| 摘要 |
Provided is an information management system capable of reliably protecting personal data while ensuring the usefulness of the information when data containing personal data are processed. In an information management system ( 1 ), processing-object data containing personal data are acquired by an information management apparatus ( 2 ), the personal data are extracted from the processing-object data, and the extracted personal data are processed by means of a one-way function to generate a unique code. The personal data contained in the processing-object data are replaced with the unique code to generate primary conversion data, the primary conversion data are transmitted from the information management apparatus ( 2 ) to an information center apparatus ( 4 ), and they are stored in a data base ( 5 ) and used for statistical processing.
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