| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an original assurance system which can be utilized without modifying applications on the external device side. <P>SOLUTION: When being requested to write an electronic document 15 by an operating application 41 being an application program executed by an application server 40, a filter program 11 authenticates the operating application 41 and confirms authorities set to the application 41, and the filter program 11 enciphers the enciphered electronic document to write it in an auxiliary storage device 14 in the case that an authority for write is set. An electronic signature for alteration detection is generated from the document 15 and is written in the auxiliary storage device 14. For this processing, a web server 12 and an operating system (OS) 13 are operated under the control of the filter program 11. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
