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专利名称：IDENTITY INFORMATION DE-IDENTIFICATION DEVICE
发明人：HARADA KUNIHIKO,TOGASHI
YUMIKO,SATO YOSHINORI
申请号：EP11783338申请日：20110405公开号：EP2573699A4公开日：20150603
摘要：A de-identification device is provided for automatically configuring a generalhierarchy tree of attribute values in protection technology of identity information. Inaddition, the provided de-identification device quantitively evaluates the amount ofinformation which is lost when generalizing an attribute value, and can thereby
automatically assess priorities between de-identified data and between data that is beingde-identified. Information of each person includes attribute values of the person for aplurality of attributes. De-identification is achieved by obfuscating the attribute values,and a structure in which attribute values to be obfuscated are expressed in a treestructure according to the level of obfuscation is called a general hierarchy tree. Thedisclosed identity information de-identification device achieves automatic configurationby configuring a tree using frequency information of attribute values. In addition, bydefining a lost information amount metric means, using the general hierarchy tree, information amount loss between two de-identified data or between data being de-identified is quantitively assessed.
申请人：HITACHI, LTD.
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