In this case, the server notifies the delegated client using a callback path existing between client and server, and recalls the delegation.

在这种情况下，服务器会通过客户机与服务器之间的一个回调路径通知授权的用户，并收回授权。

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Based on SPKI technology, proposing multicast distributed access control system: MDAC, as wall as, proposing a delegation certificate path (DCP) searching algorithm based on binary tree.

基于SPKI技术提出了组播分布式访问控制系统MDAC，并提出了基于二叉授权委托树的委托证书路径(DCP)查找算法。

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