中文摘要：

数据融合因其去除冗余信息和延长网络生命周期的优势，成为有效缓解无线传感器网络资源瓶颈问题的重要途径之一，在无线传感器网络上得到广泛的应用。但是，无线传感器网络与生俱来的开放性环境甚至敌对环境部署的特性，给其埋下了安全隐患。因此，数据融合在具体实施过程中，往往易于受到安全攻击。本文从无线传感器网络安全的数据融合展开。重点介绍基于同态加密机制的安全数据融合，并分别介绍当前典型的私钥同态加密算法和公钥同态加密算法，最后介绍一种基于公钥同态加密算法的安全数据融合应用。

英文摘要：

Data aggregation is one of the most important solutions to the limit-resourced problem in wireless sensor network （WSN） by eliminating information redundancy and increasing the lifetime of the network, and widely used in WSN currently. However, WSN has the native trait of deploying in the open area, particularly in the hosthe area, which means potential security threat in WSN. Consequently, in the implementation of data aggregation in WSN, the data is prone to security attacks. The thesis aims to discuss how to ensure the security of data aggregation, then focuses on secure data aggregation based on homomorphic encryption schemes, and makes introduction respectively on typical private and public homomorphic encryption algorithms, finally introduces a secure data aggregation application based on a public homomorphic encryption algorithm in WSN.