However, the modes of centralized access control and key distribution limit the extension of their group sizes.
然而，由于其集中式访问控制和密钥分配方式，限制了组规模的进一步扩展。
This paper presents a multi-group access control scheme that achieves multi-privileged access by combining the centralized and distributed key management scheme.
该文提出了一种多重组的访问控制方案，该方案使用集中式与分布协同式相结合的密钥更新算法实现了多权限的控制。
In modern industrial areas, machine group control is a very important control method for centralized monitoring and control.
在现代轻工业领域，机群控制是一种非常重要的控制方式，用于集中检测和控制。
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