在源特定组播，路径(也称为树)产生(或根植)在一个单一的定义来源，而双向数据源特定PIM不是。
In source-specific multicast, paths (also called trees) originate (or are rooted) at a single, defined source, whereas bidirectional PIM is not source-specific.
提出了一种基于组播频道跳变的安全特定源组播通信方案。
This paper proposes a secure source specific multicast scheme based on multicast channel hopping.
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