| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To certainly prevent spoofing even if secret information about a user is leaked to a third party when using service. <P>SOLUTION: First, in this secret information management system 1, the secret information S is divided into a plurality of pieces of data by use of a secret dispersion method (hereinafter called a secret dispersion method A) by original secret dispersion algorithm, and the division data D are stored in storage servers 3a, 3b and a terminal 2. When using the service, redivision data D' wherein the division data D are synchronized and updated are generated and stored in the secret information management system 1 and the terminal 2. When transmitting the division data D' generated by the terminal 2 to the secret information management system 1 from the terminal 2, the secret information management system 1 restores the original secret information S from each piece of the redivision data D' by use of the secret dispersion method A and transmits the secret information S to a service provision system 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
