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Group key agreement scheme is more adaptable than group key distribution in DPG in which its membership can be frequently changed.
在群成员随时变动的动态对等群组中，群密钥协商比群密钥分配更适用。
Dynamic security of group key distribution is always the key point and difficult point in the research field of multicast security.
群密钥分配的动态安全性一直是组播安全研究的重点和难点。
A group key distribution scheme utilizing a polynomial expansion is proposed, which features in no traditional encryption and decryption.
提出了一种利用多项式展开的组密钥分配方案，其特点是不使用传统加密和解密。
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