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In ABDM, revocation focus on how to revoke those delegated roles or permissions. Considering the characteristics of delegation operation in ABDM, this paper proposes two novel different revocations: revocation triggered by the change of user's delegation attribute expression and revocation triggered by the change of delegation permission's delegation attribute expression. In ABDM, these two revocations...
In existing information systems, a delegation means a user who can assign his/her permissions to someone. In these information systems, however, the delegation security depends entirely on delegations and system administrators, for delegation constraint in delegation is only a prerequisite role. This paper proposes an Attribute-Based Delegation Model (ABDM) with an extended delegation condition consisting...
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