PRIVACY PROTECTION DEVICE, PRIVACY PROTECTION METHOD, AND DATABASE CREATION METHOD
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机译:隐私保护设备,隐私保护方法和数据库创建方法
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摘要
PROBLEM TO BE SOLVED: To provide tabulation data for improving partial sum precision and supporting a non-negative restriction together while satisfying a differential privacy reference.;SOLUTION: A privacy protection device 10 includes: a first conversion section 12 for applying first linear conversion to first tabulation data V to generate first series data W; a random number application section 13 for applying a random number of a predetermined strength to each of elements included in the first series data W to generate second series data W*; a precision section 14 which performs precision processing for correcting each of elements included in the second series data W* under a predetermined condition in such a manner that each of elements in second tabulation data V+ does not become a negative value, thereby generating third series data W+; a second conversion section 15 for applying second linear conversion that is inverse conversion of the first linear conversion, to the third series data W+, to generate the second tabulation data V+; and an output section 16 for outputting the second tabulation data V+.;COPYRIGHT: (C)2016,JPO&INPIT
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