| 摘要 |
Authority permission grants/denials associated with each of a plurality of roles (R1, R2, . . . , Rm) assigned to one subject are derived by inheritance based on a subject assignment associating a role and a subject, an authority permission assignment associating a role, an authority permission, and a grant/denial, and a role hierarchy indicating an inheritance relation between roles. Among the derived authority permission grants/denials, grants/denials of authority permissions (A1, A2, . . . , An) which are each derived from two or more different roles (R1, R2, . . . , Rm) and which are each granted to one of the plurality of roles R1, R2 . . . Rm but denied to another one of the plurality of roles R1, R2 . . . Rm are determined in accordance with an input. As exceptional authority permission assignment for a virtual exceptional role constituted of a combination of roles (R1, R2, . . . , Rm), authority permission grants/denials associated with each role (R1, R2, . . . , Rm) are derived by inheritance based on the role hierarchy, authority permission assignment, and the exceptional authority permission assignment.
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