secret u201d are also sent to the structured accessible information storing unit 3 the anonymous information structuring unit 23 sends the personal information separated from the recording information to the information associating unit 22 together with the temporary id such that the personal information is integrated with the personal id step s 10 the information associating unit 22 obtains the personal id corresponding to the temporary id from the table that stores the information item which represents the correspondence integrates the personal information with the personal id encrypts the personal information and sends it to the structured accessible information storing unit 3 step s 11 the structured accessible information storing unit 3 stores the encrypted personal information including the personal id sent from the information associating unit 22 as shown in fig6 the structured accessible information storing unit 3 stores the temporary id sent from the anonymous information structuring unit 23 and anonymous information including the encrypted vital data and the pieces of u201c information that need not be kept secret u201d in the format shown in fig5 step s 12 actually since the vital data and personal information are encrypted the contents of these pieces of information cannot easily be read in addition the processing for encrypting and storing the personal information in steps s 10 and s 11 need not always be executed if the personal information has already been stored in the structured accessible information storing unit 3 more specifically in step s 9 the personal information is separated from the recording information the vital data is encrypted and anonymous information including the encrypted vital data and other pieces of u201c information that need not be kept secret u201d and the temporary id are stored in the structured.