Enhancing Security and Trust in 5G Roaming Services: An LBO Architecture Leveraging Intel SGX Technology for Secure Charging and Authentication

Abstract

Commercially deployed 5G networks can enhance efficiency within roaming scenarios. The significance of billing and authentication in roaming extends beyond subscriber payments, as it is intricately linked to the assets of mobile network operators. However, the existing trust-based roaming architecture establishes a vulnerable security trust relationship, posing challenges in trusting and verifying mobile network operators during roaming. While previous research has predominantly focused on performance-related aspects in local breakout scenarios, studies addressing security concerns in billing and authentication are still nascent. This paper delves into the billing and security intricacies of the local breakout in 5G stand-alone networks. It proposes a design that leverages Intel SGX technology to securely implement billing and authentication in local breakout. Based on the suggested local breakout architecture, our research utilizes the SGX framework to validate integrity through Remote Attestation and Sealing, concurrently ensuring optimal performance.