| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To enhance confidentiality and restorability of data storage by dividing and storing management information for managing storage places of divided data, etc. <P>SOLUTION: Pieces of the divided data are generated, first management information indicating the storage places of the divided data is generated for the predetermined number of pieces of divided data, the first management information is stored in a storage part of a data division management device, second management information including storage place information indicating the storage places of the divided data is generated for the divided data except the predetermined number of pieces of divided data, the second management information is divided into a plurality of pieces, pieces of the divided data are stored in storage devices specified by the first management information and the second management information, one of the pieces of the second management information is stored in the data division management device and the other pieces of the second management information are stored in the storage device specified by the first management information. <P>COPYRIGHT: (C)2004,JPO</p> |
