SCZ-HA: A Seamless Cross-Zone Handover Authentication Scheme for V2I Communication

This paper presents SCZ-HA, a security scheme that allows vehicles to smoothly switch between different communication zones when moving along roads (called cross-zone handovers in V2I communication, which connects vehicles to roadside infrastructure like 5G base stations). The scheme uses two types of credentials (long-term and short-term) and a technique called Shamir's secret sharing (a method to split information into pieces so no single piece reveals the secret) to reduce delays and security risks during these handovers, achieving 70.54% faster authentication than existing methods.