The auxiliary keys are distributed in a form of a Huffman tree as in the router domain and a form of a complete binary tree in each member router.That makes the key management scalable.

• 在本文中，我们利用分层管理的概念将整个群播群组分成路由器区域与成员区域，并分别以霍夫曼树及完全二元树的架构来建立其对应的辅助金匙分散树，这使得我们的群播金匙管理拥有可量化的特性。