为应对未来民航运输增长的需求，突破传统地面导航设施的限制，有效提升航行安全及效率，新一代的航空监视系统将采用广播式自动相关监视（ADS-B）系统，提供空对空、空对地、以及地对地的数据链路；然而ADS-B的数据链主要使用无线广播方式，且无安全措施的设计，因此存在严重的通信安全风险。本课题在对ADS-B数据链的风险分类及安全性评估的基础上，深入研究ADS-B数据链的通信安全和隐私保护中的关键技术，通过多项技术和方法的研究（基于身份广播签密、假名更新、DOS防御等）来达到如下目标：（1）数据的机密性、完整性和认证性；（2）通信的匿名和位置的不可追踪性；（3）服务的有效性；（4）现有ADS-B标准的兼容性。力争在关键技术的研究中取得创新性的成果，并设计通信安全增强的ADS-B仿真测试平台，以对上述目标进行有效的测试。

To meet future demand for air transport growth, and break the traditional ground navigation aids facilities limitations and effectively enhance flight safety and efficiency, a new generation of air surveillance system will use automatic dependent surveillance broadcast (ADS-B) system to provide air-to-air, air-to-ground and ground-to-ground data link. However, ADS-B data link is a wireless broadcast-type link without designed security measures. Therefore potential communication security vulnerabilities and threats remain to be assessed and resolved. This project will focus on the key technology research for the communication security and privacy preservation of the ADS-B data link. The research includes 4 parts: (1) the risk classification and security assessment, (2) the identity-based broadcast signcryption scheme for the confidentiality, integrity, and authenticity, (3) the pseudonym update scheme for the anonymity and location untraceability, and (4) the resistance scheme of DOS (denial of service) for the availability. Through creative works, we will propose the efficient and secure solution for the communication security and privacy preservation of the ADS-B data link with the necessary constraints: minimizing impact on existing standards and maintaining openness of ADS-B. Furthermore, we will also design security-enhanced ADS-B simulation platform to demonstrate the effectiveness of our solution.