mobile Network Operator (MNO) will want to provide services to users and be able to share infrastructure resources with other MNOs. This requires robust authentication and authorization mechanisms that can provide secure access and provisioning of service to multiple users and providers in heterogeneous network. Therefore, Federated Identity (FId) with Single Sign On (SSO) could be used for seamless access and provisioning to network services in 5G. So, we propose Network Service Federated Identity (NS-FId) protocol, a federated protocol that provides secure access to services from multiple SPs and provides SSO to users. We formally verify and analyse the proposed NS-FId protocol using ProVerif. We also conduct a security analysis of the protocol's security properties.