DATA DISTRIBUTED STORAGE SYSTEM

摘要

[Problem] To provide a data distributed storage system that provides distributed storage, in a plurality of data centers, of a plurality of partial data segments generated from important data using secret distribution technology, and that ensures security for preventing illegal acquisition of the partial data segments between each data center. [Solution] Each server (100) has a data storage unit (110) that stores partial data segments received from a client terminal (300). The client terminal (300) has: a segmentation processing unit (310) that generates an n number of partial data segments from important data, using secret distribution technology whereby the important data cannot be restored unless at least a k number (k?n) of partial data segments is gathered; a distribution management unit (320) that stores the n number of partial data segments in an n number of servers (100) and gathers an m number (k?m?n) of partial data segments for restoring the important data, from an m number of servers (100); and a restoration unit (330) that restores the important data from the m number of partial data segments, using the secret distribution technology.