发明申请
- 专利标题: PRESERVING PRIVACY OF DATA STREAMS USING DYNAMIC CORRELATIONS
- 专利标题(中): 使用动态关联保护数据流的隐私
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申请号: US11678786申请日: 2007-02-26
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公开(公告)号: US20080209568A1公开(公告)日: 2008-08-28
- 发明人: Yuan-Chi Chang , Feifei Li , Spyridon Papadimitriou , George A. Mihaila , Ioana Stanoi , Jimeng Sun , Philip S. Yu
- 申请人: Yuan-Chi Chang , Feifei Li , Spyridon Papadimitriou , George A. Mihaila , Ioana Stanoi , Jimeng Sun , Philip S. Yu
- 申请人地址: US NY ARMONK
- 专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人: INTERNATIONAL BUSINESS MACHINES CORPORATION
- 当前专利权人地址: US NY ARMONK
- 主分类号: G06F21/06
- IPC分类号: G06F21/06
摘要:
Disclosed is a method, information processing system, and computer readable medium for preserving privacy of nonstationary data streams. The method includes receiving at least one nonstationary data stream with time dependent data. Calculating, for a given instant of sub-space of time, A set of first-moment statistical values is calculated, for a given instant of sub-space of time, for the data. The first moment statistical values include a principal component for the sub-space of time. The data is perturbed with noise along the principal component in proportion to the first-moment of statistical values so that at least part of a set of second-moment statistical values for the data is perturbed by the noise only within a predetermined variance.