A-CDM是以机场为中心，通过各参与方的资源合理调配和数据集成共享来进行协同决策，从而提高机场整体运行效率。信息共享是机场CDM的基础，通过共享，机场、空管、航空公司等的数据集成到统一的A-CDM平台。然而，这也给平台中敏感数据的安全性带来了新的威胁。保护A-CDM数据安全的一种方法，是对其中的敏感数据进行加密。但传统的加密限制了数据的使用，影响了协同决策的功能和性能。本课题深入研究A-CDM平台中加密数据计算（包括加密数据的共享、搜索以及分析和挖掘）的关键技术。通过多项技术和方法的研究（条件代理重加密、对称可搜索加密、Somewhat同态加密等）来达到如下目标：在保护A-CDM数据安全性的同时，实现及时、有效的机场协同决策。力争在关键技术的研究中取得创新性的成果，并设计数据安全增强的A-CDM仿真测试平台，以对上述目标进行有效的测试。

Airport Collaborative Decision Making (A-CDM) is the concept which aims at improving operational efficiency at airports by reducing delays, improving the predictability of events during the progress of a flight and optimizing the utilization of resources. Based on sharing data between all partners and operational decisions to be made collaboratively, A-CDM provides a substantial contribution to maximizing capacity and efficiency. By data sharing, the data from the airport, the air traffic controller, and the airline can be integrated into a uniform A-CDM platform. However, it also brings new threat for the sensitive data in A-CDM platform. To secure the sensitive data, the encryption can be used. However, the traditional encryption limits the utilization of data, which then affects the functionality and performance of the decision making. This project will focus on the key technology research for computing on encrypted data (including sharing, search, and mining of ciphertexts) in A-CDM platform. The research includes 3 parts: (1) conditional proxy re-encryption for secure data sharing, (2) symmetric searchable encryption for secure data retrieval, and (3) somewhat homomorphic encryption for secure data analyzing and mining. Through creative works, we will propose the efficient and secure solution for A-CDM, based on computing on encrypted data. Furthermore, we will also design security-enhanced A-CDM simulation platform to demonstrate the effectiveness of our solution.