[Problem to be solved] To provide a personal data application system with which it is possible to manage, over a cloud system or other network, persona data such as electronic clinical records, electronic health insurance cards, electronic passports, and electronic ID cards, and to thereby prevent unauthorized use thereof.
[Solution] An opening authentication code and a closing authentication code, which is for performing normal termination and exiting, are set for various personal data application files that are to be used by a personal data application. The persona data application comprises: an application file opening function for opening a personal data application file once the opening authentication code has been inputted; an application file editing function for accepting data editing done by another authorized person; and an application file closing function for establishing the data editing content provided by the application file editing function once the closing authentication code has been inputted, and the performing normal termination and exiting.