在用户层次结构的动态存取控制问题上，本文提出了一种安全有效的方案。

In the problem of dynamic access control, we present a secure and efficient scheme, which is based on discrete logarithms and polynomial interpolation.

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最后从智能决策支持理论出发，研究了层次结构模型下的系统知识化处理及存取管理。

Proceeding from the theory of intelligent decision support, the article also researched the knowledge management and access management behind the hierarchy model.

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最后从智能决策支持理论出发，研究了层次结构模型下的系统知识化处理及存取管理。

Proceeding from the theory of intelligent decision support, the article also researched the knowledge management and access management behind the hierarchy model.

youdao