Patent ID: 7962492

Claim:
A personal information data processing method that causes a computer to execute processing of personal information data including identification information that enables identification of a specific individual, the method comprising: a identification information database function providing storage of identification information in which identification information that enables identification of a specific individual, the identification information database function comprising: a step of displaying in a specifiable fashion a division range comprising a boundary that eliminates an identification function of the identification information when stored, in a manner which renders the identification information meaningless; a step of receiving a division location specification from a user when displaying the division range; a step of dividing the identification information into at least a first fragment and a second fragment in accordance with the division location specified by the user, wherein each fragment by itself does not enable identification of a specific individual; a step of generating a first linkage key information comprising an association between the first fragment and the second fragment; and a step of storing the first linkage key information, the first fragment and the second fragment in a storage section; and an attribute information database function providing storage of attribute information that does not by itself enable identification of a specific individual, the attribute information database function comprising: a step of storing the attribute information and stored as a separate database from the identification information as segmented information; and a step of linking the attribute information to the identification information associated with the identification information database by a second linkage key information.