| 摘要 |
PROBLEM TO BE SOLVED: To improve the safety of secret protection or the like by inhibiting the restoration of information without the permission of plural managers. SOLUTION: Source information 1 with the need of the secret protection is divided into the plural pieces of divided information 4A, 4B and 4C corresponding to a prescribed rule by a division device 2. They are respectively stored and kept in different media 5A, 5B and 5C and the media are respectively managed by the different managers. In the case of restoring the information, the permission of the managers is obtained, the divided information is read from the respective media and it is restored corresponding to an original, division rule. |
