TC: Medium: Understanding and Managing the Impact of Global Inference on Online Privacy

对看似无害的信息进行关联，可能会产生推理链，这些推理链所揭示的个人信息比他们意识到的要多得多。然而，尽管媒体报道偶尔会引起人们对个别网站隐私泄露的关注，但仍然没有对用户在其网络世界中面临的根本风险进行全面分析。该项目进行这样一项研究，特别侧重于可与现代多媒体检索和内容分析技术相关联的个人但公开可获得的信息的威胁。这项工作的一个重点是通过揭露更复杂的隐私攻击出现的更广泛的可能性来告知用户潜在的风险。第二个重点是理解用户可以根据这种潜力对自己的隐私进行控制。在分析“全球推理”对隐私的影响时，主要的概念挑战涉及理解向Web服务提供个人信息所提供的好处与这样做所带来的风险之间的权衡。通过将两个传统上分离的社区-网络安全和多媒体--的专业知识结合起来-这项工作推动了隐私保护领域的开始，随着更多的信息进入公共空间，这一领域的重要性有望提高。该项目通过开发直观地展示相关影响的情景，使用户能够更好地了解他们面临的威胁；它还开发了新的工具，支持他们更好地保护自己的隐私。研究成果将通过提升风险意识和赋能管控，造福用户社区。该项目还包括外联活动，包括与伯克利信息技术机会基金会(BFOIT)合作，在这项研究中招募少数族裔学生，组织暑期学校，并通过与Identity Theft 911合作提高公众的风险意识。

Correlation of seemingly innocuous information can create inference chains that tell much more about individuals than they are aware of revealing. However, while media coverage occasionally draws attention to privacy leaks on individual web sites, there is still no comprehensive analysis of the fundamental risks that users face in their online worlds. This project pursues such a study, focusing in particular on the threat of personal, yet publicly available information that can be correlated with modern multimedia retrieval and content analysis technologies. One thrust of the work is informing users about potential risks by exposing the broader possibilities that arise with more sophisticated privacy attacks. A second thrust concerns understanding the control that users can exercise over their privacy in the light of such potential. When analyzing the impact of "global inference" on privacy, the primary conceptual challenge concerns understanding the trade-off between the benefits that providing personal information to web services offers, versus the risks that doing so entails. By combining expertise from two traditionally separate communities---network security and multimedia---this work advances the start of privacy protection in an area that is poised to raise in importance as more information moves into public spaces. The project enables users to better understand the threats they are facing by developing scenarios that intuitively demonstrate the relevant effects; and it develops novel tools supporting them in better protecting their privacy. The research results will benefit the user community by promoting risk awareness and empowering control. The project also includes outreach activities including working with Berkeley Foundation for Opportunities in Information Technology (BFOIT) to recruit minority students in this research, organizing summer schools, and raising public risk awareness by working with Identity Theft 911.