INFORMATION FILTER DEVICE, INFORMATION FILTER CONTROL METHOD, CONTROL PROGRAM FOR INFORMATION FILTER AND RECORDING MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide an information filter device and an information filter control method for reducing any labor for managing many user IDs, and for shortening a time required for the determination of access authority.

SOLUTION: This information filter 100 is provided with: a database 9 for storing a relational database and an XML database; a covert channel analysis engine 4 for analyzing the case of applying permission and the other case; an access matrix DB5 for storing an access matrix; a mask matrix DB6 for storing a mask matrix; a permission change rule base 7 for storing an access rule; an inference engine 8 for determining whether or not it is a covert channel according to an access rule stored in the permission change rule base 7 when an access request is made; and an information filter part 1 for executing access control and analytic control in response to an access request to the DB9.

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