简述网络个性化信息服务中泄露个人隐私的主要途径以及隐私保护的必要性；
This paper briefly expatiates on the significance of the privacy protection and main ways to the leakage of personalized privacy in the web personalized information service.
现今，对于个性化搜索的研究大多仅关注于提高个性化搜索质量，而忽略了用户的隐私安全保护。
Nowadays the research of the personalized web search only focuses on how to improve the quality of the search, ignoring the protection of user privacy.
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