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中文摘要：
提出一种基于代理的移动互联网隐私保护机制，该机制无需信任中心参与，为智能终端用户提供高效的隐私保护服务。首先，基于当前移动互联网服务固有的体系结构，利用代理的预处理优势，通过添加不同层次的代理网关，缓存相关服务信息，并对不同类型的信息采用不同的保护方法，实现具有针对性的隐私保护服务；在此基础上，以位置隐私为例，设计并实现一种基于背景信息的轻量级隐私保护方案；最终，通过理论分析与仿真实现，证明所提方案及机制的安全性和有效性。
英文摘要：
A privacy-preserving scheme was proposed based on proxy gateway, which avoided using the trusted center and provided high quality privacy-protecting services. First of all, based on the existing architecture of mobile Internet, the proxy gateway was employed to cache relevant service information and adopt different privacy-preserving methods for various requirements, which achieve the targeted services. Secondly, taking the location privacy as an example, a lightweight privacy-preserving scheme is designed and achieved, which fully considers the effect of side information. Fi- naUy, theoretical analysis and evaluation results show the effectiveness and safety of proposed scheme.
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