| 摘要 |
PROBLEM TO BE SOLVED: To provide a high-security storage system that bings a file stored in a storage server into a provable state at that time point, and that enables the construction of evidence information effective in time ahead to come. SOLUTION: For responding to a request for fixing a file state from a user (102) through a network (101), in the storage server (103), file fixing assurance data (1050) including data (1051) released by a public server (105) are created, associated with a relevant file and stored. COPYRIGHT: (C)2004,JPO |
