Study on Delegation Revocation in Attribute Supported Delegation Model

In Attribute Supported Delegation Model (ABDM),delegatee must satisfy both delegation prerequisite condition (CR) and delegation attribute expression (DAE) when assigned to a delegation role.In ABDM,revocation focuses on how to revoke those delegated roles or permissions from delegatee.This paper first introduced two new sorts of revo-cations,which bring about priority between multi-step delegation and revocation.Then analyzed the relation between delegation and and proposed two solutions:first request first response and revocation first then delegation.We also discussed different situations fitting these two solutions.