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。
The group improves cargo distribution capacity and eases traffic tension by means of accelerating the construction of strategic loading (unloading) point and regional logistic base;
要通过加快战略装（卸）车点和区域物流基地建设，大幅度提高集疏货物能力，缓解运输紧张局面；
The group improves cargo distribution capacity and eases traffic tension by means of accelerating the construction of strategic loading (unloading) point and regional logistic base;
要通过加快战略装（卸）车点和区域物流基地建设，大幅度提高集疏货物能力，缓解运输紧张局面；
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