ANONYMITY SYSTEM, POSSESSION DEVICE, ANONYMITY DEVICE, USER DEVICE, ANONYMITY METHOD AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To keep accuracy of information even if there is much attribute information included in individual information.SOLUTION: A possession device 1 memorizes individual information including multiple attribute information about at least one individual. The possession device 1 divides the individual information in the attribute information unit and provides divided information. The possession device 1 distributes the divided information to an anonymity device 3. A user device 5 requires anonymity information that desired attribute information is anonymous to the anonymity device 3. The anonymity device 3 provides anonymous divided information following a request from the user device 5 by anonymity of the divided information. The anonymity device 3 outputs the anonymous divided information to the user device 5. The user device 5 provides anonymity information by unifying the anonymous divided information.