| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To newly add distributed information without restoring original secret information and without making an administrator hold restorable distributed information. <P>SOLUTION: A distributed information adding device 20 sends selected numbers (x, i) and (y, i) to storage server devices 10<SB>x</SB>and 10<SB>y</SB>on the basis of line numbers x, y, z and for each distributed partial data D(z, i) of the line number z. The storage server devices 10<SB>x</SB>and 10<SB>y</SB>transmit, based on the numbers, distributed partial data or exclusive OR data between the distributed partial data to the distributed information adding device 20. The distributed information adding device 20 performs an exclusive OR operation of each data to create distributed partial data D(z, i) and deletes each data. The distributed information adding device 20 repeats the processing to each distributed partial data D(z, i), and transmits the distributed information D(z) composed of acquired distributed partial data D(z, 0), ..., D(z, i), ..., D(z, n-2) to the storage server device 10<SB>z</SB>. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
