P2P网络的匿名性和动态性带来了许多安全问题，传统的信任管理模型并不能很好的适应对等网络环境。
The anonymity and dynamics of the P2P (peer to peer) network bring many security problem, The traditional trust manage model can not satisfy the P2P environment commendably.
由于分布式网络具有开放性、协作性和动态性的特点，每个节点具有高度的自主性，所以很难对信任进行集中管理。
The distributed network is open, collaborative and dynamic, in which each node has a high degree of autonomy. So it is difficult to carry out centralized management of trust.
由于分布式网络具有开放性、协作性和动态性的特点，每个节点具有高度的自主性，所以很难对信任进行集中管理。
The distributed network is open, collaborative and dynamic, in which each node has a high degree of autonomy. So it is difficult to carry out centralized management of trust.
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