| 摘要 |
PROBLEM TO BE SOLVED: To quickly find out the alteration of a file, even if an external computer makes an unauthorized access to a WWW server in a company to alter the file, and automatically restore it to the state before alteration. SOLUTION: The external computer 1 is freely accessible to the WWW server 3, but not accessible to a backup server 7. The backup server 7 stores the backup file of the WWW server 3. The file updating date and file capacity of the WWW server 3 are periodically compared with the state stored in a non-disclosure server 6 that is a database server. When the file of the WWW server 3 is changed by the external computer 1, the comparison result of the data is not matched, and the changed file of the WWW server 3 is substituted by the backup file stored in the backup server 7. Accordingly, the file of the WWW server 3 is automatically restored to the file before change. COPYRIGHT: (C)2003,JPO |
