A Blockchain-Based Identity Collaboration Model for Cross-Airport Employee One-Card Systems

Abstract

With the deepening of civil aviation group operations, the collaborative management of employee identity and permissions across member airports faces challenges such as data silos, cumbersome mutual recognition processes, and high trust costs associated with centralized systems. This paper proposes a collaborative model for civil aviation employee one-card systems based on Blockchain and Decentralized Identifiers (DIDs). This model stores core employee identity markers, permission attributes, and key behavioral records on the chain, establishing a unified, cross-airport trustworthy digital identity system characterized by "One Card, One Chain, One Identity." By designing a permission synchronization and verification mechanism based on smart contracts, it enables rapid identity verification and compliant access for employees at any airport within the group. The paper focuses on a cross-chain relay scheme to address secure and trustworthy data interaction between different airport chains. The model constructed herein provides an innovative technical framework and implementation pathway for large civil aviation groups to achieve efficient, secure, and auditable cross-domain identity collaboration management.