To specify any change of the presence of a storage medium storing information or a person, and to prevent an operation which might lead to leakage of information in advance.
The combination of the category and level of information is defined as a label, and conditions for executing an operation which is highly likely to exceed the shared range of the information for each label are defined as a policy list, and a label is assigned to the file. Furthermore, when a user holds an IC card over a sensor to enter/leave a room, the presence information of the user is obtained. Thus, when the user operates the file, and the attribute information or presence information of the user and the storage medium of a file or the like do not conform to the policy list, the operation is prevented so as to prevent an operation which might lead to the leakage of information in advance. Furthermore, during approving operation when the file is carried to the outside of an organization, a leakage risk is calculated from the content and carriage-out method of the file to be carried out, and the place whose risk is high is presented to an approver so that an approver accurately grasps a leakage risk to make an approval determination.
COPYRIGHT: (C)2010,JPO&INPIT
Masato Arai
Mitsuhiro Oikawa
Kusunoki Takuya
Yamaguchi
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