INFORMATION MANAGEMENT APPARATUS, DATA PROCESSING METHOD AND COMPUTER PROGRAM

An information management apparatus includes: a data receiving section, a collected data storage section, an aggregating section, a feature extracting section, a determining section, and an evaluation data storage section. The data receiving section periodically receives action data showing an action of a user. The collected data storage section stores the action data received by the data receiving section every user. The aggregating section generates a data set every user by aggregating action data containing an approximate content, of the action data stored in the collected data storage section. The feature extracting section extracts an index and a reference showing privacy confidentiality of the data set as a feature to incorporate in the data set. The determining section determines whether or not the privacy confidentiality of the feature of the data set is equal to or higher than a predetermined level. The evaluation data storage section stores the data set which passed the determining section.