| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To prevent divided data stored in a storage unit from being restored to an original data even when the data is stolen. <P>SOLUTION: After a storage unit 2 is authorized based on the authentication by a one-time ID, a computer unit 1 encrypts an object data and generates two divided data by dividing it using a predetermined pattern. The computer unit 1 then stores one of the two divided data into a storage medium 21 of the storage unit 2, and stores the other into the own device. Also, after the storage unit 2 is authorized based on the authentication by the one-time ID, the computer unit 1 reads out one of the divided data from the storage medium 21 of the storage unit 2, and restores the original data by synthesizing and decrypting the two divided data with the predetermined pattern. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
